[PATCH 00/11] drm/vc4: hdmi: Yet Another Approach to HDMI YUV output

[PATCH 00/11] drm/vc4: hdmi: Yet Another Approach to HDMI YUV output

[Maxime Ripard]

Hi,

This is another attempt at supporting the HDMI YUV output in the vc4 HDMI
driver.

This is a follow-up of
https://lore.kernel.org/dri-devel/20210317154352.732095-1-maxime@cerno.tech/

And the discussions that occured recently on the mailing lists and IRC about
this.

The series mentioned above had multiple issues, the main one being that it was
a bit too much complicated for what we wanted to achieve. This series is taking
a much simpler approach with an ad-hoc solution.

I think some parts of it could still be moved to KMS helpers (notably, the
output format enum, and the helper to set the infoframe for it) and structures
(the output format stored in drm_connector_state). This would also interact
nicely with the work done here:

https://lore.kernel.org/dri-devel/20211118103814.524670-1-maxime@cerno.tech/

This can come as a second step though.

The other issues with the first attempt was that nothing was reported to
userspace about the decision we made about the format, and that this decision
was essentially policy, without any way for the userspace to influence it.

Those two points however are being worked on by Werner in a cross-driver
effort:

https://lore.kernel.org/dri-devel/e452775c-5b95-bbfd-e818-f1480f556336@tuxedocomputers.com/

Since it's a KMS decision, I don't think we should hold off any driver as long
as it's consistent with what the other drivers are doing.

Let me know what you think,
Maxime

Maxime Ripard (11):
  drm/edid: Rename drm_hdmi_avi_infoframe_colorspace to _colorimetry
  drm/vc4: hdmi: Add full range RGB helper
  drm/vc4: hdmi: Use full range helper in csc functions
  drm/vc4: hdmi: Move XBAR setup to csc_setup
  drm/vc4: hdmi: Replace CSC_CTL hardcoded value by defines
  drm/vc4: hdmi: Define colorspace matrices
  drm/vc4: hdmi: Change CSC callback prototype
  drm/vc4: hdmi: Move clock validation to its own function
  drm/vc4: hdmi: Move clock calculation into its own function
  drm/vc4: hdmi: Support HDMI YUV output
  drm/vc4: hdmi: Force YUV422 if the rate is too high

 drivers/gpu/drm/drm_edid.c                  |   8 +-
 drivers/gpu/drm/i915/display/intel_hdmi.c   |   2 +-
 drivers/gpu/drm/i915/display/intel_lspcon.c |   2 +-
 drivers/gpu/drm/vc4/vc4_hdmi.c              | 324 +++++++++++++++-----
 drivers/gpu/drm/vc4/vc4_hdmi.h              |  13 +-
 drivers/gpu/drm/vc4/vc4_hdmi_regs.h         |   6 +
 drivers/gpu/drm/vc4/vc4_regs.h              |  19 ++
 include/drm/drm_edid.h                      |   4 +-
 8 files changed, 290 insertions(+), 88 deletions(-)

-- 
2.33.1

[PATCH 01/11] drm/edid: Rename drm_hdmi_avi_infoframe_colorspace to _colorimetry

[Maxime Ripard]

The drm_hdmi_avi_infoframe_colorspace() function actually sets the
colorimetry and extended_colorimetry fields in the hdmi_avi_infoframe
structure with DRM_MODE_COLORIMETRY_* values.

To make things worse, the hdmi_avi_infoframe structure also has a
colorspace field used to signal whether an RGB or YUV output is being
used.

Let's remove the inconsistency and allow for the colorspace usage by
renaming the function.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/drm_edid.c                  | 8 ++++----
 drivers/gpu/drm/i915/display/intel_hdmi.c   | 2 +-
 drivers/gpu/drm/i915/display/intel_lspcon.c | 2 +-
 drivers/gpu/drm/vc4/vc4_hdmi.c              | 2 +-
 include/drm/drm_edid.h                      | 4 ++--
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 12893e7be89b..13644dd579b4 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -5891,13 +5891,13 @@ static const u32 hdmi_colorimetry_val[] = {
 #undef ACE
 
 /**
- * drm_hdmi_avi_infoframe_colorspace() - fill the HDMI AVI infoframe
- *                                       colorspace information
+ * drm_hdmi_avi_infoframe_colorimetry() - fill the HDMI AVI infoframe
+ *                                       colorimetry information
  * @frame: HDMI AVI infoframe
  * @conn_state: connector state
  */
 void
-drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
+drm_hdmi_avi_infoframe_colorimetry(struct hdmi_avi_infoframe *frame,
 				  const struct drm_connector_state *conn_state)
 {
 	u32 colorimetry_val;
@@ -5916,7 +5916,7 @@ drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
 	frame->extended_colorimetry = (colorimetry_val >> 2) &
 					EXTENDED_COLORIMETRY_MASK;
 }
-EXPORT_SYMBOL(drm_hdmi_avi_infoframe_colorspace);
+EXPORT_SYMBOL(drm_hdmi_avi_infoframe_colorimetry);
 
 /**
  * drm_hdmi_avi_infoframe_quant_range() - fill the HDMI AVI infoframe
diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
index 3b5b9e7b05b7..96e508ddc4af 100644
--- a/drivers/gpu/drm/i915/display/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
@@ -730,7 +730,7 @@ intel_hdmi_compute_avi_infoframe(struct intel_encoder *encoder,
 	else
 		frame->colorspace = HDMI_COLORSPACE_RGB;
 
-	drm_hdmi_avi_infoframe_colorspace(frame, conn_state);
+	drm_hdmi_avi_infoframe_colorimetry(frame, conn_state);
 
 	/* nonsense combination */
 	drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index 05d2d750fa53..092a925c6cf5 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -537,7 +537,7 @@ void lspcon_set_infoframes(struct intel_encoder *encoder,
 		frame.avi.colorspace = HDMI_COLORSPACE_RGB;
 
 	/* Set the Colorspace as per the HDMI spec */
-	drm_hdmi_avi_infoframe_colorspace(&frame.avi, conn_state);
+	drm_hdmi_avi_infoframe_colorimetry(&frame.avi, conn_state);
 
 	/* nonsense combination */
 	drm_WARN_ON(encoder->base.dev, crtc_state->limited_color_range &&
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 053fbaf765ca..be39e55ae113 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -502,7 +502,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 					   vc4_encoder->limited_rgb_range ?
 					   HDMI_QUANTIZATION_RANGE_LIMITED :
 					   HDMI_QUANTIZATION_RANGE_FULL);
-	drm_hdmi_avi_infoframe_colorspace(&frame.avi, cstate);
+	drm_hdmi_avi_infoframe_colorimetry(&frame.avi, cstate);
 	drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
 
 	vc4_hdmi_write_infoframe(encoder, &frame);
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 18f6c700f6d0..144c495b99c4 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -401,8 +401,8 @@ drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame,
 					    const struct drm_display_mode *mode);
 
 void
-drm_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
-				  const struct drm_connector_state *conn_state);
+drm_hdmi_avi_infoframe_colorimetry(struct hdmi_avi_infoframe *frame,
+				   const struct drm_connector_state *conn_state);
 
 void
 drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame,
-- 
2.33.1

[PATCH 02/11] drm/vc4: hdmi: Add full range RGB helper

[Maxime Ripard]

We're going to need to tell whether we want to run with a full or
limited range RGB output in multiple places in the code, so let's create
a helper that will return whether we need with full range or not.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index be39e55ae113..7966e3b00332 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -104,6 +104,15 @@ static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode)
 	return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK;
 }
 
+static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi,
+				       const struct drm_display_mode *mode)
+{
+	struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
+
+	return !vc4_encoder->hdmi_monitor ||
+		drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL;
+}
+
 static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
 {
 	struct drm_info_node *node = (struct drm_info_node *)m->private;
@@ -1119,8 +1128,7 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 
 	mutex_lock(&vc4_hdmi->mutex);
 
-	if (vc4_encoder->hdmi_monitor &&
-	    drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED) {
+	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
 		if (vc4_hdmi->variant->csc_setup)
 			vc4_hdmi->variant->csc_setup(vc4_hdmi, true);
 
-- 
2.33.1

[PATCH 03/11] drm/vc4: hdmi: Use full range helper in csc functions

[Maxime Ripard]

The CSC callbacks takes a boolean as an argument to tell whether we're
using the full range or limited range RGB.

However, with the upcoming YUV support, the logic will be a bit more
complex. In order to address this, let's make the callbacks take the
entire mode, and call our new helper to tell whether the full or limited
range RGB should be used.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 31 +++++++++++--------------------
 drivers/gpu/drm/vc4/vc4_hdmi.h |  4 ++--
 2 files changed, 13 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 7966e3b00332..47ff4507f017 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -490,7 +490,6 @@ static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
-	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	struct drm_connector *connector = &vc4_hdmi->connector;
 	struct drm_connector_state *cstate = connector->state;
 	const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
@@ -508,9 +507,9 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 
 	drm_hdmi_avi_infoframe_quant_range(&frame.avi,
 					   connector, mode,
-					   vc4_encoder->limited_rgb_range ?
-					   HDMI_QUANTIZATION_RANGE_LIMITED :
-					   HDMI_QUANTIZATION_RANGE_FULL);
+					   vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode) ?
+					   HDMI_QUANTIZATION_RANGE_FULL :
+					   HDMI_QUANTIZATION_RANGE_LIMITED);
 	drm_hdmi_avi_infoframe_colorimetry(&frame.avi, cstate);
 	drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
 
@@ -735,7 +734,8 @@ static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
 	mutex_unlock(&vc4_hdmi->mutex);
 }
 
-static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
+static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
+			       const struct drm_display_mode *mode)
 {
 	unsigned long flags;
 	u32 csc_ctl;
@@ -745,7 +745,7 @@ static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
 	csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
 				VC4_HD_CSC_CTL_ORDER);
 
-	if (enable) {
+	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
 		/* CEA VICs other than #1 requre limited range RGB
 		 * output unless overridden by an AVI infoframe.
 		 * Apply a colorspace conversion to squash 0-255 down
@@ -775,7 +775,8 @@ static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
 	spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 }
 
-static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
+static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
+			       const struct drm_display_mode *mode)
 {
 	unsigned long flags;
 	u32 csc_ctl;
@@ -784,7 +785,7 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi, bool enable)
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 
-	if (enable) {
+	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
 		/* CEA VICs other than #1 requre limited range RGB
 		 * output unless overridden by an AVI infoframe.
 		 * Apply a colorspace conversion to squash 0-255 down
@@ -1123,22 +1124,12 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 	struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
-	struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
 	unsigned long flags;
 
 	mutex_lock(&vc4_hdmi->mutex);
 
-	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
-		if (vc4_hdmi->variant->csc_setup)
-			vc4_hdmi->variant->csc_setup(vc4_hdmi, true);
-
-		vc4_encoder->limited_rgb_range = true;
-	} else {
-		if (vc4_hdmi->variant->csc_setup)
-			vc4_hdmi->variant->csc_setup(vc4_hdmi, false);
-
-		vc4_encoder->limited_rgb_range = false;
-	}
+	if (vc4_hdmi->variant->csc_setup)
+		vc4_hdmi->variant->csc_setup(vc4_hdmi, mode);
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 	HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 36c0b082a43b..4a5536975bf6 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -12,7 +12,6 @@
 struct vc4_hdmi_encoder {
 	struct vc4_encoder base;
 	bool hdmi_monitor;
-	bool limited_rgb_range;
 };
 
 static inline struct vc4_hdmi_encoder *
@@ -77,7 +76,8 @@ struct vc4_hdmi_variant {
 	void (*reset)(struct vc4_hdmi *vc4_hdmi);
 
 	/* Callback to enable / disable the CSC */
-	void (*csc_setup)(struct vc4_hdmi *vc4_hdmi, bool enable);
+	void (*csc_setup)(struct vc4_hdmi *vc4_hdmi,
+			  const struct drm_display_mode *mode);
 
 	/* Callback to configure the video timings in the HDMI block */
 	void (*set_timings)(struct vc4_hdmi *vc4_hdmi,
-- 
2.33.1

[PATCH 04/11] drm/vc4: hdmi: Move XBAR setup to csc_setup

[Maxime Ripard]

On the BCM2711, the HDMI_VEC_INTERFACE_XBAR register configuration
depends on whether we're using an RGB or YUV output. Let's move that
configuration to the CSC setup.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 47ff4507f017..0f8b1e907fae 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -785,6 +785,8 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 
+	HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021);
+
 	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
 		/* CEA VICs other than #1 requre limited range RGB
 		 * output unless overridden by an AVI infoframe.
@@ -899,7 +901,6 @@ static void vc5_hdmi_set_timings(struct vc4_hdmi *vc4_hdmi,
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 
-	HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021);
 	HDMI_WRITE(HDMI_HORZA,
 		   (vsync_pos ? VC5_HDMI_HORZA_VPOS : 0) |
 		   (hsync_pos ? VC5_HDMI_HORZA_HPOS : 0) |
-- 
2.33.1

[PATCH 05/11] drm/vc4: hdmi: Replace CSC_CTL hardcoded value by defines

[Maxime Ripard]

On BCM2711, the HDMI_CSC_CTL register value has been hardcoded to an
opaque value. Let's replace it with properly defined values.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 5 ++---
 drivers/gpu/drm/vc4/vc4_regs.h | 3 +++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 0f8b1e907fae..682c3c907cbe 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -779,9 +779,8 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 			       const struct drm_display_mode *mode)
 {
 	unsigned long flags;
-	u32 csc_ctl;
-
-	csc_ctl = 0x07;	/* RGB_CONVERT_MODE = custom matrix, || USE_RGB_TO_YCBCR */
+	u32 csc_ctl = VC5_MT_CP_CSC_CTL_ENABLE | VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
+							       VC5_MT_CP_CSC_CTL_MODE);
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 
diff --git a/drivers/gpu/drm/vc4/vc4_regs.h b/drivers/gpu/drm/vc4/vc4_regs.h
index 489f921ef44d..952f2aad0785 100644
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -774,6 +774,9 @@ enum {
 # define VC4_HD_CSC_CTL_RGB2YCC			BIT(1)
 # define VC4_HD_CSC_CTL_ENABLE			BIT(0)
 
+# define VC5_MT_CP_CSC_CTL_ENABLE		BIT(2)
+# define VC5_MT_CP_CSC_CTL_MODE_MASK		VC4_MASK(1, 0)
+
 # define VC4_DVP_HT_CLOCK_STOP_PIXEL		BIT(1)
 
 /* HVS display list information. */
-- 
2.33.1

[PATCH 06/11] drm/vc4: hdmi: Define colorspace matrices

[Maxime Ripard]

The current CSC setup code for the BCM2711 uses a sequence of register
writes to configure the CSC depending on whether we output using a full
or limited range.

However, with the upcoming introduction of the YUV output, we're going
to add new matrices to perform the conversions, so we should switch to
something a bit more flexible that takes the matrix as an argument and
programs the CSC accordingly.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 79 +++++++++++++++++++++-------------
 1 file changed, 50 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 682c3c907cbe..7fdb49e790f3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -775,6 +775,52 @@ static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 	spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
 }
 
+
+/*
+ * If we need to output Full Range RGB, then use the unity matrix
+ *
+ * [ 1      0      0      0]
+ * [ 0      1      0      0]
+ * [ 0      0      1      0]
+ *
+ * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
+ */
+static const u16 vc5_hdmi_csc_full_rgb_unity[3][4] = {
+	{ 0x2000, 0x0000, 0x0000, 0x0000 },
+	{ 0x0000, 0x2000, 0x0000, 0x0000 },
+	{ 0x0000, 0x0000, 0x2000, 0x0000 },
+};
+
+/*
+ * CEA VICs other than #1 require limited range RGB output unless
+ * overridden by an AVI infoframe. Apply a colorspace conversion to
+ * squash 0-255 down to 16-235. The matrix here is:
+ *
+ * [ 0.8594 0      0      16]
+ * [ 0      0.8594 0      16]
+ * [ 0      0      0.8594 16]
+ *
+ * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
+ */
+static const u16 vc5_hdmi_csc_full_rgb_to_limited_rgb[3][4] = {
+	{ 0x1b80, 0x0000, 0x0000, 0x0400 },
+	{ 0x0000, 0x1b80, 0x0000, 0x0400 },
+	{ 0x0000, 0x0000, 0x1b80, 0x0400 },
+};
+
+static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
+				    const u16 coeffs[3][4])
+{
+	lockdep_assert_held(&vc4_hdmi->hw_lock);
+
+	HDMI_WRITE(HDMI_CSC_12_11, (coeffs[0][1] << 16) | coeffs[0][0]);
+	HDMI_WRITE(HDMI_CSC_14_13, (coeffs[0][3] << 16) | coeffs[0][2]);
+	HDMI_WRITE(HDMI_CSC_22_21, (coeffs[1][1] << 16) | coeffs[1][0]);
+	HDMI_WRITE(HDMI_CSC_24_23, (coeffs[1][3] << 16) | coeffs[1][2]);
+	HDMI_WRITE(HDMI_CSC_32_31, (coeffs[2][1] << 16) | coeffs[2][0]);
+	HDMI_WRITE(HDMI_CSC_34_33, (coeffs[2][3] << 16) | coeffs[2][2]);
+}
+
 static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 			       const struct drm_display_mode *mode)
 {
@@ -786,35 +832,10 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 
 	HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021);
 
-	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
-		/* CEA VICs other than #1 requre limited range RGB
-		 * output unless overridden by an AVI infoframe.
-		 * Apply a colorspace conversion to squash 0-255 down
-		 * to 16-235.  The matrix here is:
-		 *
-		 * [ 0.8594 0      0      16]
-		 * [ 0      0.8594 0      16]
-		 * [ 0      0      0.8594 16]
-		 * [ 0      0      0       1]
-		 * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
-		 */
-		HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x1b80);
-		HDMI_WRITE(HDMI_CSC_14_13, (0x0400 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_22_21, (0x1b80 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_24_23, (0x0400 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_34_33, (0x0400 << 16) | 0x1b80);
-	} else {
-		/* Still use the matrix for full range, but make it unity.
-		 * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
-		 */
-		HDMI_WRITE(HDMI_CSC_12_11, (0x0000 << 16) | 0x2000);
-		HDMI_WRITE(HDMI_CSC_14_13, (0x0000 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_22_21, (0x2000 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_24_23, (0x0000 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_32_31, (0x0000 << 16) | 0x0000);
-		HDMI_WRITE(HDMI_CSC_34_33, (0x0000 << 16) | 0x2000);
-	}
+	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode))
+		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_limited_rgb);
+	else
+		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_unity);
 
 	HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
 
-- 
2.33.1

[PATCH 07/11] drm/vc4: hdmi: Change CSC callback prototype

[Maxime Ripard]

In order to support the YUV output, we'll need the atomic state to know
what is the state of the associated property in the CSC setup callback.

Let's change the prototype of that callback to allow us to access it.

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 7 ++++++-
 drivers/gpu/drm/vc4/vc4_hdmi.h | 1 +
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 7fdb49e790f3..d79a70bae7f2 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -735,6 +735,7 @@ static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
 }
 
 static void vc4_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
+			       struct drm_connector_state *state,
 			       const struct drm_display_mode *mode)
 {
 	unsigned long flags;
@@ -822,6 +823,7 @@ static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
 }
 
 static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
+			       struct drm_connector_state *state,
 			       const struct drm_display_mode *mode)
 {
 	unsigned long flags;
@@ -1144,13 +1146,16 @@ static void vc4_hdmi_encoder_pre_crtc_enable(struct drm_encoder *encoder,
 					     struct drm_atomic_state *state)
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+	struct drm_connector *connector = &vc4_hdmi->connector;
 	struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
+	struct drm_connector_state *conn_state =
+		drm_atomic_get_new_connector_state(state, connector);
 	unsigned long flags;
 
 	mutex_lock(&vc4_hdmi->mutex);
 
 	if (vc4_hdmi->variant->csc_setup)
-		vc4_hdmi->variant->csc_setup(vc4_hdmi, mode);
+		vc4_hdmi->variant->csc_setup(vc4_hdmi, conn_state, mode);
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 	HDMI_WRITE(HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 4a5536975bf6..2b6aaafc020a 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -77,6 +77,7 @@ struct vc4_hdmi_variant {
 
 	/* Callback to enable / disable the CSC */
 	void (*csc_setup)(struct vc4_hdmi *vc4_hdmi,
+			  struct drm_connector_state *state,
 			  const struct drm_display_mode *mode);
 
 	/* Callback to configure the video timings in the HDMI block */
-- 
2.33.1

[PATCH 08/11] drm/vc4: hdmi: Move clock validation to its own function

[Maxime Ripard]

Our code is doing the same clock rate validation in multiple instances.
Let's create a helper to share the rate validation.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index d79a70bae7f2..9952b13eeb6e 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1262,6 +1262,19 @@ static void vc4_hdmi_encoder_atomic_mode_set(struct drm_encoder *encoder,
 	mutex_unlock(&vc4_hdmi->mutex);
 }
 
+static enum drm_mode_status
+vc4_hdmi_encoder_clock_valid(struct vc4_hdmi *vc4_hdmi,
+			     unsigned long clock)
+{
+	if (clock > vc4_hdmi->variant->max_pixel_clock)
+		return MODE_CLOCK_HIGH;
+
+	if (vc4_hdmi->disable_4kp60 && clock > HDMI_14_MAX_TMDS_CLK)
+		return MODE_CLOCK_HIGH;
+
+	return MODE_OK;
+}
+
 #define WIFI_2_4GHz_CH1_MIN_FREQ	2400000000ULL
 #define WIFI_2_4GHz_CH1_MAX_FREQ	2422000000ULL
 
@@ -1305,10 +1318,7 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
 	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 		pixel_rate = pixel_rate * 2;
 
-	if (pixel_rate > vc4_hdmi->variant->max_pixel_clock)
-		return -EINVAL;
-
-	if (vc4_hdmi->disable_4kp60 && (pixel_rate > HDMI_14_MAX_TMDS_CLK))
+	if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, pixel_rate) != MODE_OK)
 		return -EINVAL;
 
 	vc4_state->pixel_rate = pixel_rate;
@@ -1327,13 +1337,7 @@ vc4_hdmi_encoder_mode_valid(struct drm_encoder *encoder,
 	     (mode->hsync_end % 2) || (mode->htotal % 2)))
 		return MODE_H_ILLEGAL;
 
-	if ((mode->clock * 1000) > vc4_hdmi->variant->max_pixel_clock)
-		return MODE_CLOCK_HIGH;
-
-	if (vc4_hdmi->disable_4kp60 && vc4_hdmi_mode_needs_scrambling(mode))
-		return MODE_CLOCK_HIGH;
-
-	return MODE_OK;
+	return vc4_hdmi_encoder_clock_valid(vc4_hdmi, mode->crtc_clock * 1000);
 }
 
 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
-- 
2.33.1

[PATCH 09/11] drm/vc4: hdmi: Move clock calculation into its own function

[Maxime Ripard]

The code to compute our clock rate for a given setup will be called in
multiple places in the next patches, so let's create a separate function
for it.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 49 +++++++++++++++++++++++-----------
 1 file changed, 34 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 9952b13eeb6e..3d649fbc480a 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1275,6 +1275,35 @@ vc4_hdmi_encoder_clock_valid(struct vc4_hdmi *vc4_hdmi,
 	return MODE_OK;
 }
 
+static unsigned long
+vc4_hdmi_encoder_compute_mode_clock(const struct drm_display_mode *mode,
+				    unsigned int bpc)
+{
+	unsigned long clock = mode->crtc_clock * 1000;
+
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+		clock = clock * 2;
+
+	return clock * bpc / 8;
+}
+
+static int
+vc4_hdmi_encoder_compute_clock(struct vc4_hdmi *vc4_hdmi,
+			       struct vc4_hdmi_connector_state *vc4_state,
+			       const struct drm_display_mode *mode,
+			       unsigned int bpc)
+{
+	unsigned long clock;
+
+	clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc);
+	if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, clock) != MODE_OK)
+		return -EINVAL;
+
+	vc4_state->pixel_rate = clock;
+
+	return 0;
+}
+
 #define WIFI_2_4GHz_CH1_MIN_FREQ	2400000000ULL
 #define WIFI_2_4GHz_CH1_MAX_FREQ	2422000000ULL
 
@@ -1287,6 +1316,7 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 	unsigned long long pixel_rate = mode->clock * 1000;
 	unsigned long long tmds_rate;
+	int ret;
 
 	if (vc4_hdmi->variant->unsupported_odd_h_timings &&
 	    ((mode->hdisplay % 2) || (mode->hsync_start % 2) ||
@@ -1307,21 +1337,10 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
 		pixel_rate = mode->clock * 1000;
 	}
 
-	if (conn_state->max_bpc == 12) {
-		pixel_rate = pixel_rate * 150;
-		do_div(pixel_rate, 100);
-	} else if (conn_state->max_bpc == 10) {
-		pixel_rate = pixel_rate * 125;
-		do_div(pixel_rate, 100);
-	}
-
-	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
-		pixel_rate = pixel_rate * 2;
-
-	if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, pixel_rate) != MODE_OK)
-		return -EINVAL;
-
-	vc4_state->pixel_rate = pixel_rate;
+	ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi, vc4_state, mode,
+					     conn_state->max_bpc);
+	if (ret)
+		return ret;
 
 	return 0;
 }
-- 
2.33.1

[PATCH 10/11] drm/vc4: hdmi: Support HDMI YUV output

[Maxime Ripard]

In addition to the RGB444 output, the BCM2711 HDMI controller supports
the YUV444 and YUV422 output formats.

Let's add support for them in the driver, but still use RGB as the
preferred format.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c      | 133 +++++++++++++++++++++++++---
 drivers/gpu/drm/vc4/vc4_hdmi.h      |   8 ++
 drivers/gpu/drm/vc4/vc4_hdmi_regs.h |   6 ++
 drivers/gpu/drm/vc4/vc4_regs.h      |  16 ++++
 4 files changed, 153 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 3d649fbc480a..04eb1ab9dad3 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -329,6 +329,7 @@ static void vc4_hdmi_connector_reset(struct drm_connector *connector)
 
 	new_state->base.max_bpc = 8;
 	new_state->base.max_requested_bpc = 8;
+	new_state->output_format = VC4_HDMI_OUTPUT_RGB;
 	drm_atomic_helper_connector_tv_reset(connector);
 }
 
@@ -344,6 +345,7 @@ vc4_hdmi_connector_duplicate_state(struct drm_connector *connector)
 		return NULL;
 
 	new_state->pixel_rate = vc4_state->pixel_rate;
+	new_state->output_format = vc4_state->output_format;
 	__drm_atomic_helper_connector_duplicate_state(connector, &new_state->base);
 
 	return &new_state->base;
@@ -487,11 +489,32 @@ static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
 		DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
 }
 
+static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
+					      enum vc4_hdmi_output_format fmt)
+{
+	switch (fmt) {
+	case VC4_HDMI_OUTPUT_RGB:
+		fallthrough;
+	case VC4_HDMI_OUTPUT_YUV420:
+		fallthrough;
+	case VC4_HDMI_OUTPUT_YUV422:
+		fallthrough;
+	case VC4_HDMI_OUTPUT_YUV444:
+		frame->colorspace = fmt;
+		break;
+
+	default:
+		break;
+	}
+}
+
 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 {
 	struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
 	struct drm_connector *connector = &vc4_hdmi->connector;
 	struct drm_connector_state *cstate = connector->state;
+	struct vc4_hdmi_connector_state *vc4_state =
+		conn_state_to_vc4_hdmi_conn_state(cstate);
 	const struct drm_display_mode *mode = &vc4_hdmi->saved_adjusted_mode;
 	union hdmi_infoframe frame;
 	int ret;
@@ -511,6 +534,7 @@ static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
 					   HDMI_QUANTIZATION_RANGE_FULL :
 					   HDMI_QUANTIZATION_RANGE_LIMITED);
 	drm_hdmi_avi_infoframe_colorimetry(&frame.avi, cstate);
+	vc4_hdmi_avi_infoframe_colorspace(&frame.avi, vc4_state->output_format);
 	drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
 
 	vc4_hdmi_write_infoframe(encoder, &frame);
@@ -809,6 +833,38 @@ static const u16 vc5_hdmi_csc_full_rgb_to_limited_rgb[3][4] = {
 	{ 0x0000, 0x0000, 0x1b80, 0x0400 },
 };
 
+/*
+ * Conversion between Full Range RGB and Full Range YUV422 using the
+ * BT.709 Colorspace
+ *
+ * [  0.212639  0.715169  0.072192  0   ]
+ * [ -0.117208 -0.394207  0.511416  128 ]
+ * [  0.511416 -0.464524 -0.046891  128 ]
+ *
+ * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
+ */
+static const u16 vc5_hdmi_csc_full_rgb_to_full_yuv422_bt709[3][4] = {
+	{ 0x06ce, 0x16e3, 0x024f, 0x0000 },
+	{ 0xfc41, 0xf364, 0x105e, 0x2000 },
+	{ 0x105e, 0xf124, 0xfe81, 0x2000 },
+};
+
+/*
+ * Conversion between Full Range RGB and Full Range YUV444 using the
+ * BT.709 Colorspace
+ *
+ * [ -0.117208 -0.394207  0.511416  128 ]
+ * [  0.511416 -0.464524 -0.046891  128 ]
+ * [  0.212639  0.715169  0.072192  0   ]
+ *
+ * Matrix is signed 2p13 fixed point, with signed 9p6 offsets
+ */
+static const u16 vc5_hdmi_csc_full_rgb_to_full_yuv444_bt709[3][4] = {
+	{ 0xfc41, 0xf364, 0x105e, 0x2000 },
+	{ 0x105e, 0xf124, 0xfe81, 0x2000 },
+	{ 0x06ce, 0x16e3, 0x024f, 0x0000 },
+};
+
 static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
 				    const u16 coeffs[3][4])
 {
@@ -826,19 +882,53 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
 			       struct drm_connector_state *state,
 			       const struct drm_display_mode *mode)
 {
+	struct vc4_hdmi_connector_state *vc4_state =
+		conn_state_to_vc4_hdmi_conn_state(state);
 	unsigned long flags;
+	u32 if_cfg = 0;
+	u32 if_xbar = 0x543210;
+	u32 csc_chan_ctl = 0;
 	u32 csc_ctl = VC5_MT_CP_CSC_CTL_ENABLE | VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
 							       VC5_MT_CP_CSC_CTL_MODE);
 
 	spin_lock_irqsave(&vc4_hdmi->hw_lock, flags);
 
-	HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, 0x354021);
+	switch (vc4_state->output_format) {
+	case VC4_HDMI_OUTPUT_YUV444:
+		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_full_yuv444_bt709);
+		break;
 
-	if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode))
-		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_limited_rgb);
-	else
-		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_unity);
+	case VC4_HDMI_OUTPUT_YUV422:
+		csc_ctl |= VC4_SET_FIELD(VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422_STANDARD,
+					 VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422) |
+			VC5_MT_CP_CSC_CTL_USE_444_TO_422 |
+			VC5_MT_CP_CSC_CTL_USE_RNG_SUPPRESSION;
 
+		csc_chan_ctl |= VC4_SET_FIELD(VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP_LEGACY_STYLE,
+					      VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP);
+
+		if_cfg |= VC4_SET_FIELD(VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422_FORMAT_422_LEGACY,
+					VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422);
+
+		vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_full_yuv422_bt709);
+		break;
+
+	case VC4_HDMI_OUTPUT_RGB:
+		if_xbar = 0x354021;
+
+		if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode))
+			vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_limited_rgb);
+		else
+			vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_unity);
+		break;
+
+	default:
+		break;
+	}
+
+	HDMI_WRITE(HDMI_VEC_INTERFACE_CFG, if_cfg);
+	HDMI_WRITE(HDMI_VEC_INTERFACE_XBAR, if_xbar);
+	HDMI_WRITE(HDMI_CSC_CHANNEL_CTL, csc_chan_ctl);
 	HDMI_WRITE(HDMI_CSC_CTL, csc_ctl);
 
 	spin_unlock_irqrestore(&vc4_hdmi->hw_lock, flags);
@@ -1277,13 +1367,16 @@ vc4_hdmi_encoder_clock_valid(struct vc4_hdmi *vc4_hdmi,
 
 static unsigned long
 vc4_hdmi_encoder_compute_mode_clock(const struct drm_display_mode *mode,
-				    unsigned int bpc)
+				    unsigned int bpc, unsigned int fmt)
 {
 	unsigned long clock = mode->crtc_clock * 1000;
 
 	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
 		clock = clock * 2;
 
+	if (fmt == VC4_HDMI_OUTPUT_YUV422)
+		clock = clock * 2 / 3;
+
 	return clock * bpc / 8;
 }
 
@@ -1291,11 +1384,11 @@ static int
 vc4_hdmi_encoder_compute_clock(struct vc4_hdmi *vc4_hdmi,
 			       struct vc4_hdmi_connector_state *vc4_state,
 			       const struct drm_display_mode *mode,
-			       unsigned int bpc)
+			       unsigned int bpc, unsigned int fmt)
 {
 	unsigned long clock;
 
-	clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc);
+	clock = vc4_hdmi_encoder_compute_mode_clock(mode, bpc, fmt);
 	if (vc4_hdmi_encoder_clock_valid(vc4_hdmi, clock) != MODE_OK)
 		return -EINVAL;
 
@@ -1304,6 +1397,27 @@ vc4_hdmi_encoder_compute_clock(struct vc4_hdmi *vc4_hdmi,
 	return 0;
 }
 
+static int
+vc4_hdmi_encoder_compute_config(struct vc4_hdmi *vc4_hdmi,
+				struct vc4_hdmi_connector_state *vc4_state,
+				const struct drm_display_mode *mode)
+{
+	struct drm_connector_state *conn_state = &vc4_state->base;
+	unsigned int format;
+	int ret;
+
+	format = VC4_HDMI_OUTPUT_RGB;
+	ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi,
+					     vc4_state, mode,
+					     conn_state->max_bpc,
+					     format);
+	if (ret)
+		return ret;
+
+	vc4_state->output_format = format;
+	return ret;
+}
+
 #define WIFI_2_4GHz_CH1_MIN_FREQ	2400000000ULL
 #define WIFI_2_4GHz_CH1_MAX_FREQ	2422000000ULL
 
@@ -1337,8 +1451,7 @@ static int vc4_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
 		pixel_rate = mode->clock * 1000;
 	}
 
-	ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi, vc4_state, mode,
-					     conn_state->max_bpc);
+	ret = vc4_hdmi_encoder_compute_config(vc4_hdmi, vc4_state, mode);
 	if (ret)
 		return ret;
 
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h
index 2b6aaafc020a..92402915ec98 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -117,6 +117,13 @@ struct vc4_hdmi_audio {
 	bool streaming;
 };
 
+enum vc4_hdmi_output_format {
+	VC4_HDMI_OUTPUT_RGB,
+	VC4_HDMI_OUTPUT_YUV422,
+	VC4_HDMI_OUTPUT_YUV444,
+	VC4_HDMI_OUTPUT_YUV420,
+};
+
 /* General HDMI hardware state. */
 struct vc4_hdmi {
 	struct vc4_hdmi_audio audio;
@@ -235,6 +242,7 @@ encoder_to_vc4_hdmi(struct drm_encoder *encoder)
 struct vc4_hdmi_connector_state {
 	struct drm_connector_state	base;
 	unsigned long long		pixel_rate;
+	enum vc4_hdmi_output_format	output_format;
 };
 
 static inline struct vc4_hdmi_connector_state *
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
index fc971506bd4f..a040356b6bdc 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi_regs.h
@@ -54,6 +54,7 @@ enum vc4_hdmi_field {
 	HDMI_CSC_24_23,
 	HDMI_CSC_32_31,
 	HDMI_CSC_34_33,
+	HDMI_CSC_CHANNEL_CTL,
 	HDMI_CSC_CTL,
 
 	/*
@@ -119,6 +120,7 @@ enum vc4_hdmi_field {
 	HDMI_TX_PHY_POWERDOWN_CTL,
 	HDMI_TX_PHY_RESET_CTL,
 	HDMI_TX_PHY_TMDS_CLK_WORD_SEL,
+	HDMI_VEC_INTERFACE_CFG,
 	HDMI_VEC_INTERFACE_XBAR,
 	HDMI_VERTA0,
 	HDMI_VERTA1,
@@ -244,6 +246,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi0_fields[] = {
 	VC4_HDMI_REG(HDMI_SCRAMBLER_CTL, 0x1c4),
 
 	VC5_DVP_REG(HDMI_CLOCK_STOP, 0x0bc),
+	VC5_DVP_REG(HDMI_VEC_INTERFACE_CFG, 0x0ec),
 	VC5_DVP_REG(HDMI_VEC_INTERFACE_XBAR, 0x0f0),
 
 	VC5_PHY_REG(HDMI_TX_PHY_RESET_CTL, 0x000),
@@ -289,6 +292,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi0_fields[] = {
 	VC5_CSC_REG(HDMI_CSC_24_23, 0x010),
 	VC5_CSC_REG(HDMI_CSC_32_31, 0x014),
 	VC5_CSC_REG(HDMI_CSC_34_33, 0x018),
+	VC5_CSC_REG(HDMI_CSC_CHANNEL_CTL, 0x02c),
 };
 
 static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi1_fields[] = {
@@ -324,6 +328,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi1_fields[] = {
 	VC4_HDMI_REG(HDMI_SCRAMBLER_CTL, 0x1c4),
 
 	VC5_DVP_REG(HDMI_CLOCK_STOP, 0x0bc),
+	VC5_DVP_REG(HDMI_VEC_INTERFACE_CFG, 0x0ec),
 	VC5_DVP_REG(HDMI_VEC_INTERFACE_XBAR, 0x0f0),
 
 	VC5_PHY_REG(HDMI_TX_PHY_RESET_CTL, 0x000),
@@ -369,6 +374,7 @@ static const struct vc4_hdmi_register __maybe_unused vc5_hdmi_hdmi1_fields[] = {
 	VC5_CSC_REG(HDMI_CSC_24_23, 0x010),
 	VC5_CSC_REG(HDMI_CSC_32_31, 0x014),
 	VC5_CSC_REG(HDMI_CSC_34_33, 0x018),
+	VC5_CSC_REG(HDMI_CSC_CHANNEL_CTL, 0x02c),
 };
 
 static inline
diff --git a/drivers/gpu/drm/vc4/vc4_regs.h b/drivers/gpu/drm/vc4/vc4_regs.h
index 952f2aad0785..392b0be053f8 100644
--- a/drivers/gpu/drm/vc4/vc4_regs.h
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
@@ -774,11 +774,27 @@ enum {
 # define VC4_HD_CSC_CTL_RGB2YCC			BIT(1)
 # define VC4_HD_CSC_CTL_ENABLE			BIT(0)
 
+# define VC5_MT_CP_CSC_CTL_USE_444_TO_422	BIT(6)
+# define VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422_MASK \
+						VC4_MASK(5, 4)
+# define VC5_MT_CP_CSC_CTL_FILTER_MODE_444_TO_422_STANDARD \
+						3
+# define VC5_MT_CP_CSC_CTL_USE_RNG_SUPPRESSION	BIT(3)
 # define VC5_MT_CP_CSC_CTL_ENABLE		BIT(2)
 # define VC5_MT_CP_CSC_CTL_MODE_MASK		VC4_MASK(1, 0)
 
+# define VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP_MASK \
+						VC4_MASK(7, 6)
+# define VC5_MT_CP_CHANNEL_CTL_OUTPUT_REMAP_LEGACY_STYLE \
+						2
+
 # define VC4_DVP_HT_CLOCK_STOP_PIXEL		BIT(1)
 
+# define VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422_MASK \
+						VC4_MASK(3, 2)
+# define VC5_DVP_HT_VEC_INTERFACE_CFG_SEL_422_FORMAT_422_LEGACY \
+						2
+
 /* HVS display list information. */
 #define HVS_BOOTLOADER_DLIST_END                32
 
-- 
2.33.1

Re: [PATCH 10/11] drm/vc4: hdmi: Support HDMI YUV output

[kernel test robot]

Hi Maxime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on next-20211203]
[cannot apply to drm-intel/for-linux-next anholt/for-next v5.16-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: nds32-allyesconfig (https://download.01.org/0day-ci/archive/20211203/202112032036.vcxJzxkG-lkp@intel.com/config)
compiler: nds32le-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/70ee339decc66c157b6c9c983e8cce172c323218
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
        git checkout 70ee339decc66c157b6c9c983e8cce172c323218
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash drivers/gpu/drm/vc4/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/vc4/vc4_hdmi.c: In function 'vc4_hdmi_avi_infoframe_colorspace':
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:35: warning: implicit conversion from 'enum vc4_hdmi_output_format' to 'enum hdmