[PATCH 0/2] clk: meson8b: allow the HDMI driver to manage "hdmi_sys"

[PATCH 0/2] clk: meson8b: allow the HDMI driver to manage "hdmi_sys"

[Martin Blumenstingl]

The "hdmi_sys" clock is driving the HDMI TX controller. The
controller's IP seems to use this clock for example to derived the DDC
clock.

Testing has shown that we can disable this clock without locking up the
system (as long as we don't read the HDMI TX registers while this clock
is disabled - this can't happen as we don't have a driver yet and once
we have one that driver will enable this clock).


Martin Blumenstingl (2):
  clk: meson8b: export the HDMI system clock
  clk: meson: meson8b: make the hdmi_sys clock tree mutable

 drivers/clk/meson/meson8b.c              | 6 +++---
 drivers/clk/meson/meson8b.h              | 1 -
 include/dt-bindings/clock/meson8b-clkc.h | 1 +
 3 files changed, 4 insertions(+), 4 deletions(-)

-- 
2.26.0


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[PATCH 1/2] clk: meson8b: export the HDMI system clock

[Martin Blumenstingl]

Export the HDMI system clock (used by the HDMI transmitter) so it can be
used in the dt-bindings.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/clk/meson/meson8b.h              | 1 -
 include/dt-bindings/clock/meson8b-clkc.h | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h
index c889fbeec30f..94ce3ef0c1d5 100644
--- a/drivers/clk/meson/meson8b.h
+++ b/drivers/clk/meson/meson8b.h
@@ -146,7 +146,6 @@
 #define CLKID_CTS_VDAC0		171
 #define CLKID_HDMI_SYS_SEL	172
 #define CLKID_HDMI_SYS_DIV	173
-#define CLKID_HDMI_SYS		174
 #define CLKID_MALI_0_SEL	175
 #define CLKID_MALI_0_DIV	176
 #define CLKID_MALI_0		177
diff --git a/include/dt-bindings/clock/meson8b-clkc.h b/include/dt-bindings/clock/meson8b-clkc.h
index 68862aaf977e..4c5965ae1df4 100644
--- a/include/dt-bindings/clock/meson8b-clkc.h
+++ b/include/dt-bindings/clock/meson8b-clkc.h
@@ -107,6 +107,7 @@
 #define CLKID_PERIPH		126
 #define CLKID_AXI		128
 #define CLKID_L2_DRAM		130
+#define CLKID_HDMI_SYS		174
 #define CLKID_VPU		190
 #define CLKID_VDEC_1		196
 #define CLKID_VDEC_HCODEC	199
-- 
2.26.0


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Re: [PATCH 1/2] clk: meson8b: export the HDMI system clock

[Rob Herring]

On Tue, 31 Mar 2020 01:45:34 +0200, Martin Blumenstingl wrote:
> Export the HDMI system clock (used by the HDMI transmitter) so it can be
> used in the dt-bindings.
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> ---
>  drivers/clk/meson/meson8b.h              | 1 -
>  include/dt-bindings/clock/meson8b-clkc.h | 1 +
>  2 files changed, 1 insertion(+), 1 deletion(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

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[PATCH 2/2] clk: meson: meson8b: make the hdmi_sys clock tree mutable

[Martin Blumenstingl]

The HDMI TX controller requires the hdmi_sys clock to be enabled. Allow
changing the whole clock tree now that we know that one of our drivers
requires this.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/clk/meson/meson8b.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 34a70c4b4899..7c55c695cbae 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -1725,7 +1725,7 @@ static struct clk_regmap meson8b_hdmi_sys_sel = {
 	},
 	.hw.init = &(struct clk_init_data){
 		.name = "hdmi_sys_sel",
-		.ops = &clk_regmap_mux_ro_ops,
+		.ops = &clk_regmap_mux_ops,
 		/* FIXME: all other parents are unknown */
 		.parent_data = &(const struct clk_parent_data) {
 			.fw_name = "xtal",
@@ -1745,7 +1745,7 @@ static struct clk_regmap meson8b_hdmi_sys_div = {
 	},
 	.hw.init = &(struct clk_init_data){
 		.name = "hdmi_sys_div",
-		.ops = &clk_regmap_divider_ro_ops,
+		.ops = &clk_regmap_divider_ops,
 		.parent_hws = (const struct clk_hw *[]) {
 			&meson8b_hdmi_sys_sel.hw
 		},
@@ -1761,7 +1761,7 @@ static struct clk_regmap meson8b_hdmi_sys = {
 	},
 	.hw.init = &(struct clk_init_data) {
 		.name = "hdmi_sys",
-		.ops = &clk_regmap_gate_ro_ops,
+		.ops = &clk_regmap_gate_ops,
 		.parent_hws = (const struct clk_hw *[]) {
 			&meson8b_hdmi_sys_div.hw
 		},
-- 
2.26.0


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Re: [PATCH 0/2] clk: meson8b: allow the HDMI driver to manage "hdmi_sys"

[Jerome Brunet]

On Tue 31 Mar 2020 at 01:45, Martin Blumenstingl <martin.blumenstingl@googlemail.com> wrote:
>
> Martin Blumenstingl (2):
>   clk: meson8b: export the HDMI system clock
>   clk: meson: meson8b: make the hdmi_sys clock tree mutable
>
>  drivers/clk/meson/meson8b.c              | 6 +++---
>  drivers/clk/meson/meson8b.h              | 1 -
>  include/dt-bindings/clock/meson8b-clkc.h | 1 +
>  3 files changed, 4 insertions(+), 4 deletions(-)

Applied, Thx

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