[PATCH v3 00/12] drm/sun4i: Add A83T HDMI support

[PATCH v3 00/12] drm/sun4i: Add A83T HDMI support

[Jernej Skrabec]

This patch series implements support for A83T DW HDMI and PHY. Contrary to
v1 series, this one is based on latest linux-next, since all needed patches
were merged.

While exactly this combination of HDMI controller and PHY is not common in
Allwinner SoCs, this patch series nevertheless makes groundwork for other
SoCs, which have same DW HDMI IP block, but different PHYs, like H3 and H5.

Please take a look.

Best regards,
Jernej

Changes from v2:
- Collected ACKs and Review-by tags
- patch for deinit callback was replaced with the one which gives control
  of drvdata to driver
- fixed meson driver (renamed reset function)
- prototypes for newly exported functions in dw_hdmi.h were reordered

Changes from v1:
- Collected ACKs
- Separated bindings for controller and PHY
- Split driver into two parts - controller and PHY
- HDMI PHY driver now uses regmap for writes
- added defines for PHY registers and bits
- updated DT entries to accomodate new bindings
- removed already merged clock patch
- reworked first clock patch according to comments
- added new clock patch which changes NKMP formula
- split TCON patch in two, one for quirk and one for new compatible
- reworked patch which exports DW HDMI PHY functions:
  - remove "gen2" from some function names
  - removed parameter from dw_hdmi_phy_reset()
  - added address parameter to dw_hdmi_phy_i2c_set_addr()
- updated most of commit messages

Jernej Skrabec (12):
  clk: sunxi-ng: Mask nkmp factors when setting register
  clk: sunxi-ng: Change formula for NKMP PLLs
  drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a
  drm/bridge/synopsys: dw-hdmi: Export some PHY related functions
  drm/bridge/synopsys: dw-hdmi: don't clobber drvdata
  dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline
  drm/sun4i: Add has_channel_0 TCON quirk
  drm/sun4i: Add support for A83T second TCON
  drm/sun4i: Add support for A83T second DE2 mixer
  drm/sun4i: Implement A83T HDMI driver
  ARM: dts: sun8i: a83t: Add HDMI display pipeline
  ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

 .../bindings/display/sunxi/sun4i-drm.txt           | 197 +++++++++++++-
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts       |  25 ++
 arch/arm/boot/dts/sun8i-a83t.dtsi                  | 119 +++++++-
 drivers/clk/sunxi-ng/ccu_nkmp.c                    |  27 +-
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c          |  83 +++---
 drivers/gpu/drm/imx/dw_hdmi-imx.c                  |  13 +-
 drivers/gpu/drm/meson/meson_dw_hdmi.c              |  22 +-
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c             |  12 +-
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c        |  13 +-
 drivers/gpu/drm/sun4i/Kconfig                      |   9 +
 drivers/gpu/drm/sun4i/Makefile                     |   4 +
 drivers/gpu/drm/sun4i/sun4i_tcon.c                 |  46 +++-
 drivers/gpu/drm/sun4i/sun4i_tcon.h                 |   1 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c              | 181 ++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h              |  46 ++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c             | 302 +++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_mixer.c                |  11 +
 include/drm/bridge/dw_hdmi.h                       |  24 +-
 18 files changed, 1046 insertions(+), 89 deletions(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

-- 
2.15.1

[PATCH v3 00/12] drm/sun4i: Add A83T HDMI support

[Jernej Skrabec]

This patch series implements support for A83T DW HDMI and PHY. Contrary to
v1 series, this one is based on latest linux-next, since all needed patches
were merged.

While exactly this combination of HDMI controller and PHY is not common in
Allwinner SoCs, this patch series nevertheless makes groundwork for other
SoCs, which have same DW HDMI IP block, but different PHYs, like H3 and H5.

Please take a look.

Best regards,
Jernej

Changes from v2:
- Collected ACKs and Review-by tags
- patch for deinit callback was replaced with the one which gives control
  of drvdata to driver
- fixed meson driver (renamed reset function)
- prototypes for newly exported functions in dw_hdmi.h were reordered

Changes from v1:
- Collected ACKs
- Separated bindings for controller and PHY
- Split driver into two parts - controller and PHY
- HDMI PHY driver now uses regmap for writes
- added defines for PHY registers and bits
- updated DT entries to accomodate new bindings
- removed already merged clock patch
- reworked first clock patch according to comments
- added new clock patch which changes NKMP formula
- split TCON patch in two, one for quirk and one for new compatible
- reworked patch which exports DW HDMI PHY functions:
  - remove "gen2" from some function names
  - removed parameter from dw_hdmi_phy_reset()
  - added address parameter to dw_hdmi_phy_i2c_set_addr()
- updated most of commit messages

Jernej Skrabec (12):
  clk: sunxi-ng: Mask nkmp factors when setting register
  clk: sunxi-ng: Change formula for NKMP PLLs
  drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a
  drm/bridge/synopsys: dw-hdmi: Export some PHY related functions
  drm/bridge/synopsys: dw-hdmi: don't clobber drvdata
  dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline
  drm/sun4i: Add has_channel_0 TCON quirk
  drm/sun4i: Add support for A83T second TCON
  drm/sun4i: Add support for A83T second DE2 mixer
  drm/sun4i: Implement A83T HDMI driver
  ARM: dts: sun8i: a83t: Add HDMI display pipeline
  ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

 .../bindings/display/sunxi/sun4i-drm.txt           | 197 +++++++++++++-
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts       |  25 ++
 arch/arm/boot/dts/sun8i-a83t.dtsi                  | 119 +++++++-
 drivers/clk/sunxi-ng/ccu_nkmp.c                    |  27 +-
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c          |  83 +++---
 drivers/gpu/drm/imx/dw_hdmi-imx.c                  |  13 +-
 drivers/gpu/drm/meson/meson_dw_hdmi.c              |  22 +-
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c             |  12 +-
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c        |  13 +-
 drivers/gpu/drm/sun4i/Kconfig                      |   9 +
 drivers/gpu/drm/sun4i/Makefile                     |   4 +
 drivers/gpu/drm/sun4i/sun4i_tcon.c                 |  46 +++-
 drivers/gpu/drm/sun4i/sun4i_tcon.h                 |   1 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c              | 181 ++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h              |  46 ++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c             | 302 +++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_mixer.c                |  11 +
 include/drm/bridge/dw_hdmi.h                       |  24 +-
 18 files changed, 1046 insertions(+), 89 deletions(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

-- 
2.15.1

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[PATCH v3 00/12] drm/sun4i: Add A83T HDMI support

[Jernej Skrabec]

This patch series implements support for A83T DW HDMI and PHY. Contrary to
v1 series, this one is based on latest linux-next, since all needed patches
were merged.

While exactly this combination of HDMI controller and PHY is not common in
Allwinner SoCs, this patch series nevertheless makes groundwork for other
SoCs, which have same DW HDMI IP block, but different PHYs, like H3 and H5.

Please take a look.

Best regards,
Jernej

Changes from v2:
- Collected ACKs and Review-by tags
- patch for deinit callback was replaced with the one which gives control
  of drvdata to driver
- fixed meson driver (renamed reset function)
- prototypes for newly exported functions in dw_hdmi.h were reordered

Changes from v1:
- Collected ACKs
- Separated bindings for controller and PHY
- Split driver into two parts - controller and PHY
- HDMI PHY driver now uses regmap for writes
- added defines for PHY registers and bits
- updated DT entries to accomodate new bindings
- removed already merged clock patch
- reworked first clock patch according to comments
- added new clock patch which changes NKMP formula
- split TCON patch in two, one for quirk and one for new compatible
- reworked patch which exports DW HDMI PHY functions:
  - remove "gen2" from some function names
  - removed parameter from dw_hdmi_phy_reset()
  - added address parameter to dw_hdmi_phy_i2c_set_addr()
- updated most of commit messages

Jernej Skrabec (12):
  clk: sunxi-ng: Mask nkmp factors when setting register
  clk: sunxi-ng: Change formula for NKMP PLLs
  drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a
  drm/bridge/synopsys: dw-hdmi: Export some PHY related functions
  drm/bridge/synopsys: dw-hdmi: don't clobber drvdata
  dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline
  drm/sun4i: Add has_channel_0 TCON quirk
  drm/sun4i: Add support for A83T second TCON
  drm/sun4i: Add support for A83T second DE2 mixer
  drm/sun4i: Implement A83T HDMI driver
  ARM: dts: sun8i: a83t: Add HDMI display pipeline
  ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

 .../bindings/display/sunxi/sun4i-drm.txt           | 197 +++++++++++++-
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts       |  25 ++
 arch/arm/boot/dts/sun8i-a83t.dtsi                  | 119 +++++++-
 drivers/clk/sunxi-ng/ccu_nkmp.c                    |  27 +-
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c          |  83 +++---
 drivers/gpu/drm/imx/dw_hdmi-imx.c                  |  13 +-
 drivers/gpu/drm/meson/meson_dw_hdmi.c              |  22 +-
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c             |  12 +-
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c        |  13 +-
 drivers/gpu/drm/sun4i/Kconfig                      |   9 +
 drivers/gpu/drm/sun4i/Makefile                     |   4 +
 drivers/gpu/drm/sun4i/sun4i_tcon.c                 |  46 +++-
 drivers/gpu/drm/sun4i/sun4i_tcon.h                 |   1 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c              | 181 ++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h              |  46 ++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c             | 302 +++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_mixer.c                |  11 +
 include/drm/bridge/dw_hdmi.h                       |  24 +-
 18 files changed, 1046 insertions(+), 89 deletions(-)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

-- 
2.15.1

[PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Jernej Skrabec]

Currently, if one of the factors isn't present, bit 0 gets always set to
1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
K is not specified, it's offset, width and shift is 0. Driver assumes
that lowest value possible is 1, otherwise we would get division by 0.
That situation causes that bit 0 is always set, which may change wanted
clock rate.

Fix that by masking every factor according to it's specified width.
Factors with width set to 0 won't have any influence to final register
value.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index e58c95787f94..a99068a08315 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -134,6 +134,7 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 			   unsigned long parent_rate)
 {
 	struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw);
+	u32 n_mask, k_mask, m_mask, p_mask;
 	struct _ccu_nkmp _nkmp;
 	unsigned long flags;
 	u32 reg;
@@ -149,18 +150,20 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(parent_rate, rate, &_nkmp);
 
+	n_mask = GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
+	k_mask = GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
+	m_mask = GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
+	p_mask = GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
+
 	spin_lock_irqsave(nkmp->common.lock, flags);
 
 	reg = readl(nkmp->common.base + nkmp->common.reg);
-	reg &= ~GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
-	reg &= ~GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
-	reg &= ~GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
-	reg &= ~GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
-
-	reg |= (_nkmp.n - nkmp->n.offset) << nkmp->n.shift;
-	reg |= (_nkmp.k - nkmp->k.offset) << nkmp->k.shift;
-	reg |= (_nkmp.m - nkmp->m.offset) << nkmp->m.shift;
-	reg |= ilog2(_nkmp.p) << nkmp->p.shift;
+	reg &= ~(n_mask | k_mask | m_mask | p_mask);
+
+	reg |= ((_nkmp.n - nkmp->n.offset) << nkmp->n.shift) & n_mask;
+	reg |= ((_nkmp.k - nkmp->k.offset) << nkmp->k.shift) & k_mask;
+	reg |= ((_nkmp.m - nkmp->m.offset) << nkmp->m.shift) & m_mask;
+	reg |= (ilog2(_nkmp.p) << nkmp->p.shift) & p_mask;
 
 	writel(reg, nkmp->common.base + nkmp->common.reg);
 
-- 
2.15.1

[PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Jernej Skrabec]

Currently, if one of the factors isn't present, bit 0 gets always set to
1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
K is not specified, it's offset, width and shift is 0. Driver assumes
that lowest value possible is 1, otherwise we would get division by 0.
That situation causes that bit 0 is always set, which may change wanted
clock rate.

Fix that by masking every factor according to it's specified width.
Factors with width set to 0 won't have any influence to final register
value.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index e58c95787f94..a99068a08315 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -134,6 +134,7 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 			   unsigned long parent_rate)
 {
 	struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw);
+	u32 n_mask, k_mask, m_mask, p_mask;
 	struct _ccu_nkmp _nkmp;
 	unsigned long flags;
 	u32 reg;
@@ -149,18 +150,20 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(parent_rate, rate, &_nkmp);
 
+	n_mask = GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
+	k_mask = GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
+	m_mask = GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
+	p_mask = GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
+
 	spin_lock_irqsave(nkmp->common.lock, flags);
 
 	reg = readl(nkmp->common.base + nkmp->common.reg);
-	reg &= ~GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
-	reg &= ~GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
-	reg &= ~GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
-	reg &= ~GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
-
-	reg |= (_nkmp.n - nkmp->n.offset) << nkmp->n.shift;
-	reg |= (_nkmp.k - nkmp->k.offset) << nkmp->k.shift;
-	reg |= (_nkmp.m - nkmp->m.offset) << nkmp->m.shift;
-	reg |= ilog2(_nkmp.p) << nkmp->p.shift;
+	reg &= ~(n_mask | k_mask | m_mask | p_mask);
+
+	reg |= ((_nkmp.n - nkmp->n.offset) << nkmp->n.shift) & n_mask;
+	reg |= ((_nkmp.k - nkmp->k.offset) << nkmp->k.shift) & k_mask;
+	reg |= ((_nkmp.m - nkmp->m.offset) << nkmp->m.shift) & m_mask;
+	reg |= (ilog2(_nkmp.p) << nkmp->p.shift) & p_mask;
 
 	writel(reg, nkmp->common.base + nkmp->common.reg);
 
-- 
2.15.1

[PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Jernej Skrabec]

Currently, if one of the factors isn't present, bit 0 gets always set to
1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
K is not specified, it's offset, width and shift is 0. Driver assumes
that lowest value possible is 1, otherwise we would get division by 0.
That situation causes that bit 0 is always set, which may change wanted
clock rate.

Fix that by masking every factor according to it's specified width.
Factors with width set to 0 won't have any influence to final register
value.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index e58c95787f94..a99068a08315 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -134,6 +134,7 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 			   unsigned long parent_rate)
 {
 	struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw);
+	u32 n_mask, k_mask, m_mask, p_mask;
 	struct _ccu_nkmp _nkmp;
 	unsigned long flags;
 	u32 reg;
@@ -149,18 +150,20 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(parent_rate, rate, &_nkmp);
 
+	n_mask = GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
+	k_mask = GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
+	m_mask = GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
+	p_mask = GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
+
 	spin_lock_irqsave(nkmp->common.lock, flags);
 
 	reg = readl(nkmp->common.base + nkmp->common.reg);
-	reg &= ~GENMASK(nkmp->n.width + nkmp->n.shift - 1, nkmp->n.shift);
-	reg &= ~GENMASK(nkmp->k.width + nkmp->k.shift - 1, nkmp->k.shift);
-	reg &= ~GENMASK(nkmp->m.width + nkmp->m.shift - 1, nkmp->m.shift);
-	reg &= ~GENMASK(nkmp->p.width + nkmp->p.shift - 1, nkmp->p.shift);
-
-	reg |= (_nkmp.n - nkmp->n.offset) << nkmp->n.shift;
-	reg |= (_nkmp.k - nkmp->k.offset) << nkmp->k.shift;
-	reg |= (_nkmp.m - nkmp->m.offset) << nkmp->m.shift;
-	reg |= ilog2(_nkmp.p) << nkmp->p.shift;
+	reg &= ~(n_mask | k_mask | m_mask | p_mask);
+
+	reg |= ((_nkmp.n - nkmp->n.offset) << nkmp->n.shift) & n_mask;
+	reg |= ((_nkmp.k - nkmp->k.offset) << nkmp->k.shift) & k_mask;
+	reg |= ((_nkmp.m - nkmp->m.offset) << nkmp->m.shift) & m_mask;
+	reg |= (ilog2(_nkmp.p) << nkmp->p.shift) & p_mask;
 
 	writel(reg, nkmp->common.base + nkmp->common.reg);
 
-- 
2.15.1

[PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Skrabec]

This commit changes formula from this:

Freq = (parent_freq * N * K) / (M * P)

to this:

Freq = (parent_freq / M) * N * K / P

This improves situation when N is in the range 1-255. PLL parent clock
is almost always 24 MHz, which means that for N >= 180 original formula
overflows and result becomes useless. Situation can be improved if M is
used as predivider as it can be seen in the second formula. That way at
least M > 1 is considered, but it still leaves small gap for wrong result
when M = 1 and N >= 180.

Using M as predivider shouldn't cause any issue, because it is in range
1-4 at most, so there is no or only minimal rounding error.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index a99068a08315..e6c996ad4483 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -33,7 +33,7 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
 				for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) {
 					unsigned long tmp_rate;
 
-					tmp_rate = parent * _n * _k / (_m * _p);
+					tmp_rate = (parent / _m) * _n * _k / _p;
 
 					if (tmp_rate > rate)
 						continue;
@@ -107,7 +107,7 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw,
 	p = reg >> nkmp->p.shift;
 	p &= (1 << nkmp->p.width) - 1;
 
-	return (parent_rate * n * k >> p) / m;
+	return (parent_rate / m) * n * k >> p;
 }
 
 static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -127,7 +127,7 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
 
-	return *parent_rate * _nkmp.n * _nkmp.k / (_nkmp.m * _nkmp.p);
+	return (*parent_rate / _nkmp.m) * _nkmp.n * _nkmp.k / _nkmp.p;
 }
 
 static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
-- 
2.15.1

[PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Skrabec]

This commit changes formula from this:

Freq = (parent_freq * N * K) / (M * P)

to this:

Freq = (parent_freq / M) * N * K / P

This improves situation when N is in the range 1-255. PLL parent clock
is almost always 24 MHz, which means that for N >= 180 original formula
overflows and result becomes useless. Situation can be improved if M is
used as predivider as it can be seen in the second formula. That way at
least M > 1 is considered, but it still leaves small gap for wrong result
when M = 1 and N >= 180.

Using M as predivider shouldn't cause any issue, because it is in range
1-4 at most, so there is no or only minimal rounding error.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index a99068a08315..e6c996ad4483 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -33,7 +33,7 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
 				for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) {
 					unsigned long tmp_rate;
 
-					tmp_rate = parent * _n * _k / (_m * _p);
+					tmp_rate = (parent / _m) * _n * _k / _p;
 
 					if (tmp_rate > rate)
 						continue;
@@ -107,7 +107,7 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw,
 	p = reg >> nkmp->p.shift;
 	p &= (1 << nkmp->p.width) - 1;
 
-	return (parent_rate * n * k >> p) / m;
+	return (parent_rate / m) * n * k >> p;
 }
 
 static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -127,7 +127,7 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
 
-	return *parent_rate * _nkmp.n * _nkmp.k / (_nkmp.m * _nkmp.p);
+	return (*parent_rate / _nkmp.m) * _nkmp.n * _nkmp.k / _nkmp.p;
 }
 
 static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
-- 
2.15.1

[PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Skrabec]

This commit changes formula from this:

Freq = (parent_freq * N * K) / (M * P)

to this:

Freq = (parent_freq / M) * N * K / P

This improves situation when N is in the range 1-255. PLL parent clock
is almost always 24 MHz, which means that for N >= 180 original formula
overflows and result becomes useless. Situation can be improved if M is
used as predivider as it can be seen in the second formula. That way at
least M > 1 is considered, but it still leaves small gap for wrong result
when M = 1 and N >= 180.

Using M as predivider shouldn't cause any issue, because it is in range
1-4 at most, so there is no or only minimal rounding error.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/clk/sunxi-ng/ccu_nkmp.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
index a99068a08315..e6c996ad4483 100644
--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
@@ -33,7 +33,7 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
 				for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) {
 					unsigned long tmp_rate;
 
-					tmp_rate = parent * _n * _k / (_m * _p);
+					tmp_rate = (parent / _m) * _n * _k / _p;
 
 					if (tmp_rate > rate)
 						continue;
@@ -107,7 +107,7 @@ static unsigned long ccu_nkmp_recalc_rate(struct clk_hw *hw,
 	p = reg >> nkmp->p.shift;
 	p &= (1 << nkmp->p.width) - 1;
 
-	return (parent_rate * n * k >> p) / m;
+	return (parent_rate / m) * n * k >> p;
 }
 
 static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
@@ -127,7 +127,7 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
 
 	ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
 
-	return *parent_rate * _nkmp.n * _nkmp.k / (_nkmp.m * _nkmp.p);
+	return (*parent_rate / _nkmp.m) * _nkmp.n * _nkmp.k / _nkmp.p;
 }
 
 static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
-- 
2.15.1

[PATCH v3 03/12] drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a

[Jernej Skrabec]

Allwinner SoCs have dw hdmi controller v1.32a which exhibits same
magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it.

Tests show that one iteration is enough.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a38db40ce990..7ca14d7325b5 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1634,9 +1634,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	 * then write one of the FC registers several times.
 	 *
 	 * The number of iterations matters and depends on the HDMI TX revision
-	 * (and possibly on the platform). So far only i.MX6Q (v1.30a) and
-	 * i.MX6DL (v1.31a) have been identified as needing the workaround, with
-	 * 4 and 1 iterations respectively.
+	 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL
+	 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified
+	 * as needing the workaround, with 4 iterations for v1.30a and 1
+	 * iteration for others.
 	 */
 
 	switch (hdmi->version) {
@@ -1644,6 +1645,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 		count = 4;
 		break;
 	case 0x131a:
+	case 0x132a:
 		count = 1;
 		break;
 	default:
-- 
2.15.1

[PATCH v3 03/12] drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a

[Jernej Skrabec]

Allwinner SoCs have dw hdmi controller v1.32a which exhibits same
magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it.

Tests show that one iteration is enough.

Acked-by: Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a38db40ce990..7ca14d7325b5 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1634,9 +1634,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	 * then write one of the FC registers several times.
 	 *
 	 * The number of iterations matters and depends on the HDMI TX revision
-	 * (and possibly on the platform). So far only i.MX6Q (v1.30a) and
-	 * i.MX6DL (v1.31a) have been identified as needing the workaround, with
-	 * 4 and 1 iterations respectively.
+	 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL
+	 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified
+	 * as needing the workaround, with 4 iterations for v1.30a and 1
+	 * iteration for others.
 	 */
 
 	switch (hdmi->version) {
@@ -1644,6 +1645,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 		count = 4;
 		break;
 	case 0x131a:
+	case 0x132a:
 		count = 1;
 		break;
 	default:
-- 
2.15.1

[PATCH v3 03/12] drm/bridge/synopsys: dw-hdmi: Enable workaround for v1.32a

[Jernej Skrabec]

Allwinner SoCs have dw hdmi controller v1.32a which exhibits same
magenta line issue as i.MX6Q and i.MX6DL. Enable workaround for it.

Tests show that one iteration is enough.

Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index a38db40ce990..7ca14d7325b5 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1634,9 +1634,10 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 	 * then write one of the FC registers several times.
 	 *
 	 * The number of iterations matters and depends on the HDMI TX revision
-	 * (and possibly on the platform). So far only i.MX6Q (v1.30a) and
-	 * i.MX6DL (v1.31a) have been identified as needing the workaround, with
-	 * 4 and 1 iterations respectively.
+	 * (and possibly on the platform). So far i.MX6Q (v1.30a), i.MX6DL
+	 * (v1.31a) and multiple Allwinner SoCs (v1.32a) have been identified
+	 * as needing the workaround, with 4 iterations for v1.30a and 1
+	 * iteration for others.
 	 */
 
 	switch (hdmi->version) {
@@ -1644,6 +1645,7 @@ static void dw_hdmi_clear_overflow(struct dw_hdmi *hdmi)
 		count = 4;
 		break;
 	case 0x131a:
+	case 0x132a:
 		count = 1;
 		break;
 	default:
-- 
2.15.1

[PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Jernej Skrabec]

Parts of PHY code could be useful also for custom PHYs. For example,
Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
with few additional memory mapped registers, so most of the Synopsys PHY
related code could be reused.

Functions exported here are actually not specific to Synopsys PHYs but
to DWC HDMI controller PHY interface. This means that even if the PHY is
completely custom, i.e. not designed by Synopsys, exported functions can
be useful.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
 drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
 include/drm/bridge/dw_hdmi.h              | 11 ++++++++
 3 files changed, 45 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7ca14d7325b5..7d80f4b56683 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SVSRET_MASK);
 }
 
-static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
 
-static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
 
 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
 {
@@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SELDIPIF_MASK);
 }
 
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
+{
+	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
+	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+	hdmi_phy_test_clear(hdmi, 1);
+	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+	hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
 {
 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
@@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
 	if (phy->has_svsret)
 		dw_hdmi_phy_enable_svsret(hdmi, 1);
 
-	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
-	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
-	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+	dw_hdmi_phy_reset(hdmi);
 
 	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
 
-	hdmi_phy_test_clear(hdmi, 1);
-	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
-		    HDMI_PHY_I2CM_SLAVE_ADDR);
-	hdmi_phy_test_clear(hdmi, 0);
+	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
 
 	/* Write to the PHY as configured by the platform */
 	if (pdata->configure_phy)
@@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
 	dw_hdmi_phy_power_off(hdmi);
 }
 
-static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
-						      void *data)
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data)
 {
 	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
 		connector_status_connected : connector_status_disconnected;
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
 
-static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
-				   bool force, bool disabled, bool rxsense)
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense)
 {
 	u8 old_mask = hdmi->phy_mask;
 
@@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
 	if (old_mask != hdmi->phy_mask)
 		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
 
-static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 {
 	/*
 	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
@@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
 		    HDMI_IH_MUTE_PHY_STAT0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
 
 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
 	.init = dw_hdmi_phy_init,
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 17de3afd98f6..e8c3ef8a94ce 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
 	}
 }
 
-static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
+static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
 	msleep(100);
 
 	/* Reset PHY 3 times in a row */
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
 
 	/* Temporary Disable VENC video stream */
 	if (priv->venc.hdmi_use_enci)
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 182f83283e24..f3f3f0e1b2d3 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
 
 /* PHY configuration */
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 			   unsigned char addr);
 
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data);
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense);
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
+
 #endif /* __IMX_HDMI_H__ */
-- 
2.15.1

[PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Jernej Skrabec]

Parts of PHY code could be useful also for custom PHYs. For example,
Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
with few additional memory mapped registers, so most of the Synopsys PHY
related code could be reused.

Functions exported here are actually not specific to Synopsys PHYs but
to DWC HDMI controller PHY interface. This means that even if the PHY is
completely custom, i.e. not designed by Synopsys, exported functions can
be useful.

Reviewed-by: Laurent Pinchart <laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
 drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
 include/drm/bridge/dw_hdmi.h              | 11 ++++++++
 3 files changed, 45 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7ca14d7325b5..7d80f4b56683 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SVSRET_MASK);
 }
 
-static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
 
-static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
 
 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
 {
@@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SELDIPIF_MASK);
 }
 
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
+{
+	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
+	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+	hdmi_phy_test_clear(hdmi, 1);
+	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+	hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
 {
 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
@@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
 	if (phy->has_svsret)
 		dw_hdmi_phy_enable_svsret(hdmi, 1);
 
-	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
-	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
-	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+	dw_hdmi_phy_reset(hdmi);
 
 	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
 
-	hdmi_phy_test_clear(hdmi, 1);
-	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
-		    HDMI_PHY_I2CM_SLAVE_ADDR);
-	hdmi_phy_test_clear(hdmi, 0);
+	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
 
 	/* Write to the PHY as configured by the platform */
 	if (pdata->configure_phy)
@@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
 	dw_hdmi_phy_power_off(hdmi);
 }
 
-static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
-						      void *data)
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data)
 {
 	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
 		connector_status_connected : connector_status_disconnected;
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
 
-static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
-				   bool force, bool disabled, bool rxsense)
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense)
 {
 	u8 old_mask = hdmi->phy_mask;
 
@@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
 	if (old_mask != hdmi->phy_mask)
 		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
 
-static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 {
 	/*
 	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
@@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
 		    HDMI_IH_MUTE_PHY_STAT0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
 
 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
 	.init = dw_hdmi_phy_init,
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 17de3afd98f6..e8c3ef8a94ce 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
 	}
 }
 
-static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
+static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
 	msleep(100);
 
 	/* Reset PHY 3 times in a row */
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
 
 	/* Temporary Disable VENC video stream */
 	if (priv->venc.hdmi_use_enci)
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 182f83283e24..f3f3f0e1b2d3 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
 
 /* PHY configuration */
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 			   unsigned char addr);
 
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data);
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense);
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
+
 #endif /* __IMX_HDMI_H__ */
-- 
2.15.1

[PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Jernej Skrabec]

Parts of PHY code could be useful also for custom PHYs. For example,
Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
with few additional memory mapped registers, so most of the Synopsys PHY
related code could be reused.

Functions exported here are actually not specific to Synopsys PHYs but
to DWC HDMI controller PHY interface. This means that even if the PHY is
completely custom, i.e. not designed by Synopsys, exported functions can
be useful.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
 drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
 include/drm/bridge/dw_hdmi.h              | 11 ++++++++
 3 files changed, 45 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7ca14d7325b5..7d80f4b56683 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SVSRET_MASK);
 }
 
-static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
 
-static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
 {
 	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
 			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
 
 static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
 {
@@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
 			 HDMI_PHY_CONF0_SELDIPIF_MASK);
 }
 
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
+{
+	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
+	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
+	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
+
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
+{
+	hdmi_phy_test_clear(hdmi, 1);
+	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
+	hdmi_phy_test_clear(hdmi, 0);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
+
 static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
 {
 	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
@@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
 	if (phy->has_svsret)
 		dw_hdmi_phy_enable_svsret(hdmi, 1);
 
-	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
-	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
-	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
+	dw_hdmi_phy_reset(hdmi);
 
 	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
 
-	hdmi_phy_test_clear(hdmi, 1);
-	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
-		    HDMI_PHY_I2CM_SLAVE_ADDR);
-	hdmi_phy_test_clear(hdmi, 0);
+	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
 
 	/* Write to the PHY as configured by the platform */
 	if (pdata->configure_phy)
@@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
 	dw_hdmi_phy_power_off(hdmi);
 }
 
-static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
-						      void *data)
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data)
 {
 	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
 		connector_status_connected : connector_status_disconnected;
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
 
-static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
-				   bool force, bool disabled, bool rxsense)
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense)
 {
 	u8 old_mask = hdmi->phy_mask;
 
@@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
 	if (old_mask != hdmi->phy_mask)
 		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
 
-static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 {
 	/*
 	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
@@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
 	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
 		    HDMI_IH_MUTE_PHY_STAT0);
 }
+EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
 
 static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
 	.init = dw_hdmi_phy_init,
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 17de3afd98f6..e8c3ef8a94ce 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
 	}
 }
 
-static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
+static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
 {
 	struct meson_drm *priv = dw_hdmi->priv;
 
@@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
 	msleep(100);
 
 	/* Reset PHY 3 times in a row */
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
-	dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
+	meson_dw_hdmi_phy_reset(dw_hdmi);
 
 	/* Temporary Disable VENC video stream */
 	if (priv->venc.hdmi_use_enci)
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 182f83283e24..f3f3f0e1b2d3 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
 void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
 
 /* PHY configuration */
+void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
 void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 			   unsigned char addr);
 
+void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
+void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
+
+enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
+					       void *data);
+void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
+			    bool force, bool disabled, bool rxsense);
+void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
+
 #endif /* __IMX_HDMI_H__ */
-- 
2.15.1

[PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Jernej Skrabec]

dw_hdmi shouldn't set drvdata since some drivers might need to store
it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
instead to store it in drvdata. This way drivers are responsible to
store and pass structure when needed.

Idea was taken from the following commit:
8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")

Cc: p.zabel@pengutronix.de
Cc: narmstrong@baylibre.com
Cc: Laurent.pinchart@ideasonboard.com
Cc: hjc@rock-chips.com
Cc: heiko@sntech.de
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
 drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
 drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
 include/drm/bridge/dw_hdmi.h                | 13 ++++++------
 6 files changed, 60 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7d80f4b56683..f9802399cc0d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2543,8 +2543,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (hdmi->i2c)
 		dw_hdmi_i2c_init(hdmi);
 
-	platform_set_drvdata(pdev, hdmi);
-
 	return hdmi;
 
 err_iahb:
@@ -2594,25 +2592,23 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 /* -----------------------------------------------------------------------------
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	drm_bridge_add(&hdmi->bridge);
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
 
-void dw_hdmi_remove(struct platform_device *pdev)
+void dw_hdmi_remove(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
-
 	drm_bridge_remove(&hdmi->bridge);
 
 	__dw_hdmi_remove(hdmi);
@@ -2622,31 +2618,30 @@ EXPORT_SYMBOL_GPL(dw_hdmi_remove);
 /* -----------------------------------------------------------------------------
  * Bind/unbind API, used from platforms based on the component framework.
  */
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 	int ret;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
 	if (ret) {
-		dw_hdmi_remove(pdev);
+		dw_hdmi_remove(hdmi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
+		return ERR_PTR(ret);
 	}
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
 
-void dw_hdmi_unbind(struct device *dev)
+void dw_hdmi_unbind(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
-
 	__dw_hdmi_remove(hdmi);
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index b62763aa8706..fe6becdcc29e 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -25,6 +25,7 @@
 struct imx_hdmi {
 	struct device *dev;
 	struct drm_encoder encoder;
+	struct dw_hdmi *hdmi;
 	struct regmap *regmap;
 };
 
@@ -239,14 +240,18 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -254,7 +259,9 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct imx_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_imx_ops = {
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index e8c3ef8a94ce..d49af17310c9 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -140,6 +140,7 @@ struct meson_dw_hdmi {
 	struct clk *venci_clk;
 	struct regulator *hdmi_supply;
 	u32 irq_stat;
+	struct dw_hdmi *hdmi;
 };
 #define encoder_to_meson_dw_hdmi(x) \
 	container_of(x, struct meson_dw_hdmi, encoder)
@@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
 	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
 
-	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
-	if (ret)
-		return ret;
+	platform_set_drvdata(pdev, meson_dw_hdmi);
+
+	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
+					   &meson_dw_hdmi->dw_plat_data);
+	if (IS_ERR(meson_dw_hdmi->hdmi))
+		return PTR_ERR(meson_dw_hdmi->hdmi);
 
 	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
 
@@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
 				   void *data)
 {
-	dw_hdmi_unbind(dev);
+	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
 }
 
 static const struct component_ops meson_dw_hdmi_ops = {
diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
index dc85b53d58ef..3bebc6821e9c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
@@ -68,12 +68,20 @@ static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
 
 static int rcar_dw_hdmi_probe(struct platform_device *pdev)
 {
-	return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	struct dw_hdmi *hdmi;
+
+	hdmi = dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	if (IS_ERR(hdmi))
+		return PTR_ERR(hdmi);
+
+	platform_set_drvdata(pdev, hdmi);
 }
 
 static int rcar_dw_hdmi_remove(struct platform_device *pdev)
 {
-	dw_hdmi_remove(pdev);
+	struct dw_hdmi *hdmi = platform_get_drvdata(dev);
+
+	dw_hdmi_remove(hdmi);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 1eb02a82fd91..3574b0ae2ad1 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -48,6 +48,7 @@ struct rockchip_hdmi {
 	const struct rockchip_hdmi_chip_data *chip_data;
 	struct clk *vpll_clk;
 	struct clk *grf_clk;
+	struct dw_hdmi *hdmi;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -377,14 +378,18 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -392,7 +397,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 				    void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index f3f3f0e1b2d3..dd2a8cf7d20b 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
 			     unsigned long mpixelclock);
 };
 
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data);
-void dw_hdmi_remove(struct platform_device *pdev);
-void dw_hdmi_unbind(struct device *dev);
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data);
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data);
+void dw_hdmi_remove(struct dw_hdmi *hdmi);
+void dw_hdmi_unbind(struct dw_hdmi *hdmi);
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data);
 
 void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
 
-- 
2.15.1

[PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Jernej Skrabec]

dw_hdmi shouldn't set drvdata since some drivers might need to store
it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
instead to store it in drvdata. This way drivers are responsible to
store and pass structure when needed.

Idea was taken from the following commit:
8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")

Cc: p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org
Cc: narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org
Cc: Laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org
Cc: hjc-TNX95d0MmH7DzftRWevZcw@public.gmane.org
Cc: heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org
Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
 drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
 drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
 include/drm/bridge/dw_hdmi.h                | 13 ++++++------
 6 files changed, 60 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7d80f4b56683..f9802399cc0d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2543,8 +2543,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (hdmi->i2c)
 		dw_hdmi_i2c_init(hdmi);
 
-	platform_set_drvdata(pdev, hdmi);
-
 	return hdmi;
 
 err_iahb:
@@ -2594,25 +2592,23 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 /* -----------------------------------------------------------------------------
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	drm_bridge_add(&hdmi->bridge);
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
 
-void dw_hdmi_remove(struct platform_device *pdev)
+void dw_hdmi_remove(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
-
 	drm_bridge_remove(&hdmi->bridge);
 
 	__dw_hdmi_remove(hdmi);
@@ -2622,31 +2618,30 @@ EXPORT_SYMBOL_GPL(dw_hdmi_remove);
 /* -----------------------------------------------------------------------------
  * Bind/unbind API, used from platforms based on the component framework.
  */
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 	int ret;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
 	if (ret) {
-		dw_hdmi_remove(pdev);
+		dw_hdmi_remove(hdmi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
+		return ERR_PTR(ret);
 	}
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
 
-void dw_hdmi_unbind(struct device *dev)
+void dw_hdmi_unbind(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
-
 	__dw_hdmi_remove(hdmi);
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index b62763aa8706..fe6becdcc29e 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -25,6 +25,7 @@
 struct imx_hdmi {
 	struct device *dev;
 	struct drm_encoder encoder;
+	struct dw_hdmi *hdmi;
 	struct regmap *regmap;
 };
 
@@ -239,14 +240,18 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -254,7 +259,9 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct imx_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_imx_ops = {
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index e8c3ef8a94ce..d49af17310c9 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -140,6 +140,7 @@ struct meson_dw_hdmi {
 	struct clk *venci_clk;
 	struct regulator *hdmi_supply;
 	u32 irq_stat;
+	struct dw_hdmi *hdmi;
 };
 #define encoder_to_meson_dw_hdmi(x) \
 	container_of(x, struct meson_dw_hdmi, encoder)
@@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
 	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
 
-	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
-	if (ret)
-		return ret;
+	platform_set_drvdata(pdev, meson_dw_hdmi);
+
+	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
+					   &meson_dw_hdmi->dw_plat_data);
+	if (IS_ERR(meson_dw_hdmi->hdmi))
+		return PTR_ERR(meson_dw_hdmi->hdmi);
 
 	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
 
@@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
 				   void *data)
 {
-	dw_hdmi_unbind(dev);
+	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
 }
 
 static const struct component_ops meson_dw_hdmi_ops = {
diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
index dc85b53d58ef..3bebc6821e9c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
@@ -68,12 +68,20 @@ static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
 
 static int rcar_dw_hdmi_probe(struct platform_device *pdev)
 {
-	return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	struct dw_hdmi *hdmi;
+
+	hdmi = dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	if (IS_ERR(hdmi))
+		return PTR_ERR(hdmi);
+
+	platform_set_drvdata(pdev, hdmi);
 }
 
 static int rcar_dw_hdmi_remove(struct platform_device *pdev)
 {
-	dw_hdmi_remove(pdev);
+	struct dw_hdmi *hdmi = platform_get_drvdata(dev);
+
+	dw_hdmi_remove(hdmi);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 1eb02a82fd91..3574b0ae2ad1 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -48,6 +48,7 @@ struct rockchip_hdmi {
 	const struct rockchip_hdmi_chip_data *chip_data;
 	struct clk *vpll_clk;
 	struct clk *grf_clk;
+	struct dw_hdmi *hdmi;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -377,14 +378,18 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -392,7 +397,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 				    void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index f3f3f0e1b2d3..dd2a8cf7d20b 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
 			     unsigned long mpixelclock);
 };
 
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data);
-void dw_hdmi_remove(struct platform_device *pdev);
-void dw_hdmi_unbind(struct device *dev);
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data);
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data);
+void dw_hdmi_remove(struct dw_hdmi *hdmi);
+void dw_hdmi_unbind(struct dw_hdmi *hdmi);
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data);
 
 void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
 
-- 
2.15.1

[PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Jernej Skrabec]

dw_hdmi shouldn't set drvdata since some drivers might need to store
it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
instead to store it in drvdata. This way drivers are responsible to
store and pass structure when needed.

Idea was taken from the following commit:
8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")

Cc: p.zabel at pengutronix.de
Cc: narmstrong at baylibre.com
Cc: Laurent.pinchart at ideasonboard.com
Cc: hjc at rock-chips.com
Cc: heiko at sntech.de
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
 drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
 drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
 drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
 include/drm/bridge/dw_hdmi.h                | 13 ++++++------
 6 files changed, 60 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 7d80f4b56683..f9802399cc0d 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2543,8 +2543,6 @@ __dw_hdmi_probe(struct platform_device *pdev,
 	if (hdmi->i2c)
 		dw_hdmi_i2c_init(hdmi);
 
-	platform_set_drvdata(pdev, hdmi);
-
 	return hdmi;
 
 err_iahb:
@@ -2594,25 +2592,23 @@ static void __dw_hdmi_remove(struct dw_hdmi *hdmi)
 /* -----------------------------------------------------------------------------
  * Probe/remove API, used from platforms based on the DRM bridge API.
  */
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	drm_bridge_add(&hdmi->bridge);
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_probe);
 
-void dw_hdmi_remove(struct platform_device *pdev)
+void dw_hdmi_remove(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = platform_get_drvdata(pdev);
-
 	drm_bridge_remove(&hdmi->bridge);
 
 	__dw_hdmi_remove(hdmi);
@@ -2622,31 +2618,30 @@ EXPORT_SYMBOL_GPL(dw_hdmi_remove);
 /* -----------------------------------------------------------------------------
  * Bind/unbind API, used from platforms based on the component framework.
  */
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data)
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data)
 {
 	struct dw_hdmi *hdmi;
 	int ret;
 
 	hdmi = __dw_hdmi_probe(pdev, plat_data);
 	if (IS_ERR(hdmi))
-		return PTR_ERR(hdmi);
+		return hdmi;
 
 	ret = drm_bridge_attach(encoder, &hdmi->bridge, NULL);
 	if (ret) {
-		dw_hdmi_remove(pdev);
+		dw_hdmi_remove(hdmi);
 		DRM_ERROR("Failed to initialize bridge with drm\n");
-		return ret;
+		return ERR_PTR(ret);
 	}
 
-	return 0;
+	return hdmi;
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_bind);
 
-void dw_hdmi_unbind(struct device *dev)
+void dw_hdmi_unbind(struct dw_hdmi *hdmi)
 {
-	struct dw_hdmi *hdmi = dev_get_drvdata(dev);
-
 	__dw_hdmi_remove(hdmi);
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_unbind);
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index b62763aa8706..fe6becdcc29e 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -25,6 +25,7 @@
 struct imx_hdmi {
 	struct device *dev;
 	struct drm_encoder encoder;
+	struct dw_hdmi *hdmi;
 	struct regmap *regmap;
 };
 
@@ -239,14 +240,18 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -254,7 +259,9 @@ static int dw_hdmi_imx_bind(struct device *dev, struct device *master,
 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct imx_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_imx_ops = {
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index e8c3ef8a94ce..d49af17310c9 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -140,6 +140,7 @@ struct meson_dw_hdmi {
 	struct clk *venci_clk;
 	struct regulator *hdmi_supply;
 	u32 irq_stat;
+	struct dw_hdmi *hdmi;
 };
 #define encoder_to_meson_dw_hdmi(x) \
 	container_of(x, struct meson_dw_hdmi, encoder)
@@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
 	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
 
-	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
-	if (ret)
-		return ret;
+	platform_set_drvdata(pdev, meson_dw_hdmi);
+
+	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
+					   &meson_dw_hdmi->dw_plat_data);
+	if (IS_ERR(meson_dw_hdmi->hdmi))
+		return PTR_ERR(meson_dw_hdmi->hdmi);
 
 	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
 
@@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
 static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
 				   void *data)
 {
-	dw_hdmi_unbind(dev);
+	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
 }
 
 static const struct component_ops meson_dw_hdmi_ops = {
diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
index dc85b53d58ef..3bebc6821e9c 100644
--- a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
+++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
@@ -68,12 +68,20 @@ static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = {
 
 static int rcar_dw_hdmi_probe(struct platform_device *pdev)
 {
-	return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	struct dw_hdmi *hdmi;
+
+	hdmi = dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data);
+	if (IS_ERR(hdmi))
+		return PTR_ERR(hdmi);
+
+	platform_set_drvdata(pdev, hdmi);
 }
 
 static int rcar_dw_hdmi_remove(struct platform_device *pdev)
 {
-	dw_hdmi_remove(pdev);
+	struct dw_hdmi *hdmi = platform_get_drvdata(dev);
+
+	dw_hdmi_remove(hdmi);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
index 1eb02a82fd91..3574b0ae2ad1 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c
@@ -48,6 +48,7 @@ struct rockchip_hdmi {
 	const struct rockchip_hdmi_chip_data *chip_data;
 	struct clk *vpll_clk;
 	struct clk *grf_clk;
+	struct dw_hdmi *hdmi;
 };
 
 #define to_rockchip_hdmi(x)	container_of(x, struct rockchip_hdmi, x)
@@ -377,14 +378,18 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 	drm_encoder_init(drm, encoder, &dw_hdmi_rockchip_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);
 
-	ret = dw_hdmi_bind(pdev, encoder, plat_data);
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
 
 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
-	if (ret)
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
 		drm_encoder_cleanup(encoder);
+	}
 
 	return ret;
 }
@@ -392,7 +397,9 @@ static int dw_hdmi_rockchip_bind(struct device *dev, struct device *master,
 static void dw_hdmi_rockchip_unbind(struct device *dev, struct device *master,
 				    void *data)
 {
-	return dw_hdmi_unbind(dev);
+	struct rockchip_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
 }
 
 static const struct component_ops dw_hdmi_rockchip_ops = {
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index f3f3f0e1b2d3..dd2a8cf7d20b 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
 			     unsigned long mpixelclock);
 };
 
-int dw_hdmi_probe(struct platform_device *pdev,
-		  const struct dw_hdmi_plat_data *plat_data);
-void dw_hdmi_remove(struct platform_device *pdev);
-void dw_hdmi_unbind(struct device *dev);
-int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
-		 const struct dw_hdmi_plat_data *plat_data);
+struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
+			      const struct dw_hdmi_plat_data *plat_data);
+void dw_hdmi_remove(struct dw_hdmi *hdmi);
+void dw_hdmi_unbind(struct dw_hdmi *hdmi);
+struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
+			     struct drm_encoder *encoder,
+			     const struct dw_hdmi_plat_data *plat_data);
 
 void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
 
-- 
2.15.1

[PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Skrabec]

This commit adds all necessary compatibles and descriptions needed to
implement A83T HDMI pipeline.

Mixer is already properly described, so only compatible is added.

However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
contrary to all TCONs currently described. Because of that, TCON
documentation is extended.

A83T features Synopsys DW HDMI controller with a custom PHY which looks
like Synopsys Gen2 PHY with few additions. Since there is no
documentation, needed properties were found out through experimentation
and reading BSP code.

At the end, example is added for newer SoCs, which feature DE2 and DW
HDMI.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 .../bindings/display/sunxi/sun4i-drm.txt           | 197 ++++++++++++++++++++-
 1 file changed, 190 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index cd626ee1147a..4fb380f3e53d 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -64,6 +64,52 @@ Required properties:
     first port should be the input endpoint. The second should be the
     output, usually to an HDMI connector.
 
+DWC HDMI TX Encoder
+-------------------
+
+The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
+with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
+
+These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
+Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
+following device-specific properties.
+
+Required properties:
+
+  - compatible: value must be one of:
+    * "allwinner,sun8i-a83t-dw-hdmi"
+  - reg: base address and size of memory-mapped region
+  - reg-io-width: See dw_hdmi.txt. Shall be 1.
+  - interrupts: HDMI interrupt number
+  - clocks: phandles to the clocks feeding the HDMI encoder
+    * iahb: the HDMI bus clock
+    * isfr: the HDMI register clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller
+  - reset-names: must be "ctrl"
+  - phys: phandle to the DWC HDMI PHY
+  - phy-names: must be "phy"
+
+  - ports: A ports node with endpoint definitions as defined in
+    Documentation/devicetree/bindings/media/video-interfaces.txt. The
+    first port should be the input endpoint. The second should be the
+    output, usually to an HDMI connector.
+
+DWC HDMI PHY
+------------
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun8i-a83t-hdmi-phy
+  - reg: base address and size of memory-mapped region
+  - clocks: phandles to the clocks feeding the HDMI PHY
+    * bus: the HDMI PHY interface clock
+    * mod: the HDMI PHY module clock
+    * tmds: TMDS clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller driving the PHY
+  - reset-names: must be "phy"
+
 TV Encoder
 ----------
 
@@ -94,24 +140,23 @@ Required properties:
    * allwinner,sun7i-a20-tcon
    * allwinner,sun8i-a33-tcon
    * allwinner,sun8i-a83t-tcon-lcd
+   * allwinner,sun8i-a83t-tcon-tv
    * allwinner,sun8i-v3s-tcon
  - reg: base address and size of memory-mapped region
  - interrupts: interrupt associated to this IP
- - clocks: phandles to the clocks feeding the TCON. Three are needed:
+ - clocks: phandles to the clocks feeding the TCON. One is needed:
    - 'ahb': the interface clocks
-   - 'tcon-ch0': The clock driving the TCON channel 0
  - resets: phandles to the reset controllers driving the encoder
    - "lcd": the reset line for the TCON channel 0
 
  - clock-names: the clock names mentioned above
  - reset-names: the reset names mentioned above
- - clock-output-names: Name of the pixel clock created
 
 - ports: A ports node with endpoint definitions as defined in
   Documentation/devicetree/bindings/media/video-interfaces.txt. The
   first port should be the input endpoint, the second one the output
 
-  The output may have multiple endpoints. The TCON has two channels,
+  The output may have multiple endpoints. TCON can have two channels,
   usually with the first channel being used for the panels interfaces
   (RGB, LVDS, etc.), and the second being used for the outputs that
   require another controller (TV Encoder, HDMI, etc.). The endpoints
@@ -119,11 +164,16 @@ Required properties:
   channel the endpoint is associated to. If that property is not
   present, the endpoint number will be used as the channel number.
 
+When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
+more clocks are needed:
+   - 'tcon-ch0': The clock driving the TCON channel 0
+   - clock-output-names: Name of the pixel clock created
+
 On SoCs other than the A33 and V3s, there is one more clock required:
    - 'tcon-ch1': The clock driving the TCON channel 1
 
-On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
-need one more reset line:
+When TCON support LVDS (all TCONs except TV TCON on A83T and those found
+in A13, H3, H5 and V3s SoCs), you need one more reset line:
    - 'lvds': The reset line driving the LVDS logic
 
 And on the A23, A31, A31s and A33, you need one more clock line:
@@ -226,6 +276,7 @@ supported.
 Required properties:
   - compatible: value must be one of:
     * allwinner,sun8i-a83t-de2-mixer-0
+    * allwinner,sun8i-a83t-de2-mixer-1
     * allwinner,sun8i-v3s-de2-mixer
   - reg: base address and size of the memory-mapped region.
   - clocks: phandles to the clocks feeding the mixer
@@ -261,7 +312,7 @@ Required properties:
   - allwinner,pipelines: list of phandle to the display engine
     frontends (DE 1.0) or mixers (DE 2.0) available.
 
-Example:
+Example 1:
 
 panel: panel {
 	compatible = "olimex,lcd-olinuxino-43-ts";
@@ -460,3 +511,135 @@ display-engine {
 	compatible = "allwinner,sun5i-a13-display-engine";
 	allwinner,pipelines = <&fe0>;
 };
+
+Example 2:
+
+connector {
+	compatible = "hdmi-connector";
+	type = "a";
+
+	port {
+		hdmi_con_in: endpoint {
+			remote-endpoint = <&hdmi_out_con>;
+		};
+	};
+};
+
+de: display-engine {
+	compatible = "allwinner,sun8i-a83t-display-engine";
+	allwinner,pipelines = <&mixer1>;
+};
+
+mixer1: mixer@1200000 {
+	compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+	reg = <0x01200000 0x100000>;
+	clocks = <&display_clocks CLK_BUS_MIXER1>,
+		 <&display_clocks CLK_MIXER1>;
+	clock-names = "bus",
+		      "mod";
+	resets = <&display_clocks RST_WB>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mixer1_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			mixer1_out_tcon1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_in_mixer1>;
+			};
+		};
+	};
+};
+
+tcon1: lcd-controller@1c0d000 {
+	compatible = "allwinner,sun8i-a83t-tcon-tv";
+	reg = <0x01c0d000 0x1000>;
+	interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+	clock-names = "ahb", "tcon-ch1";
+	resets = <&ccu RST_BUS_TCON1>;
+	reset-names = "lcd";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		tcon1_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			tcon1_in_mixer1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&mixer1_out_tcon1>;
+			};
+		};
+
+		tcon1_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			tcon1_out_hdmi: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&hdmi_in_tcon1>;
+			};
+		};
+	};
+};
+
+hdmi: hdmi@1ee0000 {
+	compatible = "allwinner,sun8i-a83t-dw-hdmi";
+	reg = <0x01ee0000 0x10000>;
+	reg-io-width = <1>;
+	interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+	clock-names = "iahb", "isfr";
+	resets = <&ccu RST_BUS_HDMI1>;
+	reset-names = "ctrl";
+	phys = <&hdmi_phy>;
+	phy-names = "hdmi-phy";
+	status = "disabled";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hdmi_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			hdmi_in_tcon1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_out_hdmi>;
+			};
+		};
+
+		hdmi_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			hdmi_out_con: endpoint {
+				remote-endpoint = <&hdmi_con_in>;
+			};
+		};
+	};
+};
+
+hdmi_phy: hdmi-phy@1ef0000 {
+	compatible = "allwinner,sun8i-a83t-hdmi-phy";
+	reg = <0x01ef0000 0x10000>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+		 <&ccu CLK_HDMI>;
+	clock-names = "bus", "mod", "tmds";
+	resets = <&ccu RST_BUS_HDMI0>;
+	reset-names = "phy";
+	#phy-cells = <0>;
+};
-- 
2.15.1

[PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Skrabec]

This commit adds all necessary compatibles and descriptions needed to
implement A83T HDMI pipeline.

Mixer is already properly described, so only compatible is added.

However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
contrary to all TCONs currently described. Because of that, TCON
documentation is extended.

A83T features Synopsys DW HDMI controller with a custom PHY which looks
like Synopsys Gen2 PHY with few additions. Since there is no
documentation, needed properties were found out through experimentation
and reading BSP code.

At the end, example is added for newer SoCs, which feature DE2 and DW
HDMI.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 .../bindings/display/sunxi/sun4i-drm.txt           | 197 ++++++++++++++++++++-
 1 file changed, 190 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index cd626ee1147a..4fb380f3e53d 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -64,6 +64,52 @@ Required properties:
     first port should be the input endpoint. The second should be the
     output, usually to an HDMI connector.
 
+DWC HDMI TX Encoder
+-------------------
+
+The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
+with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
+
+These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
+Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
+following device-specific properties.
+
+Required properties:
+
+  - compatible: value must be one of:
+    * "allwinner,sun8i-a83t-dw-hdmi"
+  - reg: base address and size of memory-mapped region
+  - reg-io-width: See dw_hdmi.txt. Shall be 1.
+  - interrupts: HDMI interrupt number
+  - clocks: phandles to the clocks feeding the HDMI encoder
+    * iahb: the HDMI bus clock
+    * isfr: the HDMI register clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller
+  - reset-names: must be "ctrl"
+  - phys: phandle to the DWC HDMI PHY
+  - phy-names: must be "phy"
+
+  - ports: A ports node with endpoint definitions as defined in
+    Documentation/devicetree/bindings/media/video-interfaces.txt. The
+    first port should be the input endpoint. The second should be the
+    output, usually to an HDMI connector.
+
+DWC HDMI PHY
+------------
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun8i-a83t-hdmi-phy
+  - reg: base address and size of memory-mapped region
+  - clocks: phandles to the clocks feeding the HDMI PHY
+    * bus: the HDMI PHY interface clock
+    * mod: the HDMI PHY module clock
+    * tmds: TMDS clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller driving the PHY
+  - reset-names: must be "phy"
+
 TV Encoder
 ----------
 
@@ -94,24 +140,23 @@ Required properties:
    * allwinner,sun7i-a20-tcon
    * allwinner,sun8i-a33-tcon
    * allwinner,sun8i-a83t-tcon-lcd
+   * allwinner,sun8i-a83t-tcon-tv
    * allwinner,sun8i-v3s-tcon
  - reg: base address and size of memory-mapped region
  - interrupts: interrupt associated to this IP
- - clocks: phandles to the clocks feeding the TCON. Three are needed:
+ - clocks: phandles to the clocks feeding the TCON. One is needed:
    - 'ahb': the interface clocks
-   - 'tcon-ch0': The clock driving the TCON channel 0
  - resets: phandles to the reset controllers driving the encoder
    - "lcd": the reset line for the TCON channel 0
 
  - clock-names: the clock names mentioned above
  - reset-names: the reset names mentioned above
- - clock-output-names: Name of the pixel clock created
 
 - ports: A ports node with endpoint definitions as defined in
   Documentation/devicetree/bindings/media/video-interfaces.txt. The
   first port should be the input endpoint, the second one the output
 
-  The output may have multiple endpoints. The TCON has two channels,
+  The output may have multiple endpoints. TCON can have two channels,
   usually with the first channel being used for the panels interfaces
   (RGB, LVDS, etc.), and the second being used for the outputs that
   require another controller (TV Encoder, HDMI, etc.). The endpoints
@@ -119,11 +164,16 @@ Required properties:
   channel the endpoint is associated to. If that property is not
   present, the endpoint number will be used as the channel number.
 
+When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
+more clocks are needed:
+   - 'tcon-ch0': The clock driving the TCON channel 0
+   - clock-output-names: Name of the pixel clock created
+
 On SoCs other than the A33 and V3s, there is one more clock required:
    - 'tcon-ch1': The clock driving the TCON channel 1
 
-On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
-need one more reset line:
+When TCON support LVDS (all TCONs except TV TCON on A83T and those found
+in A13, H3, H5 and V3s SoCs), you need one more reset line:
    - 'lvds': The reset line driving the LVDS logic
 
 And on the A23, A31, A31s and A33, you need one more clock line:
@@ -226,6 +276,7 @@ supported.
 Required properties:
   - compatible: value must be one of:
     * allwinner,sun8i-a83t-de2-mixer-0
+    * allwinner,sun8i-a83t-de2-mixer-1
     * allwinner,sun8i-v3s-de2-mixer
   - reg: base address and size of the memory-mapped region.
   - clocks: phandles to the clocks feeding the mixer
@@ -261,7 +312,7 @@ Required properties:
   - allwinner,pipelines: list of phandle to the display engine
     frontends (DE 1.0) or mixers (DE 2.0) available.
 
-Example:
+Example 1:
 
 panel: panel {
 	compatible = "olimex,lcd-olinuxino-43-ts";
@@ -460,3 +511,135 @@ display-engine {
 	compatible = "allwinner,sun5i-a13-display-engine";
 	allwinner,pipelines = <&fe0>;
 };
+
+Example 2:
+
+connector {
+	compatible = "hdmi-connector";
+	type = "a";
+
+	port {
+		hdmi_con_in: endpoint {
+			remote-endpoint = <&hdmi_out_con>;
+		};
+	};
+};
+
+de: display-engine {
+	compatible = "allwinner,sun8i-a83t-display-engine";
+	allwinner,pipelines = <&mixer1>;
+};
+
+mixer1: mixer@1200000 {
+	compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+	reg = <0x01200000 0x100000>;
+	clocks = <&display_clocks CLK_BUS_MIXER1>,
+		 <&display_clocks CLK_MIXER1>;
+	clock-names = "bus",
+		      "mod";
+	resets = <&display_clocks RST_WB>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mixer1_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			mixer1_out_tcon1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_in_mixer1>;
+			};
+		};
+	};
+};
+
+tcon1: lcd-controller@1c0d000 {
+	compatible = "allwinner,sun8i-a83t-tcon-tv";
+	reg = <0x01c0d000 0x1000>;
+	interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+	clock-names = "ahb", "tcon-ch1";
+	resets = <&ccu RST_BUS_TCON1>;
+	reset-names = "lcd";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		tcon1_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			tcon1_in_mixer1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&mixer1_out_tcon1>;
+			};
+		};
+
+		tcon1_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			tcon1_out_hdmi: endpoint@1 {
+				reg = <1>;
+				remote-endpoint = <&hdmi_in_tcon1>;
+			};
+		};
+	};
+};
+
+hdmi: hdmi@1ee0000 {
+	compatible = "allwinner,sun8i-a83t-dw-hdmi";
+	reg = <0x01ee0000 0x10000>;
+	reg-io-width = <1>;
+	interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+	clock-names = "iahb", "isfr";
+	resets = <&ccu RST_BUS_HDMI1>;
+	reset-names = "ctrl";
+	phys = <&hdmi_phy>;
+	phy-names = "hdmi-phy";
+	status = "disabled";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hdmi_in: port@0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			hdmi_in_tcon1: endpoint@0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_out_hdmi>;
+			};
+		};
+
+		hdmi_out: port@1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			hdmi_out_con: endpoint {
+				remote-endpoint = <&hdmi_con_in>;
+			};
+		};
+	};
+};
+
+hdmi_phy: hdmi-phy@1ef0000 {
+	compatible = "allwinner,sun8i-a83t-hdmi-phy";
+	reg = <0x01ef0000 0x10000>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+		 <&ccu CLK_HDMI>;
+	clock-names = "bus", "mod", "tmds";
+	resets = <&ccu RST_BUS_HDMI0>;
+	reset-names = "phy";
+	#phy-cells = <0>;
+};
-- 
2.15.1

[PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Skrabec]

This commit adds all necessary compatibles and descriptions needed to
implement A83T HDMI pipeline.

Mixer is already properly described, so only compatible is added.

However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
contrary to all TCONs currently described. Because of that, TCON
documentation is extended.

A83T features Synopsys DW HDMI controller with a custom PHY which looks
like Synopsys Gen2 PHY with few additions. Since there is no
documentation, needed properties were found out through experimentation
and reading BSP code.

At the end, example is added for newer SoCs, which feature DE2 and DW
HDMI.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 .../bindings/display/sunxi/sun4i-drm.txt           | 197 ++++++++++++++++++++-
 1 file changed, 190 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index cd626ee1147a..4fb380f3e53d 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -64,6 +64,52 @@ Required properties:
     first port should be the input endpoint. The second should be the
     output, usually to an HDMI connector.
 
+DWC HDMI TX Encoder
+-------------------
+
+The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
+with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
+
+These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
+Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
+following device-specific properties.
+
+Required properties:
+
+  - compatible: value must be one of:
+    * "allwinner,sun8i-a83t-dw-hdmi"
+  - reg: base address and size of memory-mapped region
+  - reg-io-width: See dw_hdmi.txt. Shall be 1.
+  - interrupts: HDMI interrupt number
+  - clocks: phandles to the clocks feeding the HDMI encoder
+    * iahb: the HDMI bus clock
+    * isfr: the HDMI register clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller
+  - reset-names: must be "ctrl"
+  - phys: phandle to the DWC HDMI PHY
+  - phy-names: must be "phy"
+
+  - ports: A ports node with endpoint definitions as defined in
+    Documentation/devicetree/bindings/media/video-interfaces.txt. The
+    first port should be the input endpoint. The second should be the
+    output, usually to an HDMI connector.
+
+DWC HDMI PHY
+------------
+
+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun8i-a83t-hdmi-phy
+  - reg: base address and size of memory-mapped region
+  - clocks: phandles to the clocks feeding the HDMI PHY
+    * bus: the HDMI PHY interface clock
+    * mod: the HDMI PHY module clock
+    * tmds: TMDS clock
+  - clock-names: the clock names mentioned above
+  - resets: phandle to the reset controller driving the PHY
+  - reset-names: must be "phy"
+
 TV Encoder
 ----------
 
@@ -94,24 +140,23 @@ Required properties:
    * allwinner,sun7i-a20-tcon
    * allwinner,sun8i-a33-tcon
    * allwinner,sun8i-a83t-tcon-lcd
+   * allwinner,sun8i-a83t-tcon-tv
    * allwinner,sun8i-v3s-tcon
  - reg: base address and size of memory-mapped region
  - interrupts: interrupt associated to this IP
- - clocks: phandles to the clocks feeding the TCON. Three are needed:
+ - clocks: phandles to the clocks feeding the TCON. One is needed:
    - 'ahb': the interface clocks
-   - 'tcon-ch0': The clock driving the TCON channel 0
  - resets: phandles to the reset controllers driving the encoder
    - "lcd": the reset line for the TCON channel 0
 
  - clock-names: the clock names mentioned above
  - reset-names: the reset names mentioned above
- - clock-output-names: Name of the pixel clock created
 
 - ports: A ports node with endpoint definitions as defined in
   Documentation/devicetree/bindings/media/video-interfaces.txt. The
   first port should be the input endpoint, the second one the output
 
-  The output may have multiple endpoints. The TCON has two channels,
+  The output may have multiple endpoints. TCON can have two channels,
   usually with the first channel being used for the panels interfaces
   (RGB, LVDS, etc.), and the second being used for the outputs that
   require another controller (TV Encoder, HDMI, etc.). The endpoints
@@ -119,11 +164,16 @@ Required properties:
   channel the endpoint is associated to. If that property is not
   present, the endpoint number will be used as the channel number.
 
+When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
+more clocks are needed:
+   - 'tcon-ch0': The clock driving the TCON channel 0
+   - clock-output-names: Name of the pixel clock created
+
 On SoCs other than the A33 and V3s, there is one more clock required:
    - 'tcon-ch1': The clock driving the TCON channel 1
 
-On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
-need one more reset line:
+When TCON support LVDS (all TCONs except TV TCON on A83T and those found
+in A13, H3, H5 and V3s SoCs), you need one more reset line:
    - 'lvds': The reset line driving the LVDS logic
 
 And on the A23, A31, A31s and A33, you need one more clock line:
@@ -226,6 +276,7 @@ supported.
 Required properties:
   - compatible: value must be one of:
     * allwinner,sun8i-a83t-de2-mixer-0
+    * allwinner,sun8i-a83t-de2-mixer-1
     * allwinner,sun8i-v3s-de2-mixer
   - reg: base address and size of the memory-mapped region.
   - clocks: phandles to the clocks feeding the mixer
@@ -261,7 +312,7 @@ Required properties:
   - allwinner,pipelines: list of phandle to the display engine
     frontends (DE 1.0) or mixers (DE 2.0) available.
 
-Example:
+Example 1:
 
 panel: panel {
 	compatible = "olimex,lcd-olinuxino-43-ts";
@@ -460,3 +511,135 @@ display-engine {
 	compatible = "allwinner,sun5i-a13-display-engine";
 	allwinner,pipelines = <&fe0>;
 };
+
+Example 2:
+
+connector {
+	compatible = "hdmi-connector";
+	type = "a";
+
+	port {
+		hdmi_con_in: endpoint {
+			remote-endpoint = <&hdmi_out_con>;
+		};
+	};
+};
+
+de: display-engine {
+	compatible = "allwinner,sun8i-a83t-display-engine";
+	allwinner,pipelines = <&mixer1>;
+};
+
+mixer1: mixer at 1200000 {
+	compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+	reg = <0x01200000 0x100000>;
+	clocks = <&display_clocks CLK_BUS_MIXER1>,
+		 <&display_clocks CLK_MIXER1>;
+	clock-names = "bus",
+		      "mod";
+	resets = <&display_clocks RST_WB>;
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		mixer1_out: port at 1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			mixer1_out_tcon1: endpoint at 0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_in_mixer1>;
+			};
+		};
+	};
+};
+
+tcon1: lcd-controller at 1c0d000 {
+	compatible = "allwinner,sun8i-a83t-tcon-tv";
+	reg = <0x01c0d000 0x1000>;
+	interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+	clock-names = "ahb", "tcon-ch1";
+	resets = <&ccu RST_BUS_TCON1>;
+	reset-names = "lcd";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		tcon1_in: port at 0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			tcon1_in_mixer1: endpoint at 0 {
+				reg = <0>;
+				remote-endpoint = <&mixer1_out_tcon1>;
+			};
+		};
+
+		tcon1_out: port at 1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			tcon1_out_hdmi: endpoint at 1 {
+				reg = <1>;
+				remote-endpoint = <&hdmi_in_tcon1>;
+			};
+		};
+	};
+};
+
+hdmi: hdmi at 1ee0000 {
+	compatible = "allwinner,sun8i-a83t-dw-hdmi";
+	reg = <0x01ee0000 0x10000>;
+	reg-io-width = <1>;
+	interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+	clock-names = "iahb", "isfr";
+	resets = <&ccu RST_BUS_HDMI1>;
+	reset-names = "ctrl";
+	phys = <&hdmi_phy>;
+	phy-names = "hdmi-phy";
+	status = "disabled";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hdmi_in: port at 0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0>;
+
+			hdmi_in_tcon1: endpoint at 0 {
+				reg = <0>;
+				remote-endpoint = <&tcon1_out_hdmi>;
+			};
+		};
+
+		hdmi_out: port at 1 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <1>;
+
+			hdmi_out_con: endpoint {
+				remote-endpoint = <&hdmi_con_in>;
+			};
+		};
+	};
+};
+
+hdmi_phy: hdmi-phy at 1ef0000 {
+	compatible = "allwinner,sun8i-a83t-hdmi-phy";
+	reg = <0x01ef0000 0x10000>;
+	clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+		 <&ccu CLK_HDMI>;
+	clock-names = "bus", "mod", "tmds";
+	resets = <&ccu RST_BUS_HDMI0>;
+	reset-names = "phy";
+	#phy-cells = <0>;
+};
-- 
2.15.1

[PATCH v3 07/12] drm/sun4i: Add has_channel_0 TCON quirk

[Jernej Skrabec]

Some TCONs on newer SoCs doesn't support channel 0, since they are meant
to be used only with TV or HDMI encoder.

Prepare support for them with adding has_channel_0 quirk.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 41 +++++++++++++++++++++++++++-----------
 drivers/gpu/drm/sun4i/sun4i_tcon.h |  1 +
 2 files changed, 30 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index b78fed809992..0815c528d08e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -84,6 +84,7 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
 
 	switch (channel) {
 	case 0:
+		WARN_ON(!tcon->quirks->has_channel_0);
 		regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
 				   SUN4I_TCON0_CTL_TCON_ENABLE,
 				   enabled ? SUN4I_TCON0_CTL_TCON_ENABLE : 0);
@@ -276,6 +277,8 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 reg, val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 7;
 	tcon->dclk_max_div = 7;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -344,6 +347,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 6;
 	tcon->dclk_max_div = 127;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -570,10 +575,12 @@ static int sun4i_tcon_init_clocks(struct device *dev,
 	}
 	clk_prepare_enable(tcon->clk);
 
-	tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
-	if (IS_ERR(tcon->sclk0)) {
-		dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
-		return PTR_ERR(tcon->sclk0);
+	if (tcon->quirks->has_channel_0) {
+		tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
+		if (IS_ERR(tcon->sclk0)) {
+			dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
+			return PTR_ERR(tcon->sclk0);
+		}
 	}
 
 	if (tcon->quirks->has_channel_1) {
@@ -930,10 +937,12 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_clocks;
 	}
 
-	ret = sun4i_dclk_create(dev, tcon);
-	if (ret) {
-		dev_err(dev, "Couldn't create our TCON dot clock\n");
-		goto err_free_clocks;
+	if (tcon->quirks->has_channel_0) {
+		ret = sun4i_dclk_create(dev, tcon);
+		if (ret) {
+			dev_err(dev, "Couldn't create our TCON dot clock\n");
+			goto err_free_clocks;
+		}
 	}
 
 	ret = sun4i_tcon_init_irq(dev, tcon);
@@ -991,7 +1000,8 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	return 0;
 
 err_free_dotclock:
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 err_free_clocks:
 	sun4i_tcon_free_clocks(tcon);
 err_assert_reset:
@@ -1005,7 +1015,8 @@ static void sun4i_tcon_unbind(struct device *dev, struct device *master,
 	struct sun4i_tcon *tcon = dev_get_drvdata(dev);
 
 	list_del(&tcon->list);
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 	sun4i_tcon_free_clocks(tcon);
 }
 
@@ -1102,16 +1113,19 @@ static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon,
 }
 
 static const struct sun4i_tcon_quirks sun4i_a10_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun5i_a13_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun5i_a13_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.has_lvds_alt		= true,
 	.needs_de_be_mux	= true,
@@ -1119,26 +1133,29 @@ static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.needs_de_be_mux	= true,
 };
 
 static const struct sun4i_tcon_quirks sun7i_a20_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	/* Same display pipeline structure as A10 */
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
+	.has_channel_0		= true,
 	.has_lvds_alt		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 /* sun4i_drv uses this list to check if a device node is a TCON */
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index b761c7b823c5..78d55e7cd2b3 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -172,6 +172,7 @@
 struct sun4i_tcon;
 
 struct sun4i_tcon_quirks {
+	bool	has_channel_0;	/* a83t does not have channel 0 on second TCON */
 	bool	has_channel_1;	/* a33 does not have channel 1 */
 	bool	has_lvds_alt;	/* Does the LVDS clock have a parent other than the TCON clock? */
 	bool	needs_de_be_mux; /* sun6i needs mux to select backend */
-- 
2.15.1

[PATCH v3 07/12] drm/sun4i: Add has_channel_0 TCON quirk

[Jernej Skrabec]

Some TCONs on newer SoCs doesn't support channel 0, since they are meant
to be used only with TV or HDMI encoder.

Prepare support for them with adding has_channel_0 quirk.

Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 41 +++++++++++++++++++++++++++-----------
 drivers/gpu/drm/sun4i/sun4i_tcon.h |  1 +
 2 files changed, 30 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index b78fed809992..0815c528d08e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -84,6 +84,7 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
 
 	switch (channel) {
 	case 0:
+		WARN_ON(!tcon->quirks->has_channel_0);
 		regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
 				   SUN4I_TCON0_CTL_TCON_ENABLE,
 				   enabled ? SUN4I_TCON0_CTL_TCON_ENABLE : 0);
@@ -276,6 +277,8 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 reg, val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 7;
 	tcon->dclk_max_div = 7;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -344,6 +347,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 6;
 	tcon->dclk_max_div = 127;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -570,10 +575,12 @@ static int sun4i_tcon_init_clocks(struct device *dev,
 	}
 	clk_prepare_enable(tcon->clk);
 
-	tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
-	if (IS_ERR(tcon->sclk0)) {
-		dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
-		return PTR_ERR(tcon->sclk0);
+	if (tcon->quirks->has_channel_0) {
+		tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
+		if (IS_ERR(tcon->sclk0)) {
+			dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
+			return PTR_ERR(tcon->sclk0);
+		}
 	}
 
 	if (tcon->quirks->has_channel_1) {
@@ -930,10 +937,12 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_clocks;
 	}
 
-	ret = sun4i_dclk_create(dev, tcon);
-	if (ret) {
-		dev_err(dev, "Couldn't create our TCON dot clock\n");
-		goto err_free_clocks;
+	if (tcon->quirks->has_channel_0) {
+		ret = sun4i_dclk_create(dev, tcon);
+		if (ret) {
+			dev_err(dev, "Couldn't create our TCON dot clock\n");
+			goto err_free_clocks;
+		}
 	}
 
 	ret = sun4i_tcon_init_irq(dev, tcon);
@@ -991,7 +1000,8 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	return 0;
 
 err_free_dotclock:
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 err_free_clocks:
 	sun4i_tcon_free_clocks(tcon);
 err_assert_reset:
@@ -1005,7 +1015,8 @@ static void sun4i_tcon_unbind(struct device *dev, struct device *master,
 	struct sun4i_tcon *tcon = dev_get_drvdata(dev);
 
 	list_del(&tcon->list);
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 	sun4i_tcon_free_clocks(tcon);
 }
 
@@ -1102,16 +1113,19 @@ static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon,
 }
 
 static const struct sun4i_tcon_quirks sun4i_a10_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun5i_a13_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun5i_a13_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.has_lvds_alt		= true,
 	.needs_de_be_mux	= true,
@@ -1119,26 +1133,29 @@ static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.needs_de_be_mux	= true,
 };
 
 static const struct sun4i_tcon_quirks sun7i_a20_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	/* Same display pipeline structure as A10 */
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
+	.has_channel_0		= true,
 	.has_lvds_alt		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 /* sun4i_drv uses this list to check if a device node is a TCON */
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index b761c7b823c5..78d55e7cd2b3 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -172,6 +172,7 @@
 struct sun4i_tcon;
 
 struct sun4i_tcon_quirks {
+	bool	has_channel_0;	/* a83t does not have channel 0 on second TCON */
 	bool	has_channel_1;	/* a33 does not have channel 1 */
 	bool	has_lvds_alt;	/* Does the LVDS clock have a parent other than the TCON clock? */
 	bool	needs_de_be_mux; /* sun6i needs mux to select backend */
-- 
2.15.1

[PATCH v3 07/12] drm/sun4i: Add has_channel_0 TCON quirk

[Jernej Skrabec]

Some TCONs on newer SoCs doesn't support channel 0, since they are meant
to be used only with TV or HDMI encoder.

Prepare support for them with adding has_channel_0 quirk.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 41 +++++++++++++++++++++++++++-----------
 drivers/gpu/drm/sun4i/sun4i_tcon.h |  1 +
 2 files changed, 30 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index b78fed809992..0815c528d08e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -84,6 +84,7 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel,
 
 	switch (channel) {
 	case 0:
+		WARN_ON(!tcon->quirks->has_channel_0);
 		regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG,
 				   SUN4I_TCON0_CTL_TCON_ENABLE,
 				   enabled ? SUN4I_TCON0_CTL_TCON_ENABLE : 0);
@@ -276,6 +277,8 @@ static void sun4i_tcon0_mode_set_lvds(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 reg, val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 7;
 	tcon->dclk_max_div = 7;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -344,6 +347,8 @@ static void sun4i_tcon0_mode_set_rgb(struct sun4i_tcon *tcon,
 	u8 clk_delay;
 	u32 val = 0;
 
+	WARN_ON(!tcon->quirks->has_channel_0);
+
 	tcon->dclk_min_div = 6;
 	tcon->dclk_max_div = 127;
 	sun4i_tcon0_mode_set_common(tcon, mode);
@@ -570,10 +575,12 @@ static int sun4i_tcon_init_clocks(struct device *dev,
 	}
 	clk_prepare_enable(tcon->clk);
 
-	tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
-	if (IS_ERR(tcon->sclk0)) {
-		dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
-		return PTR_ERR(tcon->sclk0);
+	if (tcon->quirks->has_channel_0) {
+		tcon->sclk0 = devm_clk_get(dev, "tcon-ch0");
+		if (IS_ERR(tcon->sclk0)) {
+			dev_err(dev, "Couldn't get the TCON channel 0 clock\n");
+			return PTR_ERR(tcon->sclk0);
+		}
 	}
 
 	if (tcon->quirks->has_channel_1) {
@@ -930,10 +937,12 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_clocks;
 	}
 
-	ret = sun4i_dclk_create(dev, tcon);
-	if (ret) {
-		dev_err(dev, "Couldn't create our TCON dot clock\n");
-		goto err_free_clocks;
+	if (tcon->quirks->has_channel_0) {
+		ret = sun4i_dclk_create(dev, tcon);
+		if (ret) {
+			dev_err(dev, "Couldn't create our TCON dot clock\n");
+			goto err_free_clocks;
+		}
 	}
 
 	ret = sun4i_tcon_init_irq(dev, tcon);
@@ -991,7 +1000,8 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	return 0;
 
 err_free_dotclock:
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 err_free_clocks:
 	sun4i_tcon_free_clocks(tcon);
 err_assert_reset:
@@ -1005,7 +1015,8 @@ static void sun4i_tcon_unbind(struct device *dev, struct device *master,
 	struct sun4i_tcon *tcon = dev_get_drvdata(dev);
 
 	list_del(&tcon->list);
-	sun4i_dclk_free(tcon);
+	if (tcon->quirks->has_channel_0)
+		sun4i_dclk_free(tcon);
 	sun4i_tcon_free_clocks(tcon);
 }
 
@@ -1102,16 +1113,19 @@ static int sun6i_tcon_set_mux(struct sun4i_tcon *tcon,
 }
 
 static const struct sun4i_tcon_quirks sun4i_a10_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun5i_a13_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.set_mux		= sun5i_a13_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.has_lvds_alt		= true,
 	.needs_de_be_mux	= true,
@@ -1119,26 +1133,29 @@ static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
 };
 
 static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	.needs_de_be_mux	= true,
 };
 
 static const struct sun4i_tcon_quirks sun7i_a20_quirks = {
+	.has_channel_0		= true,
 	.has_channel_1		= true,
 	/* Same display pipeline structure as A10 */
 	.set_mux		= sun4i_a10_tcon_set_mux,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
+	.has_channel_0		= true,
 	.has_lvds_alt		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
-	/* nothing is supported */
+	.has_channel_0		= true,
 };
 
 /* sun4i_drv uses this list to check if a device node is a TCON */
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index b761c7b823c5..78d55e7cd2b3 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -172,6 +172,7 @@
 struct sun4i_tcon;
 
 struct sun4i_tcon_quirks {
+	bool	has_channel_0;	/* a83t does not have channel 0 on second TCON */
 	bool	has_channel_1;	/* a33 does not have channel 1 */
 	bool	has_lvds_alt;	/* Does the LVDS clock have a parent other than the TCON clock? */
 	bool	needs_de_be_mux; /* sun6i needs mux to select backend */
-- 
2.15.1

[PATCH v3 08/12] drm/sun4i: Add support for A83T second TCON

[Jernej Skrabec]

This TCON is connected to HDMI encoder.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 0815c528d08e..adfa39f372cf 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -1154,6 +1154,10 @@ static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
 	.has_channel_0		= true,
 };
 
+static const struct sun4i_tcon_quirks sun8i_a83t_tv_quirks = {
+	.has_channel_1		= true,
+};
+
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
 	.has_channel_0		= true,
 };
@@ -1167,6 +1171,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
 	{ .compatible = "allwinner,sun7i-a20-tcon", .data = &sun7i_a20_quirks },
 	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ .compatible = "allwinner,sun8i-a83t-tcon-lcd", .data = &sun8i_a83t_lcd_quirks },
+	{ .compatible = "allwinner,sun8i-a83t-tcon-tv", .data = &sun8i_a83t_tv_quirks },
 	{ .compatible = "allwinner,sun8i-v3s-tcon", .data = &sun8i_v3s_quirks },
 	{ }
 };
-- 
2.15.1

[PATCH v3 08/12] drm/sun4i: Add support for A83T second TCON

[Jernej Skrabec]

This TCON is connected to HDMI encoder.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 0815c528d08e..adfa39f372cf 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -1154,6 +1154,10 @@ static const struct sun4i_tcon_quirks sun8i_a83t_lcd_quirks = {
 	.has_channel_0		= true,
 };
 
+static const struct sun4i_tcon_quirks sun8i_a83t_tv_quirks = {
+	.has_channel_1		= true,
+};
+
 static const struct sun4i_tcon_quirks sun8i_v3s_quirks = {
 	.has_channel_0		= true,
 };
@@ -1167,6 +1171,7 @@ const struct of_device_id sun4i_tcon_of_table[] = {
 	{ .compatible = "allwinner,sun7i-a20-tcon", .data = &sun7i_a20_quirks },
 	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ .compatible = "allwinner,sun8i-a83t-tcon-lcd", .data = &sun8i_a83t_lcd_quirks },
+	{ .compatible = "allwinner,sun8i-a83t-tcon-tv", .data = &sun8i_a83t_tv_quirks },
 	{ .compatible = "allwinner,sun8i-v3s-tcon", .data = &sun8i_v3s_quirks },
 	{ }
 };
-- 
2.15.1

[PATCH v3 09/12] drm/sun4i: Add support for A83T second DE2 mixer

[Jernej Skrabec]

It supports 1 VI and 1 UI plane and HW scaling on both planes.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 2cbb2de6d39c..9b0256d31a61 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -485,6 +485,13 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 	.vi_num		= 1,
 };
 
+static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
+	.ccsc		= 1,
+	.scaler_mask	= 0x3,
+	.ui_num		= 1,
+	.vi_num		= 1,
+};
+
 static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
 	.vi_num = 2,
 	.ui_num = 1,
@@ -498,6 +505,10 @@ static const struct of_device_id sun8i_mixer_of_table[] = {
 		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
 		.data = &sun8i_a83t_mixer0_cfg,
 	},
+	{
+		.compatible = "allwinner,sun8i-a83t-de2-mixer-1",
+		.data = &sun8i_a83t_mixer1_cfg,
+	},
 	{
 		.compatible = "allwinner,sun8i-v3s-de2-mixer",
 		.data = &sun8i_v3s_mixer_cfg,
-- 
2.15.1

[PATCH v3 09/12] drm/sun4i: Add support for A83T second DE2 mixer

[Jernej Skrabec]

It supports 1 VI and 1 UI plane and HW scaling on both planes.

Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 2cbb2de6d39c..9b0256d31a61 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -485,6 +485,13 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 	.vi_num		= 1,
 };
 
+static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
+	.ccsc		= 1,
+	.scaler_mask	= 0x3,
+	.ui_num		= 1,
+	.vi_num		= 1,
+};
+
 static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
 	.vi_num = 2,
 	.ui_num = 1,
@@ -498,6 +505,10 @@ static const struct of_device_id sun8i_mixer_of_table[] = {
 		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
 		.data = &sun8i_a83t_mixer0_cfg,
 	},
+	{
+		.compatible = "allwinner,sun8i-a83t-de2-mixer-1",
+		.data = &sun8i_a83t_mixer1_cfg,
+	},
 	{
 		.compatible = "allwinner,sun8i-v3s-de2-mixer",
 		.data = &sun8i_v3s_mixer_cfg,
-- 
2.15.1

[PATCH v3 09/12] drm/sun4i: Add support for A83T second DE2 mixer

[Jernej Skrabec]

It supports 1 VI and 1 UI plane and HW scaling on both planes.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
index 2cbb2de6d39c..9b0256d31a61 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
@@ -485,6 +485,13 @@ static const struct sun8i_mixer_cfg sun8i_a83t_mixer0_cfg = {
 	.vi_num		= 1,
 };
 
+static const struct sun8i_mixer_cfg sun8i_a83t_mixer1_cfg = {
+	.ccsc		= 1,
+	.scaler_mask	= 0x3,
+	.ui_num		= 1,
+	.vi_num		= 1,
+};
+
 static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
 	.vi_num = 2,
 	.ui_num = 1,
@@ -498,6 +505,10 @@ static const struct of_device_id sun8i_mixer_of_table[] = {
 		.compatible = "allwinner,sun8i-a83t-de2-mixer-0",
 		.data = &sun8i_a83t_mixer0_cfg,
 	},
+	{
+		.compatible = "allwinner,sun8i-a83t-de2-mixer-1",
+		.data = &sun8i_a83t_mixer1_cfg,
+	},
 	{
 		.compatible = "allwinner,sun8i-v3s-de2-mixer",
 		.data = &sun8i_v3s_mixer_cfg,
-- 
2.15.1

[PATCH v3 10/12] drm/sun4i: Implement A83T HDMI driver

[Jernej Skrabec]

A83T has DW HDMI IP block with a custom PHY similar to Synopsys gen2
HDMI PHY.

Only video output was tested, while HW also supports audio and CEC.
Support for them will be added later.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/Kconfig          |   9 +
 drivers/gpu/drm/sun4i/Makefile         |   4 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c  | 181 ++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h  |  46 +++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 302 +++++++++++++++++++++++++++++++++
 5 files changed, 542 insertions(+)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 882d85db9053..7327da3bc94f 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -40,6 +40,15 @@ config DRM_SUN4I_BACKEND
 	  do some alpha blending and feed graphics to TCON. If M is
 	  selected the module will be called sun4i-backend.
 
+config DRM_SUN8I_DW_HDMI
+	tristate "Support for Allwinner version of DesignWare HDMI"
+	depends on DRM_SUN4I
+	select DRM_DW_HDMI
+	help
+	  Choose this option if you have an Allwinner SoC with the
+	  DesignWare HDMI controller with custom HDMI PHY. If M is
+	  selected the module will be called sun8i_dw_hdmi.
+
 config DRM_SUN8I_MIXER
 	tristate "Support for Allwinner Display Engine 2.0 Mixer"
 	default MACH_SUN8I
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 2b37a6abbb1d..a7c47d9aa64d 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -9,6 +9,9 @@ sun4i-drm-hdmi-y		+= sun4i_hdmi_enc.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_i2c.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_tmds_clk.o
 
+sun8i-drm-hdmi-y		+= sun8i_dw_hdmi.o
+sun8i-drm-hdmi-y		+= sun8i_hdmi_phy.o
+
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
 				   sun8i_vi_scaler.o sun8i_csc.o
@@ -26,4 +29,5 @@ obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
 
 obj-$(CONFIG_DRM_SUN4I_BACKEND)	+= sun4i-backend.o
 obj-$(CONFIG_DRM_SUN4I_HDMI)	+= sun4i-drm-hdmi.o
+obj-$(CONFIG_DRM_SUN8I_DW_HDMI)	+= sun8i-drm-hdmi.o
 obj-$(CONFIG_DRM_SUN8I_MIXER)	+= sun8i-mixer.o
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
new file mode 100644
index 000000000000..12b73ced9517
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_of.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "sun8i_dw_hdmi.h"
+
+static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
+					   struct drm_display_mode *mode,
+					   struct drm_display_mode *adj_mode)
+{
+	struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
+
+	sun8i_hdmi_phy_update_clock(hdmi->phy, mode->crtc_clock * 1000);
+}
+
+static const struct drm_encoder_helper_funcs
+sun8i_dw_hdmi_encoder_helper_funcs = {
+	.mode_set = sun8i_dw_hdmi_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs sun8i_dw_hdmi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static enum drm_mode_status
+sun8i_dw_hdmi_mode_valid(struct drm_connector *connector,
+			 const struct drm_display_mode *mode)
+{
+	if (mode->clock > 297000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
+			      void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_hdmi_plat_data *plat_data;
+	struct drm_device *drm = data;
+	struct device_node *phy_node;
+	struct drm_encoder *encoder;
+	struct sun8i_dw_hdmi *hdmi;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
+	if (!hdmi)
+		return -ENOMEM;
+
+	plat_data = &hdmi->plat_data;
+	hdmi->dev = &pdev->dev;
+	encoder = &hdmi->encoder;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+	/*
+	 * If we failed to find the CRTC(s) which this encoder is
+	 * supposed to be connected to, it's because the CRTC has
+	 * not been registered yet.  Defer probing, and hope that
+	 * the required CRTC is added later.
+	 */
+	if (encoder->possible_crtcs == 0)
+		return -EPROBE_DEFER;
+
+	hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
+	if (IS_ERR(hdmi->rst_ctrl)) {
+		dev_err(dev, "Could not get ctrl reset control\n");
+		return PTR_ERR(hdmi->rst_ctrl);
+	}
+
+	ret = reset_control_deassert(hdmi->rst_ctrl);
+	if (ret) {
+		dev_err(dev, "Could not deassert ctrl reset control\n");
+		return ret;
+	}
+
+	phy_node = of_parse_phandle(dev->of_node, "phys", 0);
+	if (!phy_node) {
+		dev_err(dev, "Can't found PHY phandle\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	ret = sun8i_hdmi_phy_probe(hdmi, phy_node);
+	of_node_put(phy_node);
+	if (ret) {
+		dev_err(dev, "Couldn't get the HDMI PHY\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
+	drm_encoder_init(drm, encoder, &sun8i_dw_hdmi_encoder_funcs,
+			 DRM_MODE_ENCODER_TMDS, NULL);
+
+	sun8i_hdmi_phy_init(hdmi->phy);
+
+	plat_data->mode_valid = &sun8i_dw_hdmi_mode_valid;
+	plat_data->phy_ops = sun8i_hdmi_phy_get_ops();
+	plat_data->phy_name = "sun8i_dw_hdmi_phy";
+	plat_data->phy_data = hdmi->phy;
+
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
+
+	/*
+	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
+	 * which would have called the encoder cleanup.  Do it manually.
+	 */
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
+		goto cleanup_encoder;
+	}
+
+	return 0;
+
+cleanup_encoder:
+	drm_encoder_cleanup(encoder);
+	sun8i_hdmi_phy_remove(hdmi);
+err_assert_ctrl_reset:
+	reset_control_assert(hdmi->rst_ctrl);
+
+	return ret;
+}
+
+static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
+				 void *data)
+{
+	struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
+	sun8i_hdmi_phy_remove(hdmi);
+	reset_control_assert(hdmi->rst_ctrl);
+}
+
+static const struct component_ops sun8i_dw_hdmi_ops = {
+	.bind	= sun8i_dw_hdmi_bind,
+	.unbind	= sun8i_dw_hdmi_unbind,
+};
+
+static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
+}
+
+static int sun8i_dw_hdmi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
+
+	return 0;
+}
+
+static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
+	{ .compatible = "allwinner,sun8i-a83t-dw-hdmi" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
+
+struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
+	.probe  = sun8i_dw_hdmi_probe,
+	.remove = sun8i_dw_hdmi_remove,
+	.driver = {
+		.name = "sun8i-dw-hdmi",
+		.of_match_table = sun8i_dw_hdmi_dt_ids,
+	},
+};
+module_platform_driver(sun8i_dw_hdmi_pltfm_driver);
+
+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
+MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
new file mode 100644
index 000000000000..007abab1ba29
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#ifndef _SUN8I_DW_HDMI_H_
+#define _SUN8I_DW_HDMI_H_
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_encoder.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+struct sun8i_hdmi_phy {
+	struct clk		*clk_bus;
+	struct clk		*clk_mod;
+	struct clk		*clk_tmds;
+	struct regmap		*regs;
+	struct reset_control	*rst_phy;
+};
+
+struct sun8i_dw_hdmi {
+	struct device			*dev;
+	struct dw_hdmi			*hdmi;
+	struct drm_encoder		encoder;
+	struct sun8i_hdmi_phy		*phy;
+	struct dw_hdmi_plat_data	plat_data;
+	struct reset_control		*rst_ctrl;
+};
+
+static inline struct sun8i_dw_hdmi *
+encoder_to_sun8i_dw_hdmi(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct sun8i_dw_hdmi, encoder);
+}
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node);
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi);
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy);
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void);
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate);
+
+#endif /* _SUN8I_DW_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
new file mode 100644
index 000000000000..2555e488c5c5
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/of_address.h>
+
+#include "sun8i_dw_hdmi.h"
+
+#define SUN8I_HDMI_PHY_DBG_CTRL_REG	0x0000
+#define SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK		BIT(0)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK	GENMASK(15, 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL(val)	(val << 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK	GENMASK(23, 16)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR(addr)	(addr << 16)
+
+#define SUN8I_HDMI_PHY_REXT_CTRL_REG	0x0004
+#define SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN	BIT(31)
+
+#define SUN8I_HDMI_PHY_READ_EN_REG	0x0010
+#define SUN8I_HDMI_PHY_READ_EN_MAGIC		0x54524545
+
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_REG	0x0014
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC		0x42494E47
+
+/*
+ * Address can be actually any value. Here is set to same value as
+ * it is set in BSP driver.
+ */
+#define I2C_ADDR	0x69
+
+static int sun8i_hdmi_phy_config(struct dw_hdmi *hdmi, void *data,
+				 struct drm_display_mode *mode)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+	u32 val = 0;
+	int ret;
+
+	ret = clk_enable(phy->clk_tmds);
+	if (ret)
+		return ret;
+
+	if ((mode->flags & DRM_MODE_FLAG_NHSYNC) &&
+	    (mode->flags & DRM_MODE_FLAG_NHSYNC)) {
+		val = 0x03;
+	}
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL(val));
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN);
+
+	/* power down */
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	dw_hdmi_phy_reset(hdmi);
+
+	dw_hdmi_phy_gen2_pddq(hdmi, 0);
+
+	dw_hdmi_phy_i2c_set_addr(hdmi, I2C_ADDR);
+
+	/*
+	 * Values are taken from BSP HDMI driver. Although AW didn't
+	 * release any documentation, explanation of this values can
+	 * be found in i.MX 6Dual/6Quad Reference Manual.
+	 */
+	if (mode->crtc_clock <= 27000) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x01e0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x08da, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0318, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 74250) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0540, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0005, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x02b5, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 148500) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x04a0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000a, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0021, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8029, 0x09);
+	} else {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000f, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x802b, 0x09);
+	}
+
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x1e);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x17);
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
+
+	return 0;
+};
+
+static void sun8i_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN, 0);
+
+	clk_disable(phy->clk_tmds);
+}
+
+static const struct dw_hdmi_phy_ops sun8i_hdmi_phy_ops = {
+	.init = &sun8i_hdmi_phy_config,
+	.disable = &sun8i_hdmi_phy_disable,
+	.read_hpd = &dw_hdmi_phy_read_hpd,
+	.update_hpd = &dw_hdmi_phy_update_hpd,
+	.setup_hpd = &dw_hdmi_phy_setup_hpd,
+};
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy)
+{
+	/* enable read access to HDMI controller */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_READ_EN_REG,
+		     SUN8I_HDMI_PHY_READ_EN_MAGIC);
+
+	/* unscramble register offsets */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+		     SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK);
+
+	/*
+	 * Set PHY I2C address. It must match to the address set by
+	 * dw_hdmi_phy_set_slave_addr().
+	 */
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR(I2C_ADDR));
+}
+
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void)
+{
+	return &sun8i_hdmi_phy_ops;
+}
+
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate)
+{
+	clk_set_rate(phy->clk_tmds, rate);
+}
+
+static struct regmap_config sun8i_hdmi_phy_regmap_config = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+	.name		= "phy"
+};
+
+static const struct of_device_id sun8i_hdmi_phy_of_table[] = {
+	{ .compatible = "allwinner,sun8i-a83t-hdmi-phy" },
+	{ /* sentinel */ }
+};
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
+{
+	struct device *dev = hdmi->dev;
+	struct sun8i_hdmi_phy *phy;
+	struct resource res;
+	void __iomem *regs;
+	int ret;
+
+	if (!of_match_node(sun8i_hdmi_phy_of_table, node)) {
+		dev_err(dev, "Incompatible HDMI PHY\n");
+		return -EINVAL;
+	}
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	ret = of_address_to_resource(node, 0, &res);
+	if (ret) {
+		dev_err(dev, "phy: Couldn't get our resources\n");
+		return ret;
+	}
+
+	regs = devm_ioremap_resource(dev, &res);
+	if (IS_ERR(regs)) {
+		dev_err(dev, "Couldn't map the HDMI PHY registers\n");
+		return PTR_ERR(regs);
+	}
+
+	phy->regs = devm_regmap_init_mmio(dev, regs,
+					  &sun8i_hdmi_phy_regmap_config);
+	if (IS_ERR(phy->regs)) {
+		dev_err(dev, "Couldn't create the HDMI PHY regmap\n");
+		return PTR_ERR(phy->regs);
+	}
+
+	phy->clk_bus = of_clk_get_by_name(node, "bus");
+	if (IS_ERR(phy->clk_bus)) {
+		dev_err(dev, "Could not get bus clock\n");
+		return PTR_ERR(phy->clk_bus);
+	}
+
+	phy->clk_mod = of_clk_get_by_name(node, "mod");
+	if (IS_ERR(phy->clk_mod)) {
+		dev_err(dev, "Could not get mod clock\n");
+		ret = PTR_ERR(phy->clk_mod);
+		goto err_put_clk_bus;
+	}
+
+	phy->clk_tmds = of_clk_get_by_name(node, "tmds");
+	if (IS_ERR(phy->clk_tmds)) {
+		dev_err(dev, "Could not get tmds clock\n");
+		ret = PTR_ERR(phy->clk_tmds);
+		goto err_put_clk_mod;
+	}
+
+	phy->rst_phy = of_reset_control_get_shared(node, "phy");
+	if (IS_ERR(phy->rst_phy)) {
+		dev_err(dev, "Could not get phy reset control\n");
+		ret = PTR_ERR(phy->rst_phy);
+		goto err_put_clk_tmds;
+	}
+
+	ret = reset_control_deassert(phy->rst_phy);
+	if (ret) {
+		dev_err(dev, "Cannot deassert phy reset control: %d\n", ret);
+		goto err_put_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_bus);
+	if (ret) {
+		dev_err(dev, "Cannot enable bus clock: %d\n", ret);
+		goto err_deassert_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_mod);
+	if (ret) {
+		dev_err(dev, "Cannot enable mod clock: %d\n", ret);
+		goto err_disable_clk_bus;
+	}
+
+	ret = clk_prepare(phy->clk_tmds);
+	if (ret) {
+		dev_err(dev, "Cannot prepare tmds clock: %d\n", ret);
+		goto err_disable_clk_mod;
+	}
+
+	hdmi->phy = phy;
+
+	return 0;
+
+err_disable_clk_mod:
+	clk_disable_unprepare(phy->clk_mod);
+err_disable_clk_bus:
+	clk_disable_unprepare(phy->clk_bus);
+err_deassert_rst_phy:
+	reset_control_assert(phy->rst_phy);
+err_put_rst_phy:
+	reset_control_put(phy->rst_phy);
+err_put_clk_tmds:
+	clk_put(phy->clk_tmds);
+err_put_clk_mod:
+	clk_put(phy->clk_mod);
+err_put_clk_bus:
+	clk_put(phy->clk_bus);
+
+	return ret;
+}
+
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi)
+{
+	struct sun8i_hdmi_phy *phy = hdmi->phy;
+
+	clk_unprepare(phy->clk_tmds);
+	clk_disable_unprepare(phy->clk_mod);
+	clk_disable_unprepare(phy->clk_bus);
+
+	reset_control_assert(phy->rst_phy);
+
+	reset_control_put(phy->rst_phy);
+
+	clk_put(phy->clk_tmds);
+	clk_put(phy->clk_mod);
+	clk_put(phy->clk_bus);
+}
-- 
2.15.1

[PATCH v3 10/12] drm/sun4i: Implement A83T HDMI driver

[Jernej Skrabec]

A83T has DW HDMI IP block with a custom PHY similar to Synopsys gen2
HDMI PHY.

Only video output was tested, while HW also supports audio and CEC.
Support for them will be added later.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 drivers/gpu/drm/sun4i/Kconfig          |   9 +
 drivers/gpu/drm/sun4i/Makefile         |   4 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c  | 181 ++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h  |  46 +++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 302 +++++++++++++++++++++++++++++++++
 5 files changed, 542 insertions(+)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 882d85db9053..7327da3bc94f 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -40,6 +40,15 @@ config DRM_SUN4I_BACKEND
 	  do some alpha blending and feed graphics to TCON. If M is
 	  selected the module will be called sun4i-backend.
 
+config DRM_SUN8I_DW_HDMI
+	tristate "Support for Allwinner version of DesignWare HDMI"
+	depends on DRM_SUN4I
+	select DRM_DW_HDMI
+	help
+	  Choose this option if you have an Allwinner SoC with the
+	  DesignWare HDMI controller with custom HDMI PHY. If M is
+	  selected the module will be called sun8i_dw_hdmi.
+
 config DRM_SUN8I_MIXER
 	tristate "Support for Allwinner Display Engine 2.0 Mixer"
 	default MACH_SUN8I
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 2b37a6abbb1d..a7c47d9aa64d 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -9,6 +9,9 @@ sun4i-drm-hdmi-y		+= sun4i_hdmi_enc.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_i2c.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_tmds_clk.o
 
+sun8i-drm-hdmi-y		+= sun8i_dw_hdmi.o
+sun8i-drm-hdmi-y		+= sun8i_hdmi_phy.o
+
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
 				   sun8i_vi_scaler.o sun8i_csc.o
@@ -26,4 +29,5 @@ obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
 
 obj-$(CONFIG_DRM_SUN4I_BACKEND)	+= sun4i-backend.o
 obj-$(CONFIG_DRM_SUN4I_HDMI)	+= sun4i-drm-hdmi.o
+obj-$(CONFIG_DRM_SUN8I_DW_HDMI)	+= sun8i-drm-hdmi.o
 obj-$(CONFIG_DRM_SUN8I_MIXER)	+= sun8i-mixer.o
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
new file mode 100644
index 000000000000..12b73ced9517
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_of.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "sun8i_dw_hdmi.h"
+
+static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
+					   struct drm_display_mode *mode,
+					   struct drm_display_mode *adj_mode)
+{
+	struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
+
+	sun8i_hdmi_phy_update_clock(hdmi->phy, mode->crtc_clock * 1000);
+}
+
+static const struct drm_encoder_helper_funcs
+sun8i_dw_hdmi_encoder_helper_funcs = {
+	.mode_set = sun8i_dw_hdmi_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs sun8i_dw_hdmi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static enum drm_mode_status
+sun8i_dw_hdmi_mode_valid(struct drm_connector *connector,
+			 const struct drm_display_mode *mode)
+{
+	if (mode->clock > 297000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
+			      void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_hdmi_plat_data *plat_data;
+	struct drm_device *drm = data;
+	struct device_node *phy_node;
+	struct drm_encoder *encoder;
+	struct sun8i_dw_hdmi *hdmi;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
+	if (!hdmi)
+		return -ENOMEM;
+
+	plat_data = &hdmi->plat_data;
+	hdmi->dev = &pdev->dev;
+	encoder = &hdmi->encoder;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+	/*
+	 * If we failed to find the CRTC(s) which this encoder is
+	 * supposed to be connected to, it's because the CRTC has
+	 * not been registered yet.  Defer probing, and hope that
+	 * the required CRTC is added later.
+	 */
+	if (encoder->possible_crtcs == 0)
+		return -EPROBE_DEFER;
+
+	hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
+	if (IS_ERR(hdmi->rst_ctrl)) {
+		dev_err(dev, "Could not get ctrl reset control\n");
+		return PTR_ERR(hdmi->rst_ctrl);
+	}
+
+	ret = reset_control_deassert(hdmi->rst_ctrl);
+	if (ret) {
+		dev_err(dev, "Could not deassert ctrl reset control\n");
+		return ret;
+	}
+
+	phy_node = of_parse_phandle(dev->of_node, "phys", 0);
+	if (!phy_node) {
+		dev_err(dev, "Can't found PHY phandle\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	ret = sun8i_hdmi_phy_probe(hdmi, phy_node);
+	of_node_put(phy_node);
+	if (ret) {
+		dev_err(dev, "Couldn't get the HDMI PHY\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
+	drm_encoder_init(drm, encoder, &sun8i_dw_hdmi_encoder_funcs,
+			 DRM_MODE_ENCODER_TMDS, NULL);
+
+	sun8i_hdmi_phy_init(hdmi->phy);
+
+	plat_data->mode_valid = &sun8i_dw_hdmi_mode_valid;
+	plat_data->phy_ops = sun8i_hdmi_phy_get_ops();
+	plat_data->phy_name = "sun8i_dw_hdmi_phy";
+	plat_data->phy_data = hdmi->phy;
+
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
+
+	/*
+	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
+	 * which would have called the encoder cleanup.  Do it manually.
+	 */
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
+		goto cleanup_encoder;
+	}
+
+	return 0;
+
+cleanup_encoder:
+	drm_encoder_cleanup(encoder);
+	sun8i_hdmi_phy_remove(hdmi);
+err_assert_ctrl_reset:
+	reset_control_assert(hdmi->rst_ctrl);
+
+	return ret;
+}
+
+static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
+				 void *data)
+{
+	struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
+	sun8i_hdmi_phy_remove(hdmi);
+	reset_control_assert(hdmi->rst_ctrl);
+}
+
+static const struct component_ops sun8i_dw_hdmi_ops = {
+	.bind	= sun8i_dw_hdmi_bind,
+	.unbind	= sun8i_dw_hdmi_unbind,
+};
+
+static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
+}
+
+static int sun8i_dw_hdmi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
+
+	return 0;
+}
+
+static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
+	{ .compatible = "allwinner,sun8i-a83t-dw-hdmi" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
+
+struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
+	.probe  = sun8i_dw_hdmi_probe,
+	.remove = sun8i_dw_hdmi_remove,
+	.driver = {
+		.name = "sun8i-dw-hdmi",
+		.of_match_table = sun8i_dw_hdmi_dt_ids,
+	},
+};
+module_platform_driver(sun8i_dw_hdmi_pltfm_driver);
+
+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>");
+MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
new file mode 100644
index 000000000000..007abab1ba29
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
+ */
+
+#ifndef _SUN8I_DW_HDMI_H_
+#define _SUN8I_DW_HDMI_H_
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_encoder.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+struct sun8i_hdmi_phy {
+	struct clk		*clk_bus;
+	struct clk		*clk_mod;
+	struct clk		*clk_tmds;
+	struct regmap		*regs;
+	struct reset_control	*rst_phy;
+};
+
+struct sun8i_dw_hdmi {
+	struct device			*dev;
+	struct dw_hdmi			*hdmi;
+	struct drm_encoder		encoder;
+	struct sun8i_hdmi_phy		*phy;
+	struct dw_hdmi_plat_data	plat_data;
+	struct reset_control		*rst_ctrl;
+};
+
+static inline struct sun8i_dw_hdmi *
+encoder_to_sun8i_dw_hdmi(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct sun8i_dw_hdmi, encoder);
+}
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node);
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi);
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy);
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void);
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate);
+
+#endif /* _SUN8I_DW_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
new file mode 100644
index 000000000000..2555e488c5c5
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
+ */
+
+#include <linux/of_address.h>
+
+#include "sun8i_dw_hdmi.h"
+
+#define SUN8I_HDMI_PHY_DBG_CTRL_REG	0x0000
+#define SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK		BIT(0)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK	GENMASK(15, 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL(val)	(val << 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK	GENMASK(23, 16)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR(addr)	(addr << 16)
+
+#define SUN8I_HDMI_PHY_REXT_CTRL_REG	0x0004
+#define SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN	BIT(31)
+
+#define SUN8I_HDMI_PHY_READ_EN_REG	0x0010
+#define SUN8I_HDMI_PHY_READ_EN_MAGIC		0x54524545
+
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_REG	0x0014
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC		0x42494E47
+
+/*
+ * Address can be actually any value. Here is set to same value as
+ * it is set in BSP driver.
+ */
+#define I2C_ADDR	0x69
+
+static int sun8i_hdmi_phy_config(struct dw_hdmi *hdmi, void *data,
+				 struct drm_display_mode *mode)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+	u32 val = 0;
+	int ret;
+
+	ret = clk_enable(phy->clk_tmds);
+	if (ret)
+		return ret;
+
+	if ((mode->flags & DRM_MODE_FLAG_NHSYNC) &&
+	    (mode->flags & DRM_MODE_FLAG_NHSYNC)) {
+		val = 0x03;
+	}
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL(val));
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN);
+
+	/* power down */
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	dw_hdmi_phy_reset(hdmi);
+
+	dw_hdmi_phy_gen2_pddq(hdmi, 0);
+
+	dw_hdmi_phy_i2c_set_addr(hdmi, I2C_ADDR);
+
+	/*
+	 * Values are taken from BSP HDMI driver. Although AW didn't
+	 * release any documentation, explanation of this values can
+	 * be found in i.MX 6Dual/6Quad Reference Manual.
+	 */
+	if (mode->crtc_clock <= 27000) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x01e0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x08da, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0318, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 74250) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0540, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0005, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x02b5, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 148500) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x04a0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000a, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0021, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8029, 0x09);
+	} else {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000f, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x802b, 0x09);
+	}
+
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x1e);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x17);
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
+
+	return 0;
+};
+
+static void sun8i_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN, 0);
+
+	clk_disable(phy->clk_tmds);
+}
+
+static const struct dw_hdmi_phy_ops sun8i_hdmi_phy_ops = {
+	.init = &sun8i_hdmi_phy_config,
+	.disable = &sun8i_hdmi_phy_disable,
+	.read_hpd = &dw_hdmi_phy_read_hpd,
+	.update_hpd = &dw_hdmi_phy_update_hpd,
+	.setup_hpd = &dw_hdmi_phy_setup_hpd,
+};
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy)
+{
+	/* enable read access to HDMI controller */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_READ_EN_REG,
+		     SUN8I_HDMI_PHY_READ_EN_MAGIC);
+
+	/* unscramble register offsets */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+		     SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK);
+
+	/*
+	 * Set PHY I2C address. It must match to the address set by
+	 * dw_hdmi_phy_set_slave_addr().
+	 */
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR(I2C_ADDR));
+}
+
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void)
+{
+	return &sun8i_hdmi_phy_ops;
+}
+
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate)
+{
+	clk_set_rate(phy->clk_tmds, rate);
+}
+
+static struct regmap_config sun8i_hdmi_phy_regmap_config = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+	.name		= "phy"
+};
+
+static const struct of_device_id sun8i_hdmi_phy_of_table[] = {
+	{ .compatible = "allwinner,sun8i-a83t-hdmi-phy" },
+	{ /* sentinel */ }
+};
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
+{
+	struct device *dev = hdmi->dev;
+	struct sun8i_hdmi_phy *phy;
+	struct resource res;
+	void __iomem *regs;
+	int ret;
+
+	if (!of_match_node(sun8i_hdmi_phy_of_table, node)) {
+		dev_err(dev, "Incompatible HDMI PHY\n");
+		return -EINVAL;
+	}
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	ret = of_address_to_resource(node, 0, &res);
+	if (ret) {
+		dev_err(dev, "phy: Couldn't get our resources\n");
+		return ret;
+	}
+
+	regs = devm_ioremap_resource(dev, &res);
+	if (IS_ERR(regs)) {
+		dev_err(dev, "Couldn't map the HDMI PHY registers\n");
+		return PTR_ERR(regs);
+	}
+
+	phy->regs = devm_regmap_init_mmio(dev, regs,
+					  &sun8i_hdmi_phy_regmap_config);
+	if (IS_ERR(phy->regs)) {
+		dev_err(dev, "Couldn't create the HDMI PHY regmap\n");
+		return PTR_ERR(phy->regs);
+	}
+
+	phy->clk_bus = of_clk_get_by_name(node, "bus");
+	if (IS_ERR(phy->clk_bus)) {
+		dev_err(dev, "Could not get bus clock\n");
+		return PTR_ERR(phy->clk_bus);
+	}
+
+	phy->clk_mod = of_clk_get_by_name(node, "mod");
+	if (IS_ERR(phy->clk_mod)) {
+		dev_err(dev, "Could not get mod clock\n");
+		ret = PTR_ERR(phy->clk_mod);
+		goto err_put_clk_bus;
+	}
+
+	phy->clk_tmds = of_clk_get_by_name(node, "tmds");
+	if (IS_ERR(phy->clk_tmds)) {
+		dev_err(dev, "Could not get tmds clock\n");
+		ret = PTR_ERR(phy->clk_tmds);
+		goto err_put_clk_mod;
+	}
+
+	phy->rst_phy = of_reset_control_get_shared(node, "phy");
+	if (IS_ERR(phy->rst_phy)) {
+		dev_err(dev, "Could not get phy reset control\n");
+		ret = PTR_ERR(phy->rst_phy);
+		goto err_put_clk_tmds;
+	}
+
+	ret = reset_control_deassert(phy->rst_phy);
+	if (ret) {
+		dev_err(dev, "Cannot deassert phy reset control: %d\n", ret);
+		goto err_put_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_bus);
+	if (ret) {
+		dev_err(dev, "Cannot enable bus clock: %d\n", ret);
+		goto err_deassert_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_mod);
+	if (ret) {
+		dev_err(dev, "Cannot enable mod clock: %d\n", ret);
+		goto err_disable_clk_bus;
+	}
+
+	ret = clk_prepare(phy->clk_tmds);
+	if (ret) {
+		dev_err(dev, "Cannot prepare tmds clock: %d\n", ret);
+		goto err_disable_clk_mod;
+	}
+
+	hdmi->phy = phy;
+
+	return 0;
+
+err_disable_clk_mod:
+	clk_disable_unprepare(phy->clk_mod);
+err_disable_clk_bus:
+	clk_disable_unprepare(phy->clk_bus);
+err_deassert_rst_phy:
+	reset_control_assert(phy->rst_phy);
+err_put_rst_phy:
+	reset_control_put(phy->rst_phy);
+err_put_clk_tmds:
+	clk_put(phy->clk_tmds);
+err_put_clk_mod:
+	clk_put(phy->clk_mod);
+err_put_clk_bus:
+	clk_put(phy->clk_bus);
+
+	return ret;
+}
+
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi)
+{
+	struct sun8i_hdmi_phy *phy = hdmi->phy;
+
+	clk_unprepare(phy->clk_tmds);
+	clk_disable_unprepare(phy->clk_mod);
+	clk_disable_unprepare(phy->clk_bus);
+
+	reset_control_assert(phy->rst_phy);
+
+	reset_control_put(phy->rst_phy);
+
+	clk_put(phy->clk_tmds);
+	clk_put(phy->clk_mod);
+	clk_put(phy->clk_bus);
+}
-- 
2.15.1

[PATCH v3 10/12] drm/sun4i: Implement A83T HDMI driver

[Jernej Skrabec]

A83T has DW HDMI IP block with a custom PHY similar to Synopsys gen2
HDMI PHY.

Only video output was tested, while HW also supports audio and CEC.
Support for them will be added later.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 drivers/gpu/drm/sun4i/Kconfig          |   9 +
 drivers/gpu/drm/sun4i/Makefile         |   4 +
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c  | 181 ++++++++++++++++++++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h  |  46 +++++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c | 302 +++++++++++++++++++++++++++++++++
 5 files changed, 542 insertions(+)
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
 create mode 100644 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 882d85db9053..7327da3bc94f 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -40,6 +40,15 @@ config DRM_SUN4I_BACKEND
 	  do some alpha blending and feed graphics to TCON. If M is
 	  selected the module will be called sun4i-backend.
 
+config DRM_SUN8I_DW_HDMI
+	tristate "Support for Allwinner version of DesignWare HDMI"
+	depends on DRM_SUN4I
+	select DRM_DW_HDMI
+	help
+	  Choose this option if you have an Allwinner SoC with the
+	  DesignWare HDMI controller with custom HDMI PHY. If M is
+	  selected the module will be called sun8i_dw_hdmi.
+
 config DRM_SUN8I_MIXER
 	tristate "Support for Allwinner Display Engine 2.0 Mixer"
 	default MACH_SUN8I
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 2b37a6abbb1d..a7c47d9aa64d 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -9,6 +9,9 @@ sun4i-drm-hdmi-y		+= sun4i_hdmi_enc.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_i2c.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_tmds_clk.o
 
+sun8i-drm-hdmi-y		+= sun8i_dw_hdmi.o
+sun8i-drm-hdmi-y		+= sun8i_hdmi_phy.o
+
 sun8i-mixer-y			+= sun8i_mixer.o sun8i_ui_layer.o \
 				   sun8i_vi_layer.o sun8i_ui_scaler.o \
 				   sun8i_vi_scaler.o sun8i_csc.o
@@ -26,4 +29,5 @@ obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
 
 obj-$(CONFIG_DRM_SUN4I_BACKEND)	+= sun4i-backend.o
 obj-$(CONFIG_DRM_SUN4I_HDMI)	+= sun4i-drm-hdmi.o
+obj-$(CONFIG_DRM_SUN8I_DW_HDMI)	+= sun8i-drm-hdmi.o
 obj-$(CONFIG_DRM_SUN8I_MIXER)	+= sun8i-mixer.o
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
new file mode 100644
index 000000000000..12b73ced9517
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c
@@ -0,0 +1,181 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <drm/drm_of.h>
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "sun8i_dw_hdmi.h"
+
+static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder,
+					   struct drm_display_mode *mode,
+					   struct drm_display_mode *adj_mode)
+{
+	struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder);
+
+	sun8i_hdmi_phy_update_clock(hdmi->phy, mode->crtc_clock * 1000);
+}
+
+static const struct drm_encoder_helper_funcs
+sun8i_dw_hdmi_encoder_helper_funcs = {
+	.mode_set = sun8i_dw_hdmi_encoder_mode_set,
+};
+
+static const struct drm_encoder_funcs sun8i_dw_hdmi_encoder_funcs = {
+	.destroy = drm_encoder_cleanup,
+};
+
+static enum drm_mode_status
+sun8i_dw_hdmi_mode_valid(struct drm_connector *connector,
+			 const struct drm_display_mode *mode)
+{
+	if (mode->clock > 297000)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
+static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master,
+			      void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_hdmi_plat_data *plat_data;
+	struct drm_device *drm = data;
+	struct device_node *phy_node;
+	struct drm_encoder *encoder;
+	struct sun8i_dw_hdmi *hdmi;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
+	if (!hdmi)
+		return -ENOMEM;
+
+	plat_data = &hdmi->plat_data;
+	hdmi->dev = &pdev->dev;
+	encoder = &hdmi->encoder;
+
+	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+	/*
+	 * If we failed to find the CRTC(s) which this encoder is
+	 * supposed to be connected to, it's because the CRTC has
+	 * not been registered yet.  Defer probing, and hope that
+	 * the required CRTC is added later.
+	 */
+	if (encoder->possible_crtcs == 0)
+		return -EPROBE_DEFER;
+
+	hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl");
+	if (IS_ERR(hdmi->rst_ctrl)) {
+		dev_err(dev, "Could not get ctrl reset control\n");
+		return PTR_ERR(hdmi->rst_ctrl);
+	}
+
+	ret = reset_control_deassert(hdmi->rst_ctrl);
+	if (ret) {
+		dev_err(dev, "Could not deassert ctrl reset control\n");
+		return ret;
+	}
+
+	phy_node = of_parse_phandle(dev->of_node, "phys", 0);
+	if (!phy_node) {
+		dev_err(dev, "Can't found PHY phandle\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	ret = sun8i_hdmi_phy_probe(hdmi, phy_node);
+	of_node_put(phy_node);
+	if (ret) {
+		dev_err(dev, "Couldn't get the HDMI PHY\n");
+		goto err_assert_ctrl_reset;
+	}
+
+	drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs);
+	drm_encoder_init(drm, encoder, &sun8i_dw_hdmi_encoder_funcs,
+			 DRM_MODE_ENCODER_TMDS, NULL);
+
+	sun8i_hdmi_phy_init(hdmi->phy);
+
+	plat_data->mode_valid = &sun8i_dw_hdmi_mode_valid;
+	plat_data->phy_ops = sun8i_hdmi_phy_get_ops();
+	plat_data->phy_name = "sun8i_dw_hdmi_phy";
+	plat_data->phy_data = hdmi->phy;
+
+	platform_set_drvdata(pdev, hdmi);
+
+	hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data);
+
+	/*
+	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
+	 * which would have called the encoder cleanup.  Do it manually.
+	 */
+	if (IS_ERR(hdmi->hdmi)) {
+		ret = PTR_ERR(hdmi->hdmi);
+		goto cleanup_encoder;
+	}
+
+	return 0;
+
+cleanup_encoder:
+	drm_encoder_cleanup(encoder);
+	sun8i_hdmi_phy_remove(hdmi);
+err_assert_ctrl_reset:
+	reset_control_assert(hdmi->rst_ctrl);
+
+	return ret;
+}
+
+static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master,
+				 void *data)
+{
+	struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev);
+
+	dw_hdmi_unbind(hdmi->hdmi);
+	sun8i_hdmi_phy_remove(hdmi);
+	reset_control_assert(hdmi->rst_ctrl);
+}
+
+static const struct component_ops sun8i_dw_hdmi_ops = {
+	.bind	= sun8i_dw_hdmi_bind,
+	.unbind	= sun8i_dw_hdmi_unbind,
+};
+
+static int sun8i_dw_hdmi_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &sun8i_dw_hdmi_ops);
+}
+
+static int sun8i_dw_hdmi_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &sun8i_dw_hdmi_ops);
+
+	return 0;
+}
+
+static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = {
+	{ .compatible = "allwinner,sun8i-a83t-dw-hdmi" },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids);
+
+struct platform_driver sun8i_dw_hdmi_pltfm_driver = {
+	.probe  = sun8i_dw_hdmi_probe,
+	.remove = sun8i_dw_hdmi_remove,
+	.driver = {
+		.name = "sun8i-dw-hdmi",
+		.of_match_table = sun8i_dw_hdmi_dt_ids,
+	},
+};
+module_platform_driver(sun8i_dw_hdmi_pltfm_driver);
+
+MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>");
+MODULE_DESCRIPTION("Allwinner DW HDMI bridge");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
new file mode 100644
index 000000000000..007abab1ba29
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h
@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#ifndef _SUN8I_DW_HDMI_H_
+#define _SUN8I_DW_HDMI_H_
+
+#include <drm/bridge/dw_hdmi.h>
+#include <drm/drm_encoder.h>
+#include <linux/clk.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+
+struct sun8i_hdmi_phy {
+	struct clk		*clk_bus;
+	struct clk		*clk_mod;
+	struct clk		*clk_tmds;
+	struct regmap		*regs;
+	struct reset_control	*rst_phy;
+};
+
+struct sun8i_dw_hdmi {
+	struct device			*dev;
+	struct dw_hdmi			*hdmi;
+	struct drm_encoder		encoder;
+	struct sun8i_hdmi_phy		*phy;
+	struct dw_hdmi_plat_data	plat_data;
+	struct reset_control		*rst_ctrl;
+};
+
+static inline struct sun8i_dw_hdmi *
+encoder_to_sun8i_dw_hdmi(struct drm_encoder *encoder)
+{
+	return container_of(encoder, struct sun8i_dw_hdmi, encoder);
+}
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node);
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi);
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy);
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void);
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate);
+
+#endif /* _SUN8I_DW_HDMI_H_ */
diff --git a/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
new file mode 100644
index 000000000000..2555e488c5c5
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net>
+ */
+
+#include <linux/of_address.h>
+
+#include "sun8i_dw_hdmi.h"
+
+#define SUN8I_HDMI_PHY_DBG_CTRL_REG	0x0000
+#define SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK		BIT(0)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK	GENMASK(15, 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_POL(val)	(val << 8)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK	GENMASK(23, 16)
+#define SUN8I_HDMI_PHY_DBG_CTRL_ADDR(addr)	(addr << 16)
+
+#define SUN8I_HDMI_PHY_REXT_CTRL_REG	0x0004
+#define SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN	BIT(31)
+
+#define SUN8I_HDMI_PHY_READ_EN_REG	0x0010
+#define SUN8I_HDMI_PHY_READ_EN_MAGIC		0x54524545
+
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_REG	0x0014
+#define SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC		0x42494E47
+
+/*
+ * Address can be actually any value. Here is set to same value as
+ * it is set in BSP driver.
+ */
+#define I2C_ADDR	0x69
+
+static int sun8i_hdmi_phy_config(struct dw_hdmi *hdmi, void *data,
+				 struct drm_display_mode *mode)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+	u32 val = 0;
+	int ret;
+
+	ret = clk_enable(phy->clk_tmds);
+	if (ret)
+		return ret;
+
+	if ((mode->flags & DRM_MODE_FLAG_NHSYNC) &&
+	    (mode->flags & DRM_MODE_FLAG_NHSYNC)) {
+		val = 0x03;
+	}
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_POL(val));
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN);
+
+	/* power down */
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	dw_hdmi_phy_reset(hdmi);
+
+	dw_hdmi_phy_gen2_pddq(hdmi, 0);
+
+	dw_hdmi_phy_i2c_set_addr(hdmi, I2C_ADDR);
+
+	/*
+	 * Values are taken from BSP HDMI driver. Although AW didn't
+	 * release any documentation, explanation of this values can
+	 * be found in i.MX 6Dual/6Quad Reference Manual.
+	 */
+	if (mode->crtc_clock <= 27000) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x01e0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x08da, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0318, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 74250) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0540, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0005, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0007, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x02b5, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8009, 0x09);
+	} else if (mode->crtc_clock <= 148500) {
+		dw_hdmi_phy_i2c_write(hdmi, 0x04a0, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000a, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0021, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x8029, 0x09);
+	} else {
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x06);
+		dw_hdmi_phy_i2c_write(hdmi, 0x000f, 0x15);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x10);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0002, 0x19);
+		dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x0e);
+		dw_hdmi_phy_i2c_write(hdmi, 0x802b, 0x09);
+	}
+
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x1e);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);
+	dw_hdmi_phy_i2c_write(hdmi, 0x0000, 0x17);
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 1);
+
+	return 0;
+};
+
+static void sun8i_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
+{
+	struct sun8i_hdmi_phy *phy = (struct sun8i_hdmi_phy *)data;
+
+	dw_hdmi_phy_gen2_txpwron(hdmi, 0);
+	dw_hdmi_phy_gen2_pddq(hdmi, 1);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_REXT_CTRL_REG,
+			   SUN8I_HDMI_PHY_REXT_CTRL_REXT_EN, 0);
+
+	clk_disable(phy->clk_tmds);
+}
+
+static const struct dw_hdmi_phy_ops sun8i_hdmi_phy_ops = {
+	.init = &sun8i_hdmi_phy_config,
+	.disable = &sun8i_hdmi_phy_disable,
+	.read_hpd = &dw_hdmi_phy_read_hpd,
+	.update_hpd = &dw_hdmi_phy_update_hpd,
+	.setup_hpd = &dw_hdmi_phy_setup_hpd,
+};
+
+void sun8i_hdmi_phy_init(struct sun8i_hdmi_phy *phy)
+{
+	/* enable read access to HDMI controller */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_READ_EN_REG,
+		     SUN8I_HDMI_PHY_READ_EN_MAGIC);
+
+	/* unscramble register offsets */
+	regmap_write(phy->regs, SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+		     SUN8I_HDMI_PHY_UNSCRAMBLE_MAGIC);
+
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_PX_LOCK);
+
+	/*
+	 * Set PHY I2C address. It must match to the address set by
+	 * dw_hdmi_phy_set_slave_addr().
+	 */
+	regmap_update_bits(phy->regs, SUN8I_HDMI_PHY_DBG_CTRL_REG,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR_MASK,
+			   SUN8I_HDMI_PHY_DBG_CTRL_ADDR(I2C_ADDR));
+}
+
+const struct dw_hdmi_phy_ops *sun8i_hdmi_phy_get_ops(void)
+{
+	return &sun8i_hdmi_phy_ops;
+}
+
+void sun8i_hdmi_phy_update_clock(struct sun8i_hdmi_phy *phy,
+				 unsigned long rate)
+{
+	clk_set_rate(phy->clk_tmds, rate);
+}
+
+static struct regmap_config sun8i_hdmi_phy_regmap_config = {
+	.reg_bits	= 32,
+	.val_bits	= 32,
+	.reg_stride	= 4,
+	.max_register	= SUN8I_HDMI_PHY_UNSCRAMBLE_REG,
+	.name		= "phy"
+};
+
+static const struct of_device_id sun8i_hdmi_phy_of_table[] = {
+	{ .compatible = "allwinner,sun8i-a83t-hdmi-phy" },
+	{ /* sentinel */ }
+};
+
+int sun8i_hdmi_phy_probe(struct sun8i_dw_hdmi *hdmi, struct device_node *node)
+{
+	struct device *dev = hdmi->dev;
+	struct sun8i_hdmi_phy *phy;
+	struct resource res;
+	void __iomem *regs;
+	int ret;
+
+	if (!of_match_node(sun8i_hdmi_phy_of_table, node)) {
+		dev_err(dev, "Incompatible HDMI PHY\n");
+		return -EINVAL;
+	}
+
+	phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+	if (!phy)
+		return -ENOMEM;
+
+	ret = of_address_to_resource(node, 0, &res);
+	if (ret) {
+		dev_err(dev, "phy: Couldn't get our resources\n");
+		return ret;
+	}
+
+	regs = devm_ioremap_resource(dev, &res);
+	if (IS_ERR(regs)) {
+		dev_err(dev, "Couldn't map the HDMI PHY registers\n");
+		return PTR_ERR(regs);
+	}
+
+	phy->regs = devm_regmap_init_mmio(dev, regs,
+					  &sun8i_hdmi_phy_regmap_config);
+	if (IS_ERR(phy->regs)) {
+		dev_err(dev, "Couldn't create the HDMI PHY regmap\n");
+		return PTR_ERR(phy->regs);
+	}
+
+	phy->clk_bus = of_clk_get_by_name(node, "bus");
+	if (IS_ERR(phy->clk_bus)) {
+		dev_err(dev, "Could not get bus clock\n");
+		return PTR_ERR(phy->clk_bus);
+	}
+
+	phy->clk_mod = of_clk_get_by_name(node, "mod");
+	if (IS_ERR(phy->clk_mod)) {
+		dev_err(dev, "Could not get mod clock\n");
+		ret = PTR_ERR(phy->clk_mod);
+		goto err_put_clk_bus;
+	}
+
+	phy->clk_tmds = of_clk_get_by_name(node, "tmds");
+	if (IS_ERR(phy->clk_tmds)) {
+		dev_err(dev, "Could not get tmds clock\n");
+		ret = PTR_ERR(phy->clk_tmds);
+		goto err_put_clk_mod;
+	}
+
+	phy->rst_phy = of_reset_control_get_shared(node, "phy");
+	if (IS_ERR(phy->rst_phy)) {
+		dev_err(dev, "Could not get phy reset control\n");
+		ret = PTR_ERR(phy->rst_phy);
+		goto err_put_clk_tmds;
+	}
+
+	ret = reset_control_deassert(phy->rst_phy);
+	if (ret) {
+		dev_err(dev, "Cannot deassert phy reset control: %d\n", ret);
+		goto err_put_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_bus);
+	if (ret) {
+		dev_err(dev, "Cannot enable bus clock: %d\n", ret);
+		goto err_deassert_rst_phy;
+	}
+
+	ret = clk_prepare_enable(phy->clk_mod);
+	if (ret) {
+		dev_err(dev, "Cannot enable mod clock: %d\n", ret);
+		goto err_disable_clk_bus;
+	}
+
+	ret = clk_prepare(phy->clk_tmds);
+	if (ret) {
+		dev_err(dev, "Cannot prepare tmds clock: %d\n", ret);
+		goto err_disable_clk_mod;
+	}
+
+	hdmi->phy = phy;
+
+	return 0;
+
+err_disable_clk_mod:
+	clk_disable_unprepare(phy->clk_mod);
+err_disable_clk_bus:
+	clk_disable_unprepare(phy->clk_bus);
+err_deassert_rst_phy:
+	reset_control_assert(phy->rst_phy);
+err_put_rst_phy:
+	reset_control_put(phy->rst_phy);
+err_put_clk_tmds:
+	clk_put(phy->clk_tmds);
+err_put_clk_mod:
+	clk_put(phy->clk_mod);
+err_put_clk_bus:
+	clk_put(phy->clk_bus);
+
+	return ret;
+}
+
+void sun8i_hdmi_phy_remove(struct sun8i_dw_hdmi *hdmi)
+{
+	struct sun8i_hdmi_phy *phy = hdmi->phy;
+
+	clk_unprepare(phy->clk_tmds);
+	clk_disable_unprepare(phy->clk_mod);
+	clk_disable_unprepare(phy->clk_bus);
+
+	reset_control_assert(phy->rst_phy);
+
+	reset_control_put(phy->rst_phy);
+
+	clk_put(phy->clk_tmds);
+	clk_put(phy->clk_mod);
+	clk_put(phy->clk_bus);
+}
-- 
2.15.1

[PATCH v3 11/12] ARM: dts: sun8i: a83t: Add HDMI display pipeline

[Jernej Skrabec]

This commit adds all bits necessary for HDMI on A83T - mixer1, tcon1,
hdmi, hdmi phy and hdmi pinctrl entries.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 arch/arm/boot/dts/sun8i-a83t.dtsi | 119 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 118 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index 7f4955a5fab7..c2638966d338 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -155,7 +155,7 @@
 
 	de: display-engine {
 		compatible = "allwinner,sun8i-a83t-display-engine";
-		allwinner,pipelines = <&mixer0>;
+		allwinner,pipelines = <&mixer0>, <&mixer1>;
 		status = "disabled";
 	};
 
@@ -208,6 +208,32 @@
 			};
 		};
 
+		mixer1: mixer@1200000 {
+			compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+			reg = <0x01200000 0x100000>;
+			clocks = <&display_clocks CLK_BUS_MIXER1>,
+				 <&display_clocks CLK_MIXER1>;
+			clock-names = "bus",
+				      "mod";
+			resets = <&display_clocks RST_WB>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				mixer1_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					mixer1_out_tcon1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_in_mixer1>;
+					};
+				};
+			};
+		};
+
 		syscon: syscon@1c00000 {
 			compatible = "allwinner,sun8i-a83t-system-controller",
 				"syscon";
@@ -256,6 +282,43 @@
 			};
 		};
 
+		tcon1: lcd-controller@1c0d000 {
+			compatible = "allwinner,sun8i-a83t-tcon-tv";
+			reg = <0x01c0d000 0x1000>;
+			interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+			clock-names = "ahb", "tcon-ch1";
+			resets = <&ccu RST_BUS_TCON1>;
+			reset-names = "lcd";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon1_in: port@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					tcon1_in_mixer1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&mixer1_out_tcon1>;
+					};
+				};
+
+				tcon1_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					tcon1_out_hdmi: endpoint@1 {
+						reg = <1>;
+						remote-endpoint = <&hdmi_in_tcon1>;
+					};
+				};
+			};
+		};
+
 		mmc0: mmc@1c0f000 {
 			compatible = "allwinner,sun8i-a83t-mmc",
 				     "allwinner,sun7i-a20-mmc";
@@ -427,6 +490,11 @@
 				drive-strength = <40>;
 			};
 
+			hdmi_pins: hdmi-pins {
+				pins = "PH6", "PH7", "PH8";
+				function = "hdmi";
+			};
+
 			i2c0_pins: i2c0-pins {
 				pins = "PH0", "PH1";
 				function = "i2c0";
@@ -685,6 +753,55 @@
 			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		hdmi: hdmi@1ee0000 {
+			compatible = "allwinner,sun8i-a83t-dw-hdmi";
+			reg = <0x01ee0000 0x10000>;
+			reg-io-width = <1>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+			clock-names = "iahb", "isfr";
+			resets = <&ccu RST_BUS_HDMI1>;
+			reset-names = "ctrl";
+			phys = <&hdmi_phy>;
+			phy-names = "hdmi-phy";
+			pinctrl-names = "default";
+			pinctrl-0 = <&hdmi_pins>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				hdmi_in: port@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					hdmi_in_tcon1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_out_hdmi>;
+					};
+				};
+
+				hdmi_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+				};
+			};
+		};
+
+		hdmi_phy: hdmi-phy@1ef0000 {
+			compatible = "allwinner,sun8i-a83t-hdmi-phy";
+			reg = <0x01ef0000 0x10000>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+				 <&ccu CLK_HDMI>;
+			clock-names = "bus", "mod", "tmds";
+			resets = <&ccu RST_BUS_HDMI0>;
+			reset-names = "phy";
+			#phy-cells = <0>;
+		};
+
 		r_intc: interrupt-controller@1f00c00 {
 			compatible = "allwinner,sun8i-a83t-r-intc",
 				     "allwinner,sun6i-a31-r-intc";
-- 
2.15.1

[PATCH v3 11/12] ARM: dts: sun8i: a83t: Add HDMI display pipeline

[Jernej Skrabec]

This commit adds all bits necessary for HDMI on A83T - mixer1, tcon1,
hdmi, hdmi phy and hdmi pinctrl entries.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 arch/arm/boot/dts/sun8i-a83t.dtsi | 119 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 118 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index 7f4955a5fab7..c2638966d338 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -155,7 +155,7 @@
 
 	de: display-engine {
 		compatible = "allwinner,sun8i-a83t-display-engine";
-		allwinner,pipelines = <&mixer0>;
+		allwinner,pipelines = <&mixer0>, <&mixer1>;
 		status = "disabled";
 	};
 
@@ -208,6 +208,32 @@
 			};
 		};
 
+		mixer1: mixer@1200000 {
+			compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+			reg = <0x01200000 0x100000>;
+			clocks = <&display_clocks CLK_BUS_MIXER1>,
+				 <&display_clocks CLK_MIXER1>;
+			clock-names = "bus",
+				      "mod";
+			resets = <&display_clocks RST_WB>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				mixer1_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					mixer1_out_tcon1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_in_mixer1>;
+					};
+				};
+			};
+		};
+
 		syscon: syscon@1c00000 {
 			compatible = "allwinner,sun8i-a83t-system-controller",
 				"syscon";
@@ -256,6 +282,43 @@
 			};
 		};
 
+		tcon1: lcd-controller@1c0d000 {
+			compatible = "allwinner,sun8i-a83t-tcon-tv";
+			reg = <0x01c0d000 0x1000>;
+			interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+			clock-names = "ahb", "tcon-ch1";
+			resets = <&ccu RST_BUS_TCON1>;
+			reset-names = "lcd";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon1_in: port@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					tcon1_in_mixer1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&mixer1_out_tcon1>;
+					};
+				};
+
+				tcon1_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					tcon1_out_hdmi: endpoint@1 {
+						reg = <1>;
+						remote-endpoint = <&hdmi_in_tcon1>;
+					};
+				};
+			};
+		};
+
 		mmc0: mmc@1c0f000 {
 			compatible = "allwinner,sun8i-a83t-mmc",
 				     "allwinner,sun7i-a20-mmc";
@@ -427,6 +490,11 @@
 				drive-strength = <40>;
 			};
 
+			hdmi_pins: hdmi-pins {
+				pins = "PH6", "PH7", "PH8";
+				function = "hdmi";
+			};
+
 			i2c0_pins: i2c0-pins {
 				pins = "PH0", "PH1";
 				function = "i2c0";
@@ -685,6 +753,55 @@
 			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		hdmi: hdmi@1ee0000 {
+			compatible = "allwinner,sun8i-a83t-dw-hdmi";
+			reg = <0x01ee0000 0x10000>;
+			reg-io-width = <1>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+			clock-names = "iahb", "isfr";
+			resets = <&ccu RST_BUS_HDMI1>;
+			reset-names = "ctrl";
+			phys = <&hdmi_phy>;
+			phy-names = "hdmi-phy";
+			pinctrl-names = "default";
+			pinctrl-0 = <&hdmi_pins>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				hdmi_in: port@0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					hdmi_in_tcon1: endpoint@0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_out_hdmi>;
+					};
+				};
+
+				hdmi_out: port@1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+				};
+			};
+		};
+
+		hdmi_phy: hdmi-phy@1ef0000 {
+			compatible = "allwinner,sun8i-a83t-hdmi-phy";
+			reg = <0x01ef0000 0x10000>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+				 <&ccu CLK_HDMI>;
+			clock-names = "bus", "mod", "tmds";
+			resets = <&ccu RST_BUS_HDMI0>;
+			reset-names = "phy";
+			#phy-cells = <0>;
+		};
+
 		r_intc: interrupt-controller@1f00c00 {
 			compatible = "allwinner,sun8i-a83t-r-intc",
 				     "allwinner,sun6i-a31-r-intc";
-- 
2.15.1

[PATCH v3 11/12] ARM: dts: sun8i: a83t: Add HDMI display pipeline

[Jernej Skrabec]

This commit adds all bits necessary for HDMI on A83T - mixer1, tcon1,
hdmi, hdmi phy and hdmi pinctrl entries.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 arch/arm/boot/dts/sun8i-a83t.dtsi | 119 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 118 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index 7f4955a5fab7..c2638966d338 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -155,7 +155,7 @@
 
 	de: display-engine {
 		compatible = "allwinner,sun8i-a83t-display-engine";
-		allwinner,pipelines = <&mixer0>;
+		allwinner,pipelines = <&mixer0>, <&mixer1>;
 		status = "disabled";
 	};
 
@@ -208,6 +208,32 @@
 			};
 		};
 
+		mixer1: mixer at 1200000 {
+			compatible = "allwinner,sun8i-a83t-de2-mixer-1";
+			reg = <0x01200000 0x100000>;
+			clocks = <&display_clocks CLK_BUS_MIXER1>,
+				 <&display_clocks CLK_MIXER1>;
+			clock-names = "bus",
+				      "mod";
+			resets = <&display_clocks RST_WB>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				mixer1_out: port at 1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					mixer1_out_tcon1: endpoint at 0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_in_mixer1>;
+					};
+				};
+			};
+		};
+
 		syscon: syscon at 1c00000 {
 			compatible = "allwinner,sun8i-a83t-system-controller",
 				"syscon";
@@ -256,6 +282,43 @@
 			};
 		};
 
+		tcon1: lcd-controller at 1c0d000 {
+			compatible = "allwinner,sun8i-a83t-tcon-tv";
+			reg = <0x01c0d000 0x1000>;
+			interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_TCON1>, <&ccu CLK_TCON1>;
+			clock-names = "ahb", "tcon-ch1";
+			resets = <&ccu RST_BUS_TCON1>;
+			reset-names = "lcd";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				tcon1_in: port at 0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					tcon1_in_mixer1: endpoint at 0 {
+						reg = <0>;
+						remote-endpoint = <&mixer1_out_tcon1>;
+					};
+				};
+
+				tcon1_out: port at 1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+
+					tcon1_out_hdmi: endpoint at 1 {
+						reg = <1>;
+						remote-endpoint = <&hdmi_in_tcon1>;
+					};
+				};
+			};
+		};
+
 		mmc0: mmc at 1c0f000 {
 			compatible = "allwinner,sun8i-a83t-mmc",
 				     "allwinner,sun7i-a20-mmc";
@@ -427,6 +490,11 @@
 				drive-strength = <40>;
 			};
 
+			hdmi_pins: hdmi-pins {
+				pins = "PH6", "PH7", "PH8";
+				function = "hdmi";
+			};
+
 			i2c0_pins: i2c0-pins {
 				pins = "PH0", "PH1";
 				function = "i2c0";
@@ -685,6 +753,55 @@
 			interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		hdmi: hdmi at 1ee0000 {
+			compatible = "allwinner,sun8i-a83t-dw-hdmi";
+			reg = <0x01ee0000 0x10000>;
+			reg-io-width = <1>;
+			interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>;
+			clock-names = "iahb", "isfr";
+			resets = <&ccu RST_BUS_HDMI1>;
+			reset-names = "ctrl";
+			phys = <&hdmi_phy>;
+			phy-names = "hdmi-phy";
+			pinctrl-names = "default";
+			pinctrl-0 = <&hdmi_pins>;
+			status = "disabled";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				hdmi_in: port at 0 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <0>;
+
+					hdmi_in_tcon1: endpoint at 0 {
+						reg = <0>;
+						remote-endpoint = <&tcon1_out_hdmi>;
+					};
+				};
+
+				hdmi_out: port at 1 {
+					#address-cells = <1>;
+					#size-cells = <0>;
+					reg = <1>;
+				};
+			};
+		};
+
+		hdmi_phy: hdmi-phy at 1ef0000 {
+			compatible = "allwinner,sun8i-a83t-hdmi-phy";
+			reg = <0x01ef0000 0x10000>;
+			clocks = <&ccu CLK_BUS_HDMI>, <&ccu CLK_HDMI_SLOW>,
+				 <&ccu CLK_HDMI>;
+			clock-names = "bus", "mod", "tmds";
+			resets = <&ccu RST_BUS_HDMI0>;
+			reset-names = "phy";
+			#phy-cells = <0>;
+		};
+
 		r_intc: interrupt-controller at 1f00c00 {
 			compatible = "allwinner,sun8i-a83t-r-intc",
 				     "allwinner,sun6i-a31-r-intc";
-- 
2.15.1

[PATCH v3 12/12] ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

[Jernej Skrabec]

BananaPi M3 includes HDMI connector, so add support for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
index 6550bf0e594b..00e47423cd07 100644
--- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
@@ -60,6 +60,17 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con_in: endpoint {
+				remote-endpoint = <&hdmi_out_con>;
+			};
+		};
+	};
+
 	reg_usb1_vbus: reg-usb1-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "usb1-vbus";
@@ -82,6 +93,10 @@
 	};
 };
 
+&de {
+	status = "okay";
+};
+
 &ehci0 {
 	/* Terminus Tech FE 1.1s 4-port USB 2.0 hub here */
 	status = "okay";
@@ -100,6 +115,16 @@
 	status = "okay";
 };
 
+&hdmi {
+	status = "okay";
+};
+
+&hdmi_out {
+	hdmi_out_con: endpoint {
+		remote-endpoint = <&hdmi_con_in>;
+	};
+};
+
 &mdio {
 	rgmii_phy: ethernet-phy@1 {
 		compatible = "ethernet-phy-ieee802.3-c22";
-- 
2.15.1

[PATCH v3 12/12] ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

[Jernej Skrabec]

BananaPi M3 includes HDMI connector, so add support for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
---
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
index 6550bf0e594b..00e47423cd07 100644
--- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
@@ -60,6 +60,17 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con_in: endpoint {
+				remote-endpoint = <&hdmi_out_con>;
+			};
+		};
+	};
+
 	reg_usb1_vbus: reg-usb1-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "usb1-vbus";
@@ -82,6 +93,10 @@
 	};
 };
 
+&de {
+	status = "okay";
+};
+
 &ehci0 {
 	/* Terminus Tech FE 1.1s 4-port USB 2.0 hub here */
 	status = "okay";
@@ -100,6 +115,16 @@
 	status = "okay";
 };
 
+&hdmi {
+	status = "okay";
+};
+
+&hdmi_out {
+	hdmi_out_con: endpoint {
+		remote-endpoint = <&hdmi_con_in>;
+	};
+};
+
 &mdio {
 	rgmii_phy: ethernet-phy@1 {
 		compatible = "ethernet-phy-ieee802.3-c22";
-- 
2.15.1

[PATCH v3 12/12] ARM: dts: sun8i: a83t: Enable HDMI on BananaPi M3

[Jernej Skrabec]

BananaPi M3 includes HDMI connector, so add support for it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
---
 arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
index 6550bf0e594b..00e47423cd07 100644
--- a/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
+++ b/arch/arm/boot/dts/sun8i-a83t-bananapi-m3.dts
@@ -60,6 +60,17 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	connector {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi_con_in: endpoint {
+				remote-endpoint = <&hdmi_out_con>;
+			};
+		};
+	};
+
 	reg_usb1_vbus: reg-usb1-vbus {
 		compatible = "regulator-fixed";
 		regulator-name = "usb1-vbus";
@@ -82,6 +93,10 @@
 	};
 };
 
+&de {
+	status = "okay";
+};
+
 &ehci0 {
 	/* Terminus Tech FE 1.1s 4-port USB 2.0 hub here */
 	status = "okay";
@@ -100,6 +115,16 @@
 	status = "okay";
 };
 
+&hdmi {
+	status = "okay";
+};
+
+&hdmi_out {
+	hdmi_out_con: endpoint {
+		remote-endpoint = <&hdmi_con_in>;
+	};
+};
+
 &mdio {
 	rgmii_phy: ethernet-phy at 1 {
 		compatible = "ethernet-phy-ieee802.3-c22";
-- 
2.15.1

Re: [PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 860 bytes --]

On Wed, Jan 17, 2018 at 09:14:10PM +0100, Jernej Skrabec wrote:
> Currently, if one of the factors isn't present, bit 0 gets always set to
> 1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
> K is not specified, it's offset, width and shift is 0. Driver assumes
> that lowest value possible is 1, otherwise we would get division by 0.
> That situation causes that bit 0 is always set, which may change wanted
> clock rate.
> 
> Fix that by masking every factor according to it's specified width.
> Factors with width set to 0 won't have any influence to final register
> value.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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Re: [PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 911 bytes --]

On Wed, Jan 17, 2018 at 09:14:10PM +0100, Jernej Skrabec wrote:
> Currently, if one of the factors isn't present, bit 0 gets always set to
> 1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
> K is not specified, it's offset, width and shift is 0. Driver assumes
> that lowest value possible is 1, otherwise we would get division by 0.
> That situation causes that bit 0 is always set, which may change wanted
> clock rate.
> 
> Fix that by masking every factor according to it's specified width.
> Factors with width set to 0 won't have any influence to final register
> value.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>

Acked-by: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

[-- Attachment #2: signature.asc --]
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[PATCH v3 01/12] clk: sunxi-ng: Mask nkmp factors when setting register

[Maxime Ripard]

On Wed, Jan 17, 2018 at 09:14:10PM +0100, Jernej Skrabec wrote:
> Currently, if one of the factors isn't present, bit 0 gets always set to
> 1. For example, A83T has NMP PLLs modelled as NKMP PLL without K. Since
> K is not specified, it's offset, width and shift is 0. Driver assumes
> that lowest value possible is 1, otherwise we would get division by 0.
> That situation causes that bit 0 is always set, which may change wanted
> clock rate.
> 
> Fix that by masking every factor according to it's specified width.
> Factors with width set to 0 won't have any influence to final register
> value.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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Re: [PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1206 bytes --]

Hi,

On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> This commit changes formula from this:
> 
> Freq = (parent_freq * N * K) / (M * P)
> 
> to this:
> 
> Freq = (parent_freq / M) * N * K / P
> 
> This improves situation when N is in the range 1-255. PLL parent clock
> is almost always 24 MHz, which means that for N >= 180 original formula
> overflows and result becomes useless. Situation can be improved if M is
> used as predivider as it can be seen in the second formula. That way at
> least M > 1 is considered, but it still leaves small gap for wrong result
> when M = 1 and N >= 180.
> 
> Using M as predivider shouldn't cause any issue, because it is in range
> 1-4 at most, so there is no or only minimal rounding error.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>

I'd really prefer to stick to the formula documented and that we've
used so far. NKMP clocks are most notably used for the CPU PLLs and
I've debugged way too many cpufreq bugs already :)

What about using long long types for the parent * n * k result?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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Re: [PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1226 bytes --]

Hi,

On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> This commit changes formula from this:
> 
> Freq = (parent_freq * N * K) / (M * P)
> 
> to this:
> 
> Freq = (parent_freq / M) * N * K / P
> 
> This improves situation when N is in the range 1-255. PLL parent clock
> is almost always 24 MHz, which means that for N >= 180 original formula
> overflows and result becomes useless. Situation can be improved if M is
> used as predivider as it can be seen in the second formula. That way at
> least M > 1 is considered, but it still leaves small gap for wrong result
> when M = 1 and N >= 180.
> 
> Using M as predivider shouldn't cause any issue, because it is in range
> 1-4 at most, so there is no or only minimal rounding error.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>

I'd really prefer to stick to the formula documented and that we've
used so far. NKMP clocks are most notably used for the CPU PLLs and
I've debugged way too many cpufreq bugs already :)

What about using long long types for the parent * n * k result?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]

[PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Maxime Ripard]

Hi,

On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> This commit changes formula from this:
> 
> Freq = (parent_freq * N * K) / (M * P)
> 
> to this:
> 
> Freq = (parent_freq / M) * N * K / P
> 
> This improves situation when N is in the range 1-255. PLL parent clock
> is almost always 24 MHz, which means that for N >= 180 original formula
> overflows and result becomes useless. Situation can be improved if M is
> used as predivider as it can be seen in the second formula. That way at
> least M > 1 is considered, but it still leaves small gap for wrong result
> when M = 1 and N >= 180.
> 
> Using M as predivider shouldn't cause any issue, because it is in range
> 1-4 at most, so there is no or only minimal rounding error.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>

I'd really prefer to stick to the formula documented and that we've
used so far. NKMP clocks are most notably used for the CPU PLLs and
I've debugged way too many cpufreq bugs already :)

What about using long long types for the parent * n * k result?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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Re: [PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> dw_hdmi shouldn't set drvdata since some drivers might need to store
> it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
> instead to store it in drvdata. This way drivers are responsible to
> store and pass structure when needed.
> 
> Idea was taken from the following commit:
> 8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")
> 
> Cc: p.zabel@pengutronix.de
> Cc: narmstrong@baylibre.com
> Cc: Laurent.pinchart@ideasonboard.com
> Cc: hjc@rock-chips.com
> Cc: heiko@sntech.de
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
>  drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
>  drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
>  drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
>  include/drm/bridge/dw_hdmi.h                | 13 ++++++------
>  6 files changed, 60 insertions(+), 36 deletions(-)
> 

[...]
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index e8c3ef8a94ce..d49af17310c9 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,6 +140,7 @@ struct meson_dw_hdmi {
>  	struct clk *venci_clk;
>  	struct regulator *hdmi_supply;
>  	u32 irq_stat;
> +	struct dw_hdmi *hdmi;
>  };
>  #define encoder_to_meson_dw_hdmi(x) \
>  	container_of(x, struct meson_dw_hdmi, encoder)
> @@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
>  	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
>  
> -	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
> -	if (ret)
> -		return ret;
> +	platform_set_drvdata(pdev, meson_dw_hdmi);
> +
> +	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
> +					   &meson_dw_hdmi->dw_plat_data);
> +	if (IS_ERR(meson_dw_hdmi->hdmi))
> +		return PTR_ERR(meson_dw_hdmi->hdmi);
>  
>  	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>  
> @@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
>  				   void *data)
>  {
> -	dw_hdmi_unbind(dev);
> +	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
> +
> +	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
>  }
>  
>  static const struct component_ops meson_dw_hdmi_ops = {

[..]

> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index f3f3f0e1b2d3..dd2a8cf7d20b 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
>  			     unsigned long mpixelclock);
>  };
>  
> -int dw_hdmi_probe(struct platform_device *pdev,
> -		  const struct dw_hdmi_plat_data *plat_data);
> -void dw_hdmi_remove(struct platform_device *pdev);
> -void dw_hdmi_unbind(struct device *dev);
> -int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> -		 const struct dw_hdmi_plat_data *plat_data);
> +struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
> +			      const struct dw_hdmi_plat_data *plat_data);
> +void dw_hdmi_remove(struct dw_hdmi *hdmi);
> +void dw_hdmi_unbind(struct dw_hdmi *hdmi);
> +struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
> +			     struct drm_encoder *encoder,
> +			     const struct dw_hdmi_plat_data *plat_data);
>  
>  void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
>  
> 

For meson-drm and dw-hdmi bridge changes :
Acked-by: Neil Armstrong <narmstrong@baylibre.com>

Re: [PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> dw_hdmi shouldn't set drvdata since some drivers might need to store
> it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
> instead to store it in drvdata. This way drivers are responsible to
> store and pass structure when needed.
> 
> Idea was taken from the following commit:
> 8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")
> 
> Cc: p.zabel-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org
> Cc: narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org
> Cc: Laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org
> Cc: hjc-TNX95d0MmH7DzftRWevZcw@public.gmane.org
> Cc: heiko-4mtYJXux2i+zQB+pC5nmwQ@public.gmane.org
> Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
>  drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
>  drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
>  drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
>  include/drm/bridge/dw_hdmi.h                | 13 ++++++------
>  6 files changed, 60 insertions(+), 36 deletions(-)
> 

[...]
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index e8c3ef8a94ce..d49af17310c9 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,6 +140,7 @@ struct meson_dw_hdmi {
>  	struct clk *venci_clk;
>  	struct regulator *hdmi_supply;
>  	u32 irq_stat;
> +	struct dw_hdmi *hdmi;
>  };
>  #define encoder_to_meson_dw_hdmi(x) \
>  	container_of(x, struct meson_dw_hdmi, encoder)
> @@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
>  	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
>  
> -	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
> -	if (ret)
> -		return ret;
> +	platform_set_drvdata(pdev, meson_dw_hdmi);
> +
> +	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
> +					   &meson_dw_hdmi->dw_plat_data);
> +	if (IS_ERR(meson_dw_hdmi->hdmi))
> +		return PTR_ERR(meson_dw_hdmi->hdmi);
>  
>  	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>  
> @@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
>  				   void *data)
>  {
> -	dw_hdmi_unbind(dev);
> +	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
> +
> +	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
>  }
>  
>  static const struct component_ops meson_dw_hdmi_ops = {

[..]

> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index f3f3f0e1b2d3..dd2a8cf7d20b 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
>  			     unsigned long mpixelclock);
>  };
>  
> -int dw_hdmi_probe(struct platform_device *pdev,
> -		  const struct dw_hdmi_plat_data *plat_data);
> -void dw_hdmi_remove(struct platform_device *pdev);
> -void dw_hdmi_unbind(struct device *dev);
> -int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> -		 const struct dw_hdmi_plat_data *plat_data);
> +struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
> +			      const struct dw_hdmi_plat_data *plat_data);
> +void dw_hdmi_remove(struct dw_hdmi *hdmi);
> +void dw_hdmi_unbind(struct dw_hdmi *hdmi);
> +struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
> +			     struct drm_encoder *encoder,
> +			     const struct dw_hdmi_plat_data *plat_data);
>  
>  void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
>  
> 

For meson-drm and dw-hdmi bridge changes :
Acked-by: Neil Armstrong <narmstrong-rdvid1DuHRBWk0Htik3J/w@public.gmane.org>
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[PATCH v3 05/12] drm/bridge/synopsys: dw-hdmi: don't clobber drvdata

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> dw_hdmi shouldn't set drvdata since some drivers might need to store
> it's own data there. Rework dw_hdmi in a way to return struct dw_hdmi
> instead to store it in drvdata. This way drivers are responsible to
> store and pass structure when needed.
> 
> Idea was taken from the following commit:
> 8242ecbd597d ("drm/bridge/synopsys: stop clobbering drvdata")
> 
> Cc: p.zabel at pengutronix.de
> Cc: narmstrong at baylibre.com
> Cc: Laurent.pinchart at ideasonboard.com
> Cc: hjc at rock-chips.com
> Cc: heiko at sntech.de
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c   | 31 ++++++++++++-----------------
>  drivers/gpu/drm/imx/dw_hdmi-imx.c           | 13 +++++++++---
>  drivers/gpu/drm/meson/meson_dw_hdmi.c       | 14 +++++++++----
>  drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c      | 12 +++++++++--
>  drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 13 +++++++++---
>  include/drm/bridge/dw_hdmi.h                | 13 ++++++------
>  6 files changed, 60 insertions(+), 36 deletions(-)
> 

[...]
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index e8c3ef8a94ce..d49af17310c9 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -140,6 +140,7 @@ struct meson_dw_hdmi {
>  	struct clk *venci_clk;
>  	struct regulator *hdmi_supply;
>  	u32 irq_stat;
> +	struct dw_hdmi *hdmi;
>  };
>  #define encoder_to_meson_dw_hdmi(x) \
>  	container_of(x, struct meson_dw_hdmi, encoder)
> @@ -878,9 +879,12 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  	dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
>  	dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
>  
> -	ret = dw_hdmi_bind(pdev, encoder, &meson_dw_hdmi->dw_plat_data);
> -	if (ret)
> -		return ret;
> +	platform_set_drvdata(pdev, meson_dw_hdmi);
> +
> +	meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
> +					   &meson_dw_hdmi->dw_plat_data);
> +	if (IS_ERR(meson_dw_hdmi->hdmi))
> +		return PTR_ERR(meson_dw_hdmi->hdmi);
>  
>  	DRM_DEBUG_DRIVER("HDMI controller initialized\n");
>  
> @@ -890,7 +894,9 @@ static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
>  static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
>  				   void *data)
>  {
> -	dw_hdmi_unbind(dev);
> +	struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
> +
> +	dw_hdmi_unbind(meson_dw_hdmi->hdmi);
>  }
>  
>  static const struct component_ops meson_dw_hdmi_ops = {

[..]

> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index f3f3f0e1b2d3..dd2a8cf7d20b 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -143,12 +143,13 @@ struct dw_hdmi_plat_data {
>  			     unsigned long mpixelclock);
>  };
>  
> -int dw_hdmi_probe(struct platform_device *pdev,
> -		  const struct dw_hdmi_plat_data *plat_data);
> -void dw_hdmi_remove(struct platform_device *pdev);
> -void dw_hdmi_unbind(struct device *dev);
> -int dw_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
> -		 const struct dw_hdmi_plat_data *plat_data);
> +struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
> +			      const struct dw_hdmi_plat_data *plat_data);
> +void dw_hdmi_remove(struct dw_hdmi *hdmi);
> +void dw_hdmi_unbind(struct dw_hdmi *hdmi);
> +struct dw_hdmi *dw_hdmi_bind(struct platform_device *pdev,
> +			     struct drm_encoder *encoder,
> +			     const struct dw_hdmi_plat_data *plat_data);
>  
>  void dw_hdmi_setup_rx_sense(struct device *dev, bool hpd, bool rx_sense);
>  
> 

For meson-drm and dw-hdmi bridge changes :
Acked-by: Neil Armstrong <narmstrong@baylibre.com>

Re: [PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> Parts of PHY code could be useful also for custom PHYs. For example,
> Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
> with few additional memory mapped registers, so most of the Synopsys PHY
> related code could be reused.
> 
> Functions exported here are actually not specific to Synopsys PHYs but
> to DWC HDMI controller PHY interface. This means that even if the PHY is
> completely custom, i.e. not designed by Synopsys, exported functions can
> be useful.
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
>  drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
>  include/drm/bridge/dw_hdmi.h              | 11 ++++++++
>  3 files changed, 45 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 7ca14d7325b5..7d80f4b56683 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SVSRET_MASK);
>  }
>  
> -static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
>  
> -static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
>  
>  static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
>  {
> @@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SELDIPIF_MASK);
>  }
>  
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
> +{
> +	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> +	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> +	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
> +
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
> +{
> +	hdmi_phy_test_clear(hdmi, 1);
> +	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
> +	hdmi_phy_test_clear(hdmi, 0);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
> +
>  static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
>  {
>  	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
> @@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
>  	if (phy->has_svsret)
>  		dw_hdmi_phy_enable_svsret(hdmi, 1);
>  
> -	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> -	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> -	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +	dw_hdmi_phy_reset(hdmi);
>  
>  	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
>  
> -	hdmi_phy_test_clear(hdmi, 1);
> -	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
> -		    HDMI_PHY_I2CM_SLAVE_ADDR);
> -	hdmi_phy_test_clear(hdmi, 0);
> +	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
>  
>  	/* Write to the PHY as configured by the platform */
>  	if (pdata->configure_phy)
> @@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
>  	dw_hdmi_phy_power_off(hdmi);
>  }
>  
> -static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> -						      void *data)
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data)
>  {
>  	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
>  		connector_status_connected : connector_status_disconnected;
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
>  
> -static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> -				   bool force, bool disabled, bool rxsense)
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense)
>  {
>  	u8 old_mask = hdmi->phy_mask;
>  
> @@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
>  	if (old_mask != hdmi->phy_mask)
>  		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
>  
> -static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  {
>  	/*
>  	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
> @@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
>  		    HDMI_IH_MUTE_PHY_STAT0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
>  
>  static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
>  	.init = dw_hdmi_phy_init,
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 17de3afd98f6..e8c3ef8a94ce 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
>  	}
>  }
>  
> -static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
> +static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
>  {
>  	struct meson_drm *priv = dw_hdmi->priv;
>  
> @@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
>  	msleep(100);
>  
>  	/* Reset PHY 3 times in a row */
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
>  
>  	/* Temporary Disable VENC video stream */
>  	if (priv->venc.hdmi_use_enci)
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 182f83283e24..f3f3f0e1b2d3 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
>  void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
>  
>  /* PHY configuration */
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
>  void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
>  			   unsigned char addr);
>  
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
> +
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data);
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense);
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
> +
>  #endif /* __IMX_HDMI_H__ */
> 

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>

Re: [PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> Parts of PHY code could be useful also for custom PHYs. For example,
> Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
> with few additional memory mapped registers, so most of the Synopsys PHY
> related code could be reused.
> 
> Functions exported here are actually not specific to Synopsys PHYs but
> to DWC HDMI controller PHY interface. This means that even if the PHY is
> completely custom, i.e. not designed by Synopsys, exported functions can
> be useful.
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
>  drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
>  include/drm/bridge/dw_hdmi.h              | 11 ++++++++
>  3 files changed, 45 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 7ca14d7325b5..7d80f4b56683 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SVSRET_MASK);
>  }
>  
> -static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
>  
> -static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
>  
>  static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
>  {
> @@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SELDIPIF_MASK);
>  }
>  
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
> +{
> +	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> +	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> +	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
> +
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
> +{
> +	hdmi_phy_test_clear(hdmi, 1);
> +	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
> +	hdmi_phy_test_clear(hdmi, 0);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
> +
>  static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
>  {
>  	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
> @@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
>  	if (phy->has_svsret)
>  		dw_hdmi_phy_enable_svsret(hdmi, 1);
>  
> -	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> -	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> -	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +	dw_hdmi_phy_reset(hdmi);
>  
>  	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
>  
> -	hdmi_phy_test_clear(hdmi, 1);
> -	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
> -		    HDMI_PHY_I2CM_SLAVE_ADDR);
> -	hdmi_phy_test_clear(hdmi, 0);
> +	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
>  
>  	/* Write to the PHY as configured by the platform */
>  	if (pdata->configure_phy)
> @@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
>  	dw_hdmi_phy_power_off(hdmi);
>  }
>  
> -static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> -						      void *data)
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data)
>  {
>  	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
>  		connector_status_connected : connector_status_disconnected;
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
>  
> -static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> -				   bool force, bool disabled, bool rxsense)
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense)
>  {
>  	u8 old_mask = hdmi->phy_mask;
>  
> @@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
>  	if (old_mask != hdmi->phy_mask)
>  		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
>  
> -static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  {
>  	/*
>  	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
> @@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
>  		    HDMI_IH_MUTE_PHY_STAT0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
>  
>  static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
>  	.init = dw_hdmi_phy_init,
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 17de3afd98f6..e8c3ef8a94ce 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
>  	}
>  }
>  
> -static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
> +static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
>  {
>  	struct meson_drm *priv = dw_hdmi->priv;
>  
> @@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
>  	msleep(100);
>  
>  	/* Reset PHY 3 times in a row */
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
>  
>  	/* Temporary Disable VENC video stream */
>  	if (priv->venc.hdmi_use_enci)
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 182f83283e24..f3f3f0e1b2d3 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
>  void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
>  
>  /* PHY configuration */
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
>  void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
>  			   unsigned char addr);
>  
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
> +
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data);
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense);
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
> +
>  #endif /* __IMX_HDMI_H__ */
> 

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
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[PATCH v3 04/12] drm/bridge/synopsys: dw-hdmi: Export some PHY related functions

[Neil Armstrong]

On 17/01/2018 21:14, Jernej Skrabec wrote:
> Parts of PHY code could be useful also for custom PHYs. For example,
> Allwinner A83T has custom PHY which is probably Synopsys gen2 PHY
> with few additional memory mapped registers, so most of the Synopsys PHY
> related code could be reused.
> 
> Functions exported here are actually not specific to Synopsys PHYs but
> to DWC HDMI controller PHY interface. This means that even if the PHY is
> completely custom, i.e. not designed by Synopsys, exported functions can
> be useful.
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 44 +++++++++++++++++++++----------
>  drivers/gpu/drm/meson/meson_dw_hdmi.c     |  8 +++---
>  include/drm/bridge/dw_hdmi.h              | 11 ++++++++
>  3 files changed, 45 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> index 7ca14d7325b5..7d80f4b56683 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
> @@ -1037,19 +1037,21 @@ static void dw_hdmi_phy_enable_svsret(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SVSRET_MASK);
>  }
>  
> -static void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_PDDQ_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_pddq);
>  
> -static void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable)
>  {
>  	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_OFFSET,
>  			 HDMI_PHY_CONF0_GEN2_TXPWRON_MASK);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_gen2_txpwron);
>  
>  static void dw_hdmi_phy_sel_data_en_pol(struct dw_hdmi *hdmi, u8 enable)
>  {
> @@ -1065,6 +1067,22 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
>  			 HDMI_PHY_CONF0_SELDIPIF_MASK);
>  }
>  
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi)
> +{
> +	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> +	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> +	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_reset);
> +
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address)
> +{
> +	hdmi_phy_test_clear(hdmi, 1);
> +	hdmi_writeb(hdmi, address, HDMI_PHY_I2CM_SLAVE_ADDR);
> +	hdmi_phy_test_clear(hdmi, 0);
> +}
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_i2c_set_addr);
> +
>  static void dw_hdmi_phy_power_off(struct dw_hdmi *hdmi)
>  {
>  	const struct dw_hdmi_phy_data *phy = hdmi->phy.data;
> @@ -1203,16 +1221,11 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi)
>  	if (phy->has_svsret)
>  		dw_hdmi_phy_enable_svsret(hdmi, 1);
>  
> -	/* PHY reset. The reset signal is active high on Gen2 PHYs. */
> -	hdmi_writeb(hdmi, HDMI_MC_PHYRSTZ_PHYRSTZ, HDMI_MC_PHYRSTZ);
> -	hdmi_writeb(hdmi, 0, HDMI_MC_PHYRSTZ);
> +	dw_hdmi_phy_reset(hdmi);
>  
>  	hdmi_writeb(hdmi, HDMI_MC_HEACPHY_RST_ASSERT, HDMI_MC_HEACPHY_RST);
>  
> -	hdmi_phy_test_clear(hdmi, 1);
> -	hdmi_writeb(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2,
> -		    HDMI_PHY_I2CM_SLAVE_ADDR);
> -	hdmi_phy_test_clear(hdmi, 0);
> +	dw_hdmi_phy_i2c_set_addr(hdmi, HDMI_PHY_I2CM_SLAVE_ADDR_PHY_GEN2);
>  
>  	/* Write to the PHY as configured by the platform */
>  	if (pdata->configure_phy)
> @@ -1251,15 +1264,16 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi, void *data)
>  	dw_hdmi_phy_power_off(hdmi);
>  }
>  
> -static enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> -						      void *data)
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data)
>  {
>  	return hdmi_readb(hdmi, HDMI_PHY_STAT0) & HDMI_PHY_HPD ?
>  		connector_status_connected : connector_status_disconnected;
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_read_hpd);
>  
> -static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> -				   bool force, bool disabled, bool rxsense)
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense)
>  {
>  	u8 old_mask = hdmi->phy_mask;
>  
> @@ -1271,8 +1285,9 @@ static void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
>  	if (old_mask != hdmi->phy_mask)
>  		hdmi_writeb(hdmi, hdmi->phy_mask, HDMI_PHY_MASK0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_update_hpd);
>  
> -static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  {
>  	/*
>  	 * Configure the PHY RX SENSE and HPD interrupts polarities and clear
> @@ -1291,6 +1306,7 @@ static void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data)
>  	hdmi_writeb(hdmi, ~(HDMI_IH_PHY_STAT0_HPD | HDMI_IH_PHY_STAT0_RX_SENSE),
>  		    HDMI_IH_MUTE_PHY_STAT0);
>  }
> +EXPORT_SYMBOL_GPL(dw_hdmi_phy_setup_hpd);
>  
>  static const struct dw_hdmi_phy_ops dw_hdmi_synopsys_phy_ops = {
>  	.init = dw_hdmi_phy_init,
> diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> index 17de3afd98f6..e8c3ef8a94ce 100644
> --- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
> +++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
> @@ -302,7 +302,7 @@ static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
>  	}
>  }
>  
> -static inline void dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
> +static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
>  {
>  	struct meson_drm *priv = dw_hdmi->priv;
>  
> @@ -409,9 +409,9 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
>  	msleep(100);
>  
>  	/* Reset PHY 3 times in a row */
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> -	dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
> +	meson_dw_hdmi_phy_reset(dw_hdmi);
>  
>  	/* Temporary Disable VENC video stream */
>  	if (priv->venc.hdmi_use_enci)
> diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
> index 182f83283e24..f3f3f0e1b2d3 100644
> --- a/include/drm/bridge/dw_hdmi.h
> +++ b/include/drm/bridge/dw_hdmi.h
> @@ -157,7 +157,18 @@ void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
>  void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
>  
>  /* PHY configuration */
> +void dw_hdmi_phy_i2c_set_addr(struct dw_hdmi *hdmi, u8 address);
>  void dw_hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
>  			   unsigned char addr);
>  
> +void dw_hdmi_phy_gen2_pddq(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_gen2_txpwron(struct dw_hdmi *hdmi, u8 enable);
> +void dw_hdmi_phy_reset(struct dw_hdmi *hdmi);
> +
> +enum drm_connector_status dw_hdmi_phy_read_hpd(struct dw_hdmi *hdmi,
> +					       void *data);
> +void dw_hdmi_phy_update_hpd(struct dw_hdmi *hdmi, void *data,
> +			    bool force, bool disabled, bool rxsense);
> +void dw_hdmi_phy_setup_hpd(struct dw_hdmi *hdmi, void *data);
> +
>  #endif /* __IMX_HDMI_H__ */
> 

Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>

Re: [PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Škrabec]

Hi,

Dne četrtek, 18. januar 2018 ob 11:58:41 CET je Maxime Ripard napisal(a):
> Hi,
> 
> On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> > This commit changes formula from this:
> > 
> > Freq = (parent_freq * N * K) / (M * P)
> > 
> > to this:
> > 
> > Freq = (parent_freq / M) * N * K / P
> > 
> > This improves situation when N is in the range 1-255. PLL parent clock
> > is almost always 24 MHz, which means that for N >= 180 original formula
> > overflows and result becomes useless. Situation can be improved if M is
> > used as predivider as it can be seen in the second formula. That way at
> > least M > 1 is considered, but it still leaves small gap for wrong result
> > when M = 1 and N >= 180.
> > 
> > Using M as predivider shouldn't cause any issue, because it is in range
> > 1-4 at most, so there is no or only minimal rounding error.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> 
> I'd really prefer to stick to the formula documented and that we've
> used so far. NKMP clocks are most notably used for the CPU PLLs and
> I've debugged way too many cpufreq bugs already :)
> 
> What about using long long types for the parent * n * k result?

Yes, using long long is the best possible solution and covers all cases 
whereas this patch does not.

I thought that do_div() would cause a lot of overhead, but I noticed that it's 
not big if both numbers fit in 32 bit, which in our case is true most of the 
time.

I will make a helper function for calculating rate, since using long long 
needs more than one line of code.

Best regards,
Jernej

Re: [PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Škrabec]

Hi,

Dne =C4=8Detrtek, 18. januar 2018 ob 11:58:41 CET je Maxime Ripard napisal(=
a):
> Hi,
>=20
> On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> > This commit changes formula from this:
> >=20
> > Freq =3D (parent_freq * N * K) / (M * P)
> >=20
> > to this:
> >=20
> > Freq =3D (parent_freq / M) * N * K / P
> >=20
> > This improves situation when N is in the range 1-255. PLL parent clock
> > is almost always 24 MHz, which means that for N >=3D 180 original formu=
la
> > overflows and result becomes useless. Situation can be improved if M is
> > used as predivider as it can be seen in the second formula. That way at
> > least M > 1 is considered, but it still leaves small gap for wrong resu=
lt
> > when M =3D 1 and N >=3D 180.
> >=20
> > Using M as predivider shouldn't cause any issue, because it is in range
> > 1-4 at most, so there is no or only minimal rounding error.
> >=20
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
>=20
> I'd really prefer to stick to the formula documented and that we've
> used so far. NKMP clocks are most notably used for the CPU PLLs and
> I've debugged way too many cpufreq bugs already :)
>=20
> What about using long long types for the parent * n * k result?

Yes, using long long is the best possible solution and covers all cases=20
whereas this patch does not.

I thought that do_div() would cause a lot of overhead, but I noticed that i=
t's=20
not big if both numbers fit in 32 bit, which in our case is true most of th=
e=20
time.

I will make a helper function for calculating rate, since using long long=20
needs more than one line of code.

Best regards,
Jernej

[PATCH v3 02/12] clk: sunxi-ng: Change formula for NKMP PLLs

[Jernej Škrabec]

Hi,

Dne ?etrtek, 18. januar 2018 ob 11:58:41 CET je Maxime Ripard napisal(a):
> Hi,
> 
> On Wed, Jan 17, 2018 at 09:14:11PM +0100, Jernej Skrabec wrote:
> > This commit changes formula from this:
> > 
> > Freq = (parent_freq * N * K) / (M * P)
> > 
> > to this:
> > 
> > Freq = (parent_freq / M) * N * K / P
> > 
> > This improves situation when N is in the range 1-255. PLL parent clock
> > is almost always 24 MHz, which means that for N >= 180 original formula
> > overflows and result becomes useless. Situation can be improved if M is
> > used as predivider as it can be seen in the second formula. That way at
> > least M > 1 is considered, but it still leaves small gap for wrong result
> > when M = 1 and N >= 180.
> > 
> > Using M as predivider shouldn't cause any issue, because it is in range
> > 1-4 at most, so there is no or only minimal rounding error.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> 
> I'd really prefer to stick to the formula documented and that we've
> used so far. NKMP clocks are most notably used for the CPU PLLs and
> I've debugged way too many cpufreq bugs already :)
> 
> What about using long long types for the parent * n * k result?

Yes, using long long is the best possible solution and covers all cases 
whereas this patch does not.

I thought that do_div() would cause a lot of overhead, but I noticed that it's 
not big if both numbers fit in 32 bit, which in our case is true most of the 
time.

I will make a helper function for calculating rate, since using long long 
needs more than one line of code.

Best regards,
Jernej

Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Rob Herring]

On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
> This commit adds all necessary compatibles and descriptions needed to
> implement A83T HDMI pipeline.
> 
> Mixer is already properly described, so only compatible is added.
> 
> However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
> contrary to all TCONs currently described. Because of that, TCON
> documentation is extended.
> 
> A83T features Synopsys DW HDMI controller with a custom PHY which looks
> like Synopsys Gen2 PHY with few additions. Since there is no
> documentation, needed properties were found out through experimentation
> and reading BSP code.
> 
> At the end, example is added for newer SoCs, which feature DE2 and DW
> HDMI.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  .../bindings/display/sunxi/sun4i-drm.txt           | 197 ++++++++++++++++++++-
>  1 file changed, 190 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> index cd626ee1147a..4fb380f3e53d 100644
> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> @@ -64,6 +64,52 @@ Required properties:
>      first port should be the input endpoint. The second should be the
>      output, usually to an HDMI connector.
>  
> +DWC HDMI TX Encoder
> +-------------------
> +
> +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> +with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
> +
> +These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
> +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
> +following device-specific properties.
> +
> +Required properties:
> +
> +  - compatible: value must be one of:
> +    * "allwinner,sun8i-a83t-dw-hdmi"
> +  - reg: base address and size of memory-mapped region
> +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
> +  - interrupts: HDMI interrupt number
> +  - clocks: phandles to the clocks feeding the HDMI encoder
> +    * iahb: the HDMI bus clock
> +    * isfr: the HDMI register clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandle to the reset controller
> +  - reset-names: must be "ctrl"
> +  - phys: phandle to the DWC HDMI PHY
> +  - phy-names: must be "phy"
> +
> +  - ports: A ports node with endpoint definitions as defined in
> +    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> +    first port should be the input endpoint. The second should be the
> +    output, usually to an HDMI connector.
> +
> +DWC HDMI PHY
> +------------
> +
> +Required properties:
> +  - compatible: value must be one of:
> +    * allwinner,sun8i-a83t-hdmi-phy
> +  - reg: base address and size of memory-mapped region
> +  - clocks: phandles to the clocks feeding the HDMI PHY
> +    * bus: the HDMI PHY interface clock
> +    * mod: the HDMI PHY module clock
> +    * tmds: TMDS clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandle to the reset controller driving the PHY
> +  - reset-names: must be "phy"
> +
>  TV Encoder
>  ----------
>  
> @@ -94,24 +140,23 @@ Required properties:
>     * allwinner,sun7i-a20-tcon
>     * allwinner,sun8i-a33-tcon
>     * allwinner,sun8i-a83t-tcon-lcd
> +   * allwinner,sun8i-a83t-tcon-tv
>     * allwinner,sun8i-v3s-tcon
>   - reg: base address and size of memory-mapped region
>   - interrupts: interrupt associated to this IP
> - - clocks: phandles to the clocks feeding the TCON. Three are needed:
> + - clocks: phandles to the clocks feeding the TCON. One is needed:
>     - 'ahb': the interface clocks
> -   - 'tcon-ch0': The clock driving the TCON channel 0

Well, it didn't look right before saying 3 are needed, but listing 2. 
However, you can't just change this as it affects all the other SoCs. 
This should probably be a separate patch.

>   - resets: phandles to the reset controllers driving the encoder
>     - "lcd": the reset line for the TCON channel 0
>  
>   - clock-names: the clock names mentioned above
>   - reset-names: the reset names mentioned above
> - - clock-output-names: Name of the pixel clock created

Why is this removed?

>  
>  - ports: A ports node with endpoint definitions as defined in
>    Documentation/devicetree/bindings/media/video-interfaces.txt. The
>    first port should be the input endpoint, the second one the output
>  
> -  The output may have multiple endpoints. The TCON has two channels,
> +  The output may have multiple endpoints. TCON can have two channels,

Perhaps you should say "can have 1 or 2 channels".

>    usually with the first channel being used for the panels interfaces
>    (RGB, LVDS, etc.), and the second being used for the outputs that
>    require another controller (TV Encoder, HDMI, etc.). The endpoints
> @@ -119,11 +164,16 @@ Required properties:
>    channel the endpoint is associated to. If that property is not
>    present, the endpoint number will be used as the channel number.
>  
> +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
> +more clocks are needed:
> +   - 'tcon-ch0': The clock driving the TCON channel 0

Looks like one clock to me.

> +   - clock-output-names: Name of the pixel clock created

It's better to not move this, but just add what compatibles it does or 
doesn't apply to.

> +
>  On SoCs other than the A33 and V3s, there is one more clock required:
>     - 'tcon-ch1': The clock driving the TCON channel 1
>  
> -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
> -need one more reset line:
> +When TCON support LVDS (all TCONs except TV TCON on A83T and those found
> +in A13, H3, H5 and V3s SoCs), you need one more reset line:
>     - 'lvds': The reset line driving the LVDS logic
>  
>  And on the A23, A31, A31s and A33, you need one more clock line:
> @@ -226,6 +276,7 @@ supported.
>  Required properties:
>    - compatible: value must be one of:
>      * allwinner,sun8i-a83t-de2-mixer-0
> +    * allwinner,sun8i-a83t-de2-mixer-1
>      * allwinner,sun8i-v3s-de2-mixer
>    - reg: base address and size of the memory-mapped region.
>    - clocks: phandles to the clocks feeding the mixer
> @@ -261,7 +312,7 @@ Required properties:
>    - allwinner,pipelines: list of phandle to the display engine
>      frontends (DE 1.0) or mixers (DE 2.0) available.
>  
> -Example:
> +Example 1:
>  
>  panel: panel {
>  	compatible = "olimex,lcd-olinuxino-43-ts";
> @@ -460,3 +511,135 @@ display-engine {
>  	compatible = "allwinner,sun5i-a13-display-engine";
>  	allwinner,pipelines = <&fe0>;
>  };
> +
> +Example 2:

Is this really different enough to need an example? Examples don't 
need to enumerate all possible options. They are often wrong because 
they don't compile on their own and that creates a maintenance burden.

Rob

[PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Rob Herring]

On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
> This commit adds all necessary compatibles and descriptions needed to
> implement A83T HDMI pipeline.
> 
> Mixer is already properly described, so only compatible is added.
> 
> However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
> contrary to all TCONs currently described. Because of that, TCON
> documentation is extended.
> 
> A83T features Synopsys DW HDMI controller with a custom PHY which looks
> like Synopsys Gen2 PHY with few additions. Since there is no
> documentation, needed properties were found out through experimentation
> and reading BSP code.
> 
> At the end, example is added for newer SoCs, which feature DE2 and DW
> HDMI.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> ---
>  .../bindings/display/sunxi/sun4i-drm.txt           | 197 ++++++++++++++++++++-
>  1 file changed, 190 insertions(+), 7 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> index cd626ee1147a..4fb380f3e53d 100644
> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> @@ -64,6 +64,52 @@ Required properties:
>      first port should be the input endpoint. The second should be the
>      output, usually to an HDMI connector.
>  
> +DWC HDMI TX Encoder
> +-------------------
> +
> +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> +with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
> +
> +These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
> +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
> +following device-specific properties.
> +
> +Required properties:
> +
> +  - compatible: value must be one of:
> +    * "allwinner,sun8i-a83t-dw-hdmi"
> +  - reg: base address and size of memory-mapped region
> +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
> +  - interrupts: HDMI interrupt number
> +  - clocks: phandles to the clocks feeding the HDMI encoder
> +    * iahb: the HDMI bus clock
> +    * isfr: the HDMI register clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandle to the reset controller
> +  - reset-names: must be "ctrl"
> +  - phys: phandle to the DWC HDMI PHY
> +  - phy-names: must be "phy"
> +
> +  - ports: A ports node with endpoint definitions as defined in
> +    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> +    first port should be the input endpoint. The second should be the
> +    output, usually to an HDMI connector.
> +
> +DWC HDMI PHY
> +------------
> +
> +Required properties:
> +  - compatible: value must be one of:
> +    * allwinner,sun8i-a83t-hdmi-phy
> +  - reg: base address and size of memory-mapped region
> +  - clocks: phandles to the clocks feeding the HDMI PHY
> +    * bus: the HDMI PHY interface clock
> +    * mod: the HDMI PHY module clock
> +    * tmds: TMDS clock
> +  - clock-names: the clock names mentioned above
> +  - resets: phandle to the reset controller driving the PHY
> +  - reset-names: must be "phy"
> +
>  TV Encoder
>  ----------
>  
> @@ -94,24 +140,23 @@ Required properties:
>     * allwinner,sun7i-a20-tcon
>     * allwinner,sun8i-a33-tcon
>     * allwinner,sun8i-a83t-tcon-lcd
> +   * allwinner,sun8i-a83t-tcon-tv
>     * allwinner,sun8i-v3s-tcon
>   - reg: base address and size of memory-mapped region
>   - interrupts: interrupt associated to this IP
> - - clocks: phandles to the clocks feeding the TCON. Three are needed:
> + - clocks: phandles to the clocks feeding the TCON. One is needed:
>     - 'ahb': the interface clocks
> -   - 'tcon-ch0': The clock driving the TCON channel 0

Well, it didn't look right before saying 3 are needed, but listing 2. 
However, you can't just change this as it affects all the other SoCs. 
This should probably be a separate patch.

>   - resets: phandles to the reset controllers driving the encoder
>     - "lcd": the reset line for the TCON channel 0
>  
>   - clock-names: the clock names mentioned above
>   - reset-names: the reset names mentioned above
> - - clock-output-names: Name of the pixel clock created

Why is this removed?

>  
>  - ports: A ports node with endpoint definitions as defined in
>    Documentation/devicetree/bindings/media/video-interfaces.txt. The
>    first port should be the input endpoint, the second one the output
>  
> -  The output may have multiple endpoints. The TCON has two channels,
> +  The output may have multiple endpoints. TCON can have two channels,

Perhaps you should say "can have 1 or 2 channels".

>    usually with the first channel being used for the panels interfaces
>    (RGB, LVDS, etc.), and the second being used for the outputs that
>    require another controller (TV Encoder, HDMI, etc.). The endpoints
> @@ -119,11 +164,16 @@ Required properties:
>    channel the endpoint is associated to. If that property is not
>    present, the endpoint number will be used as the channel number.
>  
> +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
> +more clocks are needed:
> +   - 'tcon-ch0': The clock driving the TCON channel 0

Looks like one clock to me.

> +   - clock-output-names: Name of the pixel clock created

It's better to not move this, but just add what compatibles it does or 
doesn't apply to.

> +
>  On SoCs other than the A33 and V3s, there is one more clock required:
>     - 'tcon-ch1': The clock driving the TCON channel 1
>  
> -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
> -need one more reset line:
> +When TCON support LVDS (all TCONs except TV TCON on A83T and those found
> +in A13, H3, H5 and V3s SoCs), you need one more reset line:
>     - 'lvds': The reset line driving the LVDS logic
>  
>  And on the A23, A31, A31s and A33, you need one more clock line:
> @@ -226,6 +276,7 @@ supported.
>  Required properties:
>    - compatible: value must be one of:
>      * allwinner,sun8i-a83t-de2-mixer-0
> +    * allwinner,sun8i-a83t-de2-mixer-1
>      * allwinner,sun8i-v3s-de2-mixer
>    - reg: base address and size of the memory-mapped region.
>    - clocks: phandles to the clocks feeding the mixer
> @@ -261,7 +312,7 @@ Required properties:
>    - allwinner,pipelines: list of phandle to the display engine
>      frontends (DE 1.0) or mixers (DE 2.0) available.
>  
> -Example:
> +Example 1:
>  
>  panel: panel {
>  	compatible = "olimex,lcd-olinuxino-43-ts";
> @@ -460,3 +511,135 @@ display-engine {
>  	compatible = "allwinner,sun5i-a13-display-engine";
>  	allwinner,pipelines = <&fe0>;
>  };
> +
> +Example 2:

Is this really different enough to need an example? Examples don't 
need to enumerate all possible options. They are often wrong because 
they don't compile on their own and that creates a maintenance burden.

Rob

Re: [linux-sunxi] Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Icenowy Zheng]

于 2018年1月30日 GMT+08:00 上午2:05:26, Rob Herring <robh@kernel.org> 写到:
>On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
>> This commit adds all necessary compatibles and descriptions needed to
>> implement A83T HDMI pipeline.
>> 
>> Mixer is already properly described, so only compatible is added.
>> 
>> However, A83T TV TCON, which is connected to HDMI, doesn't have
>channel 0,
>> contrary to all TCONs currently described. Because of that, TCON
>> documentation is extended.
>> 
>> A83T features Synopsys DW HDMI controller with a custom PHY which
>looks
>> like Synopsys Gen2 PHY with few additions. Since there is no
>> documentation, needed properties were found out through
>experimentation
>> and reading BSP code.
>> 
>> At the end, example is added for newer SoCs, which feature DE2 and DW
>> HDMI.
>> 
>> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
>> ---
>>  .../bindings/display/sunxi/sun4i-drm.txt           | 197
>++++++++++++++++++++-
>>  1 file changed, 190 insertions(+), 7 deletions(-)
>> 
>> diff --git
>a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> index cd626ee1147a..4fb380f3e53d 100644
>> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> @@ -64,6 +64,52 @@ Required properties:
>>      first port should be the input endpoint. The second should be
>the
>>      output, usually to an HDMI connector.
>>  
>> +DWC HDMI TX Encoder
>> +-------------------
>> +
>> +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller
>IP
>> +with Allwinner's own PHY IP. It supports audio and video outputs and
>CEC.
>> +
>> +These DT bindings follow the Synopsys DWC HDMI TX bindings defined
>in
>> +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with
>the
>> +following device-specific properties.
>> +
>> +Required properties:
>> +
>> +  - compatible: value must be one of:
>> +    * "allwinner,sun8i-a83t-dw-hdmi"
>> +  - reg: base address and size of memory-mapped region
>> +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
>> +  - interrupts: HDMI interrupt number
>> +  - clocks: phandles to the clocks feeding the HDMI encoder
>> +    * iahb: the HDMI bus clock
>> +    * isfr: the HDMI register clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller
>> +  - reset-names: must be "ctrl"
>> +  - phys: phandle to the DWC HDMI PHY
>> +  - phy-names: must be "phy"
>> +
>> +  - ports: A ports node with endpoint definitions as defined in
>> +    Documentation/devicetree/bindings/media/video-interfaces.txt.
>The
>> +    first port should be the input endpoint. The second should be
>the
>> +    output, usually to an HDMI connector.
>> +
>> +DWC HDMI PHY
>> +------------
>> +
>> +Required properties:
>> +  - compatible: value must be one of:
>> +    * allwinner,sun8i-a83t-hdmi-phy
>> +  - reg: base address and size of memory-mapped region
>> +  - clocks: phandles to the clocks feeding the HDMI PHY
>> +    * bus: the HDMI PHY interface clock
>> +    * mod: the HDMI PHY module clock
>> +    * tmds: TMDS clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller driving the PHY
>> +  - reset-names: must be "phy"
>> +
>>  TV Encoder
>>  ----------
>>  
>> @@ -94,24 +140,23 @@ Required properties:
>>     * allwinner,sun7i-a20-tcon
>>     * allwinner,sun8i-a33-tcon
>>     * allwinner,sun8i-a83t-tcon-lcd
>> +   * allwinner,sun8i-a83t-tcon-tv
>>     * allwinner,sun8i-v3s-tcon
>>   - reg: base address and size of memory-mapped region
>>   - interrupts: interrupt associated to this IP
>> - - clocks: phandles to the clocks feeding the TCON. Three are
>needed:
>> + - clocks: phandles to the clocks feeding the TCON. One is needed:
>>     - 'ahb': the interface clocks
>> -   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Well, it didn't look right before saying 3 are needed, but listing 2. 
>However, you can't just change this as it affects all the other SoCs. 
>This should probably be a separate patch.
>
>>   - resets: phandles to the reset controllers driving the encoder
>>     - "lcd": the reset line for the TCON channel 0
>>  
>>   - clock-names: the clock names mentioned above
>>   - reset-names: the reset names mentioned above
>> - - clock-output-names: Name of the pixel clock created
>
>Why is this removed?
>
>>  
>>  - ports: A ports node with endpoint definitions as defined in
>>    Documentation/devicetree/bindings/media/video-interfaces.txt. The
>>    first port should be the input endpoint, the second one the output
>>  
>> -  The output may have multiple endpoints. The TCON has two channels,
>> +  The output may have multiple endpoints. TCON can have two
>channels,
>
>Perhaps you should say "can have 1 or 2 channels".
>
>>    usually with the first channel being used for the panels
>interfaces
>>    (RGB, LVDS, etc.), and the second being used for the outputs that
>>    require another controller (TV Encoder, HDMI, etc.). The endpoints
>> @@ -119,11 +164,16 @@ Required properties:
>>    channel the endpoint is associated to. If that property is not
>>    present, the endpoint number will be used as the channel number.
>>  
>> +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
>> +more clocks are needed:
>> +   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Looks like one clock to me.

He should mean one input and one output.

>
>> +   - clock-output-names: Name of the pixel clock created
>
>It's better to not move this, but just add what compatibles it does or 
>doesn't apply to.

The existence of pclk out is tied with ch0 input, as ch0 input
is the parent of pclk output.

>
>> +
>>  On SoCs other than the A33 and V3s, there is one more clock
>required:
>>     - 'tcon-ch1': The clock driving the TCON channel 1
>>  
>> -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s),
>you
>> -need one more reset line:
>> +When TCON support LVDS (all TCONs except TV TCON on A83T and those
>found
>> +in A13, H3, H5 and V3s SoCs), you need one more reset line:
>>     - 'lvds': The reset line driving the LVDS logic
>>  
>>  And on the A23, A31, A31s and A33, you need one more clock line:
>> @@ -226,6 +276,7 @@ supported.
>>  Required properties:
>>    - compatible: value must be one of:
>>      * allwinner,sun8i-a83t-de2-mixer-0
>> +    * allwinner,sun8i-a83t-de2-mixer-1
>>      * allwinner,sun8i-v3s-de2-mixer
>>    - reg: base address and size of the memory-mapped region.
>>    - clocks: phandles to the clocks feeding the mixer
>> @@ -261,7 +312,7 @@ Required properties:
>>    - allwinner,pipelines: list of phandle to the display engine
>>      frontends (DE 1.0) or mixers (DE 2.0) available.
>>  
>> -Example:
>> +Example 1:
>>  
>>  panel: panel {
>>  	compatible = "olimex,lcd-olinuxino-43-ts";
>> @@ -460,3 +511,135 @@ display-engine {
>>  	compatible = "allwinner,sun5i-a13-display-engine";
>>  	allwinner,pipelines = <&fe0>;
>>  };
>> +
>> +Example 2:
>
>Is this really different enough to need an example? Examples don't 
>need to enumerate all possible options. They are often wrong because 
>they don't compile on their own and that creates a maintenance burden.
>
>Rob

Re: [linux-sunxi] Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Icenowy Zheng]

于 2018年1月30日 GMT+08:00 上午2:05:26, Rob Herring <robh@kernel.org> 写到:
>On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
>> This commit adds all necessary compatibles and descriptions needed to
>> implement A83T HDMI pipeline.
>> 
>> Mixer is already properly described, so only compatible is added.
>> 
>> However, A83T TV TCON, which is connected to HDMI, doesn't have
>channel 0,
>> contrary to all TCONs currently described. Because of that, TCON
>> documentation is extended.
>> 
>> A83T features Synopsys DW HDMI controller with a custom PHY which
>looks
>> like Synopsys Gen2 PHY with few additions. Since there is no
>> documentation, needed properties were found out through
>experimentation
>> and reading BSP code.
>> 
>> At the end, example is added for newer SoCs, which feature DE2 and DW
>> HDMI.
>> 
>> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
>> ---
>>  .../bindings/display/sunxi/sun4i-drm.txt           | 197
>++++++++++++++++++++-
>>  1 file changed, 190 insertions(+), 7 deletions(-)
>> 
>> diff --git
>a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> index cd626ee1147a..4fb380f3e53d 100644
>> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> @@ -64,6 +64,52 @@ Required properties:
>>      first port should be the input endpoint. The second should be
>the
>>      output, usually to an HDMI connector.
>>  
>> +DWC HDMI TX Encoder
>> +-------------------
>> +
>> +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller
>IP
>> +with Allwinner's own PHY IP. It supports audio and video outputs and
>CEC.
>> +
>> +These DT bindings follow the Synopsys DWC HDMI TX bindings defined
>in
>> +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with
>the
>> +following device-specific properties.
>> +
>> +Required properties:
>> +
>> +  - compatible: value must be one of:
>> +    * "allwinner,sun8i-a83t-dw-hdmi"
>> +  - reg: base address and size of memory-mapped region
>> +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
>> +  - interrupts: HDMI interrupt number
>> +  - clocks: phandles to the clocks feeding the HDMI encoder
>> +    * iahb: the HDMI bus clock
>> +    * isfr: the HDMI register clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller
>> +  - reset-names: must be "ctrl"
>> +  - phys: phandle to the DWC HDMI PHY
>> +  - phy-names: must be "phy"
>> +
>> +  - ports: A ports node with endpoint definitions as defined in
>> +    Documentation/devicetree/bindings/media/video-interfaces.txt.
>The
>> +    first port should be the input endpoint. The second should be
>the
>> +    output, usually to an HDMI connector.
>> +
>> +DWC HDMI PHY
>> +------------
>> +
>> +Required properties:
>> +  - compatible: value must be one of:
>> +    * allwinner,sun8i-a83t-hdmi-phy
>> +  - reg: base address and size of memory-mapped region
>> +  - clocks: phandles to the clocks feeding the HDMI PHY
>> +    * bus: the HDMI PHY interface clock
>> +    * mod: the HDMI PHY module clock
>> +    * tmds: TMDS clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller driving the PHY
>> +  - reset-names: must be "phy"
>> +
>>  TV Encoder
>>  ----------
>>  
>> @@ -94,24 +140,23 @@ Required properties:
>>     * allwinner,sun7i-a20-tcon
>>     * allwinner,sun8i-a33-tcon
>>     * allwinner,sun8i-a83t-tcon-lcd
>> +   * allwinner,sun8i-a83t-tcon-tv
>>     * allwinner,sun8i-v3s-tcon
>>   - reg: base address and size of memory-mapped region
>>   - interrupts: interrupt associated to this IP
>> - - clocks: phandles to the clocks feeding the TCON. Three are
>needed:
>> + - clocks: phandles to the clocks feeding the TCON. One is needed:
>>     - 'ahb': the interface clocks
>> -   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Well, it didn't look right before saying 3 are needed, but listing 2. 
>However, you can't just change this as it affects all the other SoCs. 
>This should probably be a separate patch.
>
>>   - resets: phandles to the reset controllers driving the encoder
>>     - "lcd": the reset line for the TCON channel 0
>>  
>>   - clock-names: the clock names mentioned above
>>   - reset-names: the reset names mentioned above
>> - - clock-output-names: Name of the pixel clock created
>
>Why is this removed?
>
>>  
>>  - ports: A ports node with endpoint definitions as defined in
>>    Documentation/devicetree/bindings/media/video-interfaces.txt. The
>>    first port should be the input endpoint, the second one the output
>>  
>> -  The output may have multiple endpoints. The TCON has two channels,
>> +  The output may have multiple endpoints. TCON can have two
>channels,
>
>Perhaps you should say "can have 1 or 2 channels".
>
>>    usually with the first channel being used for the panels
>interfaces
>>    (RGB, LVDS, etc.), and the second being used for the outputs that
>>    require another controller (TV Encoder, HDMI, etc.). The endpoints
>> @@ -119,11 +164,16 @@ Required properties:
>>    channel the endpoint is associated to. If that property is not
>>    present, the endpoint number will be used as the channel number.
>>  
>> +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
>> +more clocks are needed:
>> +   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Looks like one clock to me.

He should mean one input and one output.

>
>> +   - clock-output-names: Name of the pixel clock created
>
>It's better to not move this, but just add what compatibles it does or 
>doesn't apply to.

The existence of pclk out is tied with ch0 input, as ch0 input
is the parent of pclk output.

>
>> +
>>  On SoCs other than the A33 and V3s, there is one more clock
>required:
>>     - 'tcon-ch1': The clock driving the TCON channel 1
>>  
>> -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s),
>you
>> -need one more reset line:
>> +When TCON support LVDS (all TCONs except TV TCON on A83T and those
>found
>> +in A13, H3, H5 and V3s SoCs), you need one more reset line:
>>     - 'lvds': The reset line driving the LVDS logic
>>  
>>  And on the A23, A31, A31s and A33, you need one more clock line:
>> @@ -226,6 +276,7 @@ supported.
>>  Required properties:
>>    - compatible: value must be one of:
>>      * allwinner,sun8i-a83t-de2-mixer-0
>> +    * allwinner,sun8i-a83t-de2-mixer-1
>>      * allwinner,sun8i-v3s-de2-mixer
>>    - reg: base address and size of the memory-mapped region.
>>    - clocks: phandles to the clocks feeding the mixer
>> @@ -261,7 +312,7 @@ Required properties:
>>    - allwinner,pipelines: list of phandle to the display engine
>>      frontends (DE 1.0) or mixers (DE 2.0) available.
>>  
>> -Example:
>> +Example 1:
>>  
>>  panel: panel {
>>  	compatible = "olimex,lcd-olinuxino-43-ts";
>> @@ -460,3 +511,135 @@ display-engine {
>>  	compatible = "allwinner,sun5i-a13-display-engine";
>>  	allwinner,pipelines = <&fe0>;
>>  };
>> +
>> +Example 2:
>
>Is this really different enough to need an example? Examples don't 
>need to enumerate all possible options. They are often wrong because 
>they don't compile on their own and that creates a maintenance burden.
>
>Rob

[linux-sunxi] Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Icenowy Zheng]

? 2018?1?30? GMT+08:00 ??2:05:26, Rob Herring <robh@kernel.org> ??:
>On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
>> This commit adds all necessary compatibles and descriptions needed to
>> implement A83T HDMI pipeline.
>> 
>> Mixer is already properly described, so only compatible is added.
>> 
>> However, A83T TV TCON, which is connected to HDMI, doesn't have
>channel 0,
>> contrary to all TCONs currently described. Because of that, TCON
>> documentation is extended.
>> 
>> A83T features Synopsys DW HDMI controller with a custom PHY which
>looks
>> like Synopsys Gen2 PHY with few additions. Since there is no
>> documentation, needed properties were found out through
>experimentation
>> and reading BSP code.
>> 
>> At the end, example is added for newer SoCs, which feature DE2 and DW
>> HDMI.
>> 
>> Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
>> ---
>>  .../bindings/display/sunxi/sun4i-drm.txt           | 197
>++++++++++++++++++++-
>>  1 file changed, 190 insertions(+), 7 deletions(-)
>> 
>> diff --git
>a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> index cd626ee1147a..4fb380f3e53d 100644
>> --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
>> @@ -64,6 +64,52 @@ Required properties:
>>      first port should be the input endpoint. The second should be
>the
>>      output, usually to an HDMI connector.
>>  
>> +DWC HDMI TX Encoder
>> +-------------------
>> +
>> +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller
>IP
>> +with Allwinner's own PHY IP. It supports audio and video outputs and
>CEC.
>> +
>> +These DT bindings follow the Synopsys DWC HDMI TX bindings defined
>in
>> +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with
>the
>> +following device-specific properties.
>> +
>> +Required properties:
>> +
>> +  - compatible: value must be one of:
>> +    * "allwinner,sun8i-a83t-dw-hdmi"
>> +  - reg: base address and size of memory-mapped region
>> +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
>> +  - interrupts: HDMI interrupt number
>> +  - clocks: phandles to the clocks feeding the HDMI encoder
>> +    * iahb: the HDMI bus clock
>> +    * isfr: the HDMI register clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller
>> +  - reset-names: must be "ctrl"
>> +  - phys: phandle to the DWC HDMI PHY
>> +  - phy-names: must be "phy"
>> +
>> +  - ports: A ports node with endpoint definitions as defined in
>> +    Documentation/devicetree/bindings/media/video-interfaces.txt.
>The
>> +    first port should be the input endpoint. The second should be
>the
>> +    output, usually to an HDMI connector.
>> +
>> +DWC HDMI PHY
>> +------------
>> +
>> +Required properties:
>> +  - compatible: value must be one of:
>> +    * allwinner,sun8i-a83t-hdmi-phy
>> +  - reg: base address and size of memory-mapped region
>> +  - clocks: phandles to the clocks feeding the HDMI PHY
>> +    * bus: the HDMI PHY interface clock
>> +    * mod: the HDMI PHY module clock
>> +    * tmds: TMDS clock
>> +  - clock-names: the clock names mentioned above
>> +  - resets: phandle to the reset controller driving the PHY
>> +  - reset-names: must be "phy"
>> +
>>  TV Encoder
>>  ----------
>>  
>> @@ -94,24 +140,23 @@ Required properties:
>>     * allwinner,sun7i-a20-tcon
>>     * allwinner,sun8i-a33-tcon
>>     * allwinner,sun8i-a83t-tcon-lcd
>> +   * allwinner,sun8i-a83t-tcon-tv
>>     * allwinner,sun8i-v3s-tcon
>>   - reg: base address and size of memory-mapped region
>>   - interrupts: interrupt associated to this IP
>> - - clocks: phandles to the clocks feeding the TCON. Three are
>needed:
>> + - clocks: phandles to the clocks feeding the TCON. One is needed:
>>     - 'ahb': the interface clocks
>> -   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Well, it didn't look right before saying 3 are needed, but listing 2. 
>However, you can't just change this as it affects all the other SoCs. 
>This should probably be a separate patch.
>
>>   - resets: phandles to the reset controllers driving the encoder
>>     - "lcd": the reset line for the TCON channel 0
>>  
>>   - clock-names: the clock names mentioned above
>>   - reset-names: the reset names mentioned above
>> - - clock-output-names: Name of the pixel clock created
>
>Why is this removed?
>
>>  
>>  - ports: A ports node with endpoint definitions as defined in
>>    Documentation/devicetree/bindings/media/video-interfaces.txt. The
>>    first port should be the input endpoint, the second one the output
>>  
>> -  The output may have multiple endpoints. The TCON has two channels,
>> +  The output may have multiple endpoints. TCON can have two
>channels,
>
>Perhaps you should say "can have 1 or 2 channels".
>
>>    usually with the first channel being used for the panels
>interfaces
>>    (RGB, LVDS, etc.), and the second being used for the outputs that
>>    require another controller (TV Encoder, HDMI, etc.). The endpoints
>> @@ -119,11 +164,16 @@ Required properties:
>>    channel the endpoint is associated to. If that property is not
>>    present, the endpoint number will be used as the channel number.
>>  
>> +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
>> +more clocks are needed:
>> +   - 'tcon-ch0': The clock driving the TCON channel 0
>
>Looks like one clock to me.

He should mean one input and one output.

>
>> +   - clock-output-names: Name of the pixel clock created
>
>It's better to not move this, but just add what compatibles it does or 
>doesn't apply to.

The existence of pclk out is tied with ch0 input, as ch0 input
is the parent of pclk output.

>
>> +
>>  On SoCs other than the A33 and V3s, there is one more clock
>required:
>>     - 'tcon-ch1': The clock driving the TCON channel 1
>>  
>> -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s),
>you
>> -need one more reset line:
>> +When TCON support LVDS (all TCONs except TV TCON on A83T and those
>found
>> +in A13, H3, H5 and V3s SoCs), you need one more reset line:
>>     - 'lvds': The reset line driving the LVDS logic
>>  
>>  And on the A23, A31, A31s and A33, you need one more clock line:
>> @@ -226,6 +276,7 @@ supported.
>>  Required properties:
>>    - compatible: value must be one of:
>>      * allwinner,sun8i-a83t-de2-mixer-0
>> +    * allwinner,sun8i-a83t-de2-mixer-1
>>      * allwinner,sun8i-v3s-de2-mixer
>>    - reg: base address and size of the memory-mapped region.
>>    - clocks: phandles to the clocks feeding the mixer
>> @@ -261,7 +312,7 @@ Required properties:
>>    - allwinner,pipelines: list of phandle to the display engine
>>      frontends (DE 1.0) or mixers (DE 2.0) available.
>>  
>> -Example:
>> +Example 1:
>>  
>>  panel: panel {
>>  	compatible = "olimex,lcd-olinuxino-43-ts";
>> @@ -460,3 +511,135 @@ display-engine {
>>  	compatible = "allwinner,sun5i-a13-display-engine";
>>  	allwinner,pipelines = <&fe0>;
>>  };
>> +
>> +Example 2:
>
>Is this really different enough to need an example? Examples don't 
>need to enumerate all possible options. They are often wrong because 
>they don't compile on their own and that creates a maintenance burden.
>
>Rob

Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Škrabec]

Hi,

Dne ponedeljek, 29. januar 2018 ob 19:05:26 CET je Rob Herring napisal(a):
> On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
> > This commit adds all necessary compatibles and descriptions needed to
> > implement A83T HDMI pipeline.
> > 
> > Mixer is already properly described, so only compatible is added.
> > 
> > However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
> > contrary to all TCONs currently described. Because of that, TCON
> > documentation is extended.
> > 
> > A83T features Synopsys DW HDMI controller with a custom PHY which looks
> > like Synopsys Gen2 PHY with few additions. Since there is no
> > documentation, needed properties were found out through experimentation
> > and reading BSP code.
> > 
> > At the end, example is added for newer SoCs, which feature DE2 and DW
> > HDMI.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> > ---
> > 
> >  .../bindings/display/sunxi/sun4i-drm.txt           | 197
> >  ++++++++++++++++++++- 1 file changed, 190 insertions(+), 7 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt index
> > cd626ee1147a..4fb380f3e53d 100644
> > --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > 
> > @@ -64,6 +64,52 @@ Required properties:
> >      first port should be the input endpoint. The second should be the
> >      output, usually to an HDMI connector.
> > 
> > +DWC HDMI TX Encoder
> > +-------------------
> > +
> > +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> > +with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
> > +
> > +These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
> > +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
> > +following device-specific properties.
> > +
> > +Required properties:
> > +
> > +  - compatible: value must be one of:
> > +    * "allwinner,sun8i-a83t-dw-hdmi"
> > +  - reg: base address and size of memory-mapped region
> > +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
> > +  - interrupts: HDMI interrupt number
> > +  - clocks: phandles to the clocks feeding the HDMI encoder
> > +    * iahb: the HDMI bus clock
> > +    * isfr: the HDMI register clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller
> > +  - reset-names: must be "ctrl"
> > +  - phys: phandle to the DWC HDMI PHY
> > +  - phy-names: must be "phy"
> > +
> > +  - ports: A ports node with endpoint definitions as defined in
> > +    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> > +    first port should be the input endpoint. The second should be the
> > +    output, usually to an HDMI connector.
> > +
> > +DWC HDMI PHY
> > +------------
> > +
> > +Required properties:
> > +  - compatible: value must be one of:
> > +    * allwinner,sun8i-a83t-hdmi-phy
> > +  - reg: base address and size of memory-mapped region
> > +  - clocks: phandles to the clocks feeding the HDMI PHY
> > +    * bus: the HDMI PHY interface clock
> > +    * mod: the HDMI PHY module clock
> > +    * tmds: TMDS clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller driving the PHY
> > +  - reset-names: must be "phy"
> > +
> > 
> >  TV Encoder
> >  ----------
> > 
> > @@ -94,24 +140,23 @@ Required properties:
> >     * allwinner,sun7i-a20-tcon
> >     * allwinner,sun8i-a33-tcon
> >     * allwinner,sun8i-a83t-tcon-lcd
> > 
> > +   * allwinner,sun8i-a83t-tcon-tv
> > 
> >     * allwinner,sun8i-v3s-tcon
> >   
> >   - reg: base address and size of memory-mapped region
> >   - interrupts: interrupt associated to this IP
> > 
> > - - clocks: phandles to the clocks feeding the TCON. Three are needed:
> > 
> > + - clocks: phandles to the clocks feeding the TCON. One is needed:
> >     - 'ahb': the interface clocks
> > 
> > -   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Well, it didn't look right before saying 3 are needed, but listing 2.
> However, you can't just change this as it affects all the other SoCs.
> This should probably be a separate patch.

I had a feeling that all items which are not common to all compatibles should 
be listed below and explained when they are needed. At least currently it's 
done this way.

> 
> >   - resets: phandles to the reset controllers driving the encoder
> >   
> >     - "lcd": the reset line for the TCON channel 0
> >   
> >   - clock-names: the clock names mentioned above
> >   - reset-names: the reset names mentioned above
> > 
> > - - clock-output-names: Name of the pixel clock created
> 
> Why is this removed?
> 
> >  - ports: A ports node with endpoint definitions as defined in
> >  
> >    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> >    first port should be the input endpoint, the second one the output
> > 
> > -  The output may have multiple endpoints. The TCON has two channels,
> > +  The output may have multiple endpoints. TCON can have two channels,
> 
> Perhaps you should say "can have 1 or 2 channels".

Ok.

> 
> >    usually with the first channel being used for the panels interfaces
> >    (RGB, LVDS, etc.), and the second being used for the outputs that
> >    require another controller (TV Encoder, HDMI, etc.). The endpoints
> > 
> > @@ -119,11 +164,16 @@ Required properties:
> >    channel the endpoint is associated to. If that property is not
> >    present, the endpoint number will be used as the channel number.
> > 
> > +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
> > +more clocks are needed:
> > +   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Looks like one clock to me.
> 
> > +   - clock-output-names: Name of the pixel clock created
> 
> It's better to not move this, but just add what compatibles it does or
> doesn't apply to.
> 
> > +
> > 
> >  On SoCs other than the A33 and V3s, there is one more clock required:
> >     - 'tcon-ch1': The clock driving the TCON channel 1
> > 
> > -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
> > -need one more reset line:
> > +When TCON support LVDS (all TCONs except TV TCON on A83T and those found
> > 
> > +in A13, H3, H5 and V3s SoCs), you need one more reset line:
> >     - 'lvds': The reset line driving the LVDS logic
> >  
> >  And on the A23, A31, A31s and A33, you need one more clock line:
> > @@ -226,6 +276,7 @@ supported.
> > 
> >  Required properties:
> >    - compatible: value must be one of:
> >      * allwinner,sun8i-a83t-de2-mixer-0
> > 
> > +    * allwinner,sun8i-a83t-de2-mixer-1
> > 
> >      * allwinner,sun8i-v3s-de2-mixer
> >    
> >    - reg: base address and size of the memory-mapped region.
> >    - clocks: phandles to the clocks feeding the mixer
> > 
> > @@ -261,7 +312,7 @@ Required properties:
> >    - allwinner,pipelines: list of phandle to the display engine
> >    
> >      frontends (DE 1.0) or mixers (DE 2.0) available.
> > 
> > -Example:
> > 
> > +Example 1:
> >  panel: panel {
> >  
> >  	compatible = "olimex,lcd-olinuxino-43-ts";
> > 
> > @@ -460,3 +511,135 @@ display-engine {
> > 
> >  	compatible = "allwinner,sun5i-a13-display-engine";
> >  	allwinner,pipelines = <&fe0>;
> >  
> >  };
> > 
> > +
> 
> > +Example 2:
> Is this really different enough to need an example? Examples don't
> need to enumerate all possible options. They are often wrong because
> they don't compile on their own and that creates a maintenance burden.

This example is for second generation of display engine so pipeline is 
different. Only TCON and connector examples are same, but 4 others are new, so 
I thought it would be nice to show an example for it. But I can remove it in 
next version if it is not needed.

Best regards,
Jernej

Re: [PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Škrabec]

Hi,

Dne ponedeljek, 29. januar 2018 ob 19:05:26 CET je Rob Herring napisal(a):
> On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
> > This commit adds all necessary compatibles and descriptions needed to
> > implement A83T HDMI pipeline.
> > 
> > Mixer is already properly described, so only compatible is added.
> > 
> > However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
> > contrary to all TCONs currently described. Because of that, TCON
> > documentation is extended.
> > 
> > A83T features Synopsys DW HDMI controller with a custom PHY which looks
> > like Synopsys Gen2 PHY with few additions. Since there is no
> > documentation, needed properties were found out through experimentation
> > and reading BSP code.
> > 
> > At the end, example is added for newer SoCs, which feature DE2 and DW
> > HDMI.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec-gGgVlfcn5nU@public.gmane.org>
> > ---
> > 
> >  .../bindings/display/sunxi/sun4i-drm.txt           | 197
> >  ++++++++++++++++++++- 1 file changed, 190 insertions(+), 7 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt index
> > cd626ee1147a..4fb380f3e53d 100644
> > --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > 
> > @@ -64,6 +64,52 @@ Required properties:
> >      first port should be the input endpoint. The second should be the
> >      output, usually to an HDMI connector.
> > 
> > +DWC HDMI TX Encoder
> > +-------------------
> > +
> > +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> > +with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
> > +
> > +These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
> > +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
> > +following device-specific properties.
> > +
> > +Required properties:
> > +
> > +  - compatible: value must be one of:
> > +    * "allwinner,sun8i-a83t-dw-hdmi"
> > +  - reg: base address and size of memory-mapped region
> > +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
> > +  - interrupts: HDMI interrupt number
> > +  - clocks: phandles to the clocks feeding the HDMI encoder
> > +    * iahb: the HDMI bus clock
> > +    * isfr: the HDMI register clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller
> > +  - reset-names: must be "ctrl"
> > +  - phys: phandle to the DWC HDMI PHY
> > +  - phy-names: must be "phy"
> > +
> > +  - ports: A ports node with endpoint definitions as defined in
> > +    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> > +    first port should be the input endpoint. The second should be the
> > +    output, usually to an HDMI connector.
> > +
> > +DWC HDMI PHY
> > +------------
> > +
> > +Required properties:
> > +  - compatible: value must be one of:
> > +    * allwinner,sun8i-a83t-hdmi-phy
> > +  - reg: base address and size of memory-mapped region
> > +  - clocks: phandles to the clocks feeding the HDMI PHY
> > +    * bus: the HDMI PHY interface clock
> > +    * mod: the HDMI PHY module clock
> > +    * tmds: TMDS clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller driving the PHY
> > +  - reset-names: must be "phy"
> > +
> > 
> >  TV Encoder
> >  ----------
> > 
> > @@ -94,24 +140,23 @@ Required properties:
> >     * allwinner,sun7i-a20-tcon
> >     * allwinner,sun8i-a33-tcon
> >     * allwinner,sun8i-a83t-tcon-lcd
> > 
> > +   * allwinner,sun8i-a83t-tcon-tv
> > 
> >     * allwinner,sun8i-v3s-tcon
> >   
> >   - reg: base address and size of memory-mapped region
> >   - interrupts: interrupt associated to this IP
> > 
> > - - clocks: phandles to the clocks feeding the TCON. Three are needed:
> > 
> > + - clocks: phandles to the clocks feeding the TCON. One is needed:
> >     - 'ahb': the interface clocks
> > 
> > -   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Well, it didn't look right before saying 3 are needed, but listing 2.
> However, you can't just change this as it affects all the other SoCs.
> This should probably be a separate patch.

I had a feeling that all items which are not common to all compatibles should 
be listed below and explained when they are needed. At least currently it's 
done this way.

> 
> >   - resets: phandles to the reset controllers driving the encoder
> >   
> >     - "lcd": the reset line for the TCON channel 0
> >   
> >   - clock-names: the clock names mentioned above
> >   - reset-names: the reset names mentioned above
> > 
> > - - clock-output-names: Name of the pixel clock created
> 
> Why is this removed?
> 
> >  - ports: A ports node with endpoint definitions as defined in
> >  
> >    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> >    first port should be the input endpoint, the second one the output
> > 
> > -  The output may have multiple endpoints. The TCON has two channels,
> > +  The output may have multiple endpoints. TCON can have two channels,
> 
> Perhaps you should say "can have 1 or 2 channels".

Ok.

> 
> >    usually with the first channel being used for the panels interfaces
> >    (RGB, LVDS, etc.), and the second being used for the outputs that
> >    require another controller (TV Encoder, HDMI, etc.). The endpoints
> > 
> > @@ -119,11 +164,16 @@ Required properties:
> >    channel the endpoint is associated to. If that property is not
> >    present, the endpoint number will be used as the channel number.
> > 
> > +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
> > +more clocks are needed:
> > +   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Looks like one clock to me.
> 
> > +   - clock-output-names: Name of the pixel clock created
> 
> It's better to not move this, but just add what compatibles it does or
> doesn't apply to.
> 
> > +
> > 
> >  On SoCs other than the A33 and V3s, there is one more clock required:
> >     - 'tcon-ch1': The clock driving the TCON channel 1
> > 
> > -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
> > -need one more reset line:
> > +When TCON support LVDS (all TCONs except TV TCON on A83T and those found
> > 
> > +in A13, H3, H5 and V3s SoCs), you need one more reset line:
> >     - 'lvds': The reset line driving the LVDS logic
> >  
> >  And on the A23, A31, A31s and A33, you need one more clock line:
> > @@ -226,6 +276,7 @@ supported.
> > 
> >  Required properties:
> >    - compatible: value must be one of:
> >      * allwinner,sun8i-a83t-de2-mixer-0
> > 
> > +    * allwinner,sun8i-a83t-de2-mixer-1
> > 
> >      * allwinner,sun8i-v3s-de2-mixer
> >    
> >    - reg: base address and size of the memory-mapped region.
> >    - clocks: phandles to the clocks feeding the mixer
> > 
> > @@ -261,7 +312,7 @@ Required properties:
> >    - allwinner,pipelines: list of phandle to the display engine
> >    
> >      frontends (DE 1.0) or mixers (DE 2.0) available.
> > 
> > -Example:
> > 
> > +Example 1:
> >  panel: panel {
> >  
> >  	compatible = "olimex,lcd-olinuxino-43-ts";
> > 
> > @@ -460,3 +511,135 @@ display-engine {
> > 
> >  	compatible = "allwinner,sun5i-a13-display-engine";
> >  	allwinner,pipelines = <&fe0>;
> >  
> >  };
> > 
> > +
> 
> > +Example 2:
> Is this really different enough to need an example? Examples don't
> need to enumerate all possible options. They are often wrong because
> they don't compile on their own and that creates a maintenance burden.

This example is for second generation of display engine so pipeline is 
different. Only TCON and connector examples are same, but 4 others are new, so 
I thought it would be nice to show an example for it. But I can remove it in 
next version if it is not needed.

Best regards,
Jernej

[PATCH v3 06/12] dt-bindings: display: sun4i-drm: Add A83T HDMI pipeline

[Jernej Škrabec]

Hi,

Dne ponedeljek, 29. januar 2018 ob 19:05:26 CET je Rob Herring napisal(a):
> On Wed, Jan 17, 2018 at 09:14:15PM +0100, Jernej Skrabec wrote:
> > This commit adds all necessary compatibles and descriptions needed to
> > implement A83T HDMI pipeline.
> > 
> > Mixer is already properly described, so only compatible is added.
> > 
> > However, A83T TV TCON, which is connected to HDMI, doesn't have channel 0,
> > contrary to all TCONs currently described. Because of that, TCON
> > documentation is extended.
> > 
> > A83T features Synopsys DW HDMI controller with a custom PHY which looks
> > like Synopsys Gen2 PHY with few additions. Since there is no
> > documentation, needed properties were found out through experimentation
> > and reading BSP code.
> > 
> > At the end, example is added for newer SoCs, which feature DE2 and DW
> > HDMI.
> > 
> > Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
> > ---
> > 
> >  .../bindings/display/sunxi/sun4i-drm.txt           | 197
> >  ++++++++++++++++++++- 1 file changed, 190 insertions(+), 7 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt index
> > cd626ee1147a..4fb380f3e53d 100644
> > --- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > +++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
> > 
> > @@ -64,6 +64,52 @@ Required properties:
> >      first port should be the input endpoint. The second should be the
> >      output, usually to an HDMI connector.
> > 
> > +DWC HDMI TX Encoder
> > +-------------------
> > +
> > +The HDMI transmitter is a Synopsys DesignWare HDMI 1.4 TX controller IP
> > +with Allwinner's own PHY IP. It supports audio and video outputs and CEC.
> > +
> > +These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
> > +Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt with the
> > +following device-specific properties.
> > +
> > +Required properties:
> > +
> > +  - compatible: value must be one of:
> > +    * "allwinner,sun8i-a83t-dw-hdmi"
> > +  - reg: base address and size of memory-mapped region
> > +  - reg-io-width: See dw_hdmi.txt. Shall be 1.
> > +  - interrupts: HDMI interrupt number
> > +  - clocks: phandles to the clocks feeding the HDMI encoder
> > +    * iahb: the HDMI bus clock
> > +    * isfr: the HDMI register clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller
> > +  - reset-names: must be "ctrl"
> > +  - phys: phandle to the DWC HDMI PHY
> > +  - phy-names: must be "phy"
> > +
> > +  - ports: A ports node with endpoint definitions as defined in
> > +    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> > +    first port should be the input endpoint. The second should be the
> > +    output, usually to an HDMI connector.
> > +
> > +DWC HDMI PHY
> > +------------
> > +
> > +Required properties:
> > +  - compatible: value must be one of:
> > +    * allwinner,sun8i-a83t-hdmi-phy
> > +  - reg: base address and size of memory-mapped region
> > +  - clocks: phandles to the clocks feeding the HDMI PHY
> > +    * bus: the HDMI PHY interface clock
> > +    * mod: the HDMI PHY module clock
> > +    * tmds: TMDS clock
> > +  - clock-names: the clock names mentioned above
> > +  - resets: phandle to the reset controller driving the PHY
> > +  - reset-names: must be "phy"
> > +
> > 
> >  TV Encoder
> >  ----------
> > 
> > @@ -94,24 +140,23 @@ Required properties:
> >     * allwinner,sun7i-a20-tcon
> >     * allwinner,sun8i-a33-tcon
> >     * allwinner,sun8i-a83t-tcon-lcd
> > 
> > +   * allwinner,sun8i-a83t-tcon-tv
> > 
> >     * allwinner,sun8i-v3s-tcon
> >   
> >   - reg: base address and size of memory-mapped region
> >   - interrupts: interrupt associated to this IP
> > 
> > - - clocks: phandles to the clocks feeding the TCON. Three are needed:
> > 
> > + - clocks: phandles to the clocks feeding the TCON. One is needed:
> >     - 'ahb': the interface clocks
> > 
> > -   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Well, it didn't look right before saying 3 are needed, but listing 2.
> However, you can't just change this as it affects all the other SoCs.
> This should probably be a separate patch.

I had a feeling that all items which are not common to all compatibles should 
be listed below and explained when they are needed. At least currently it's 
done this way.

> 
> >   - resets: phandles to the reset controllers driving the encoder
> >   
> >     - "lcd": the reset line for the TCON channel 0
> >   
> >   - clock-names: the clock names mentioned above
> >   - reset-names: the reset names mentioned above
> > 
> > - - clock-output-names: Name of the pixel clock created
> 
> Why is this removed?
> 
> >  - ports: A ports node with endpoint definitions as defined in
> >  
> >    Documentation/devicetree/bindings/media/video-interfaces.txt. The
> >    first port should be the input endpoint, the second one the output
> > 
> > -  The output may have multiple endpoints. The TCON has two channels,
> > +  The output may have multiple endpoints. TCON can have two channels,
> 
> Perhaps you should say "can have 1 or 2 channels".

Ok.

> 
> >    usually with the first channel being used for the panels interfaces
> >    (RGB, LVDS, etc.), and the second being used for the outputs that
> >    require another controller (TV Encoder, HDMI, etc.). The endpoints
> > 
> > @@ -119,11 +164,16 @@ Required properties:
> >    channel the endpoint is associated to. If that property is not
> >    present, the endpoint number will be used as the channel number.
> > 
> > +When TCON supports channel 0 (all TCONs except TV TCON on A83T), two
> > +more clocks are needed:
> > +   - 'tcon-ch0': The clock driving the TCON channel 0
> 
> Looks like one clock to me.
> 
> > +   - clock-output-names: Name of the pixel clock created
> 
> It's better to not move this, but just add what compatibles it does or
> doesn't apply to.
> 
> > +
> > 
> >  On SoCs other than the A33 and V3s, there is one more clock required:
> >     - 'tcon-ch1': The clock driving the TCON channel 1
> > 
> > -On SoCs that support LVDS (all SoCs but the A13, H3, H5 and V3s), you
> > -need one more reset line:
> > +When TCON support LVDS (all TCONs except TV TCON on A83T and those found
> > 
> > +in A13, H3, H5 and V3s SoCs), you need one more reset line:
> >     - 'lvds': The reset line driving the LVDS logic
> >  
> >  And on the A23, A31, A31s and A33, you need one more clock line:
> > @@ -226,6 +276,7 @@ supported.
> > 
> >  Required properties:
> >    - compatible: value must be one of:
> >      * allwinner,sun8i-a83t-de2-mixer-0
> > 
> > +    * allwinner,sun8i-a83t-de2-mixer-1
> > 
> >      * allwinner,sun8i-v3s-de2-mixer
> >    
> >    - reg: base address and size of the memory-mapped region.
> >    - clocks: phandles to the clocks feeding the mixer
> > 
> > @@ -261,7 +312,7 @@ Required properties:
> >    - allwinner,pipelines: list of phandle to the display engine
> >    
> >      frontends (DE 1.0) or mixers (DE 2.0) available.
> > 
> > -Example:
> > 
> > +Example 1:
> >  panel: panel {
> >  
> >  	compatible = "olimex,lcd-olinuxino-43-ts";
> > 
> > @@ -460,3 +511,135 @@ display-engine {
> > 
> >  	compatible = "allwinner,sun5i-a13-display-engine";
> >  	allwinner,pipelines = <&fe0>;
> >  
> >  };
> > 
> > +
> 
> > +Example 2:
> Is this really different enough to need an example? Examples don't
> need to enumerate all possible options. They are often wrong because
> they don't compile on their own and that creates a maintenance burden.

This example is for second generation of display engine so pipeline is 
different. Only TCON and connector examples are same, but 4 others are new, so 
I thought it would be nice to show an example for it. But I can remove it in 
next version if it is not needed.

Best regards,
Jernej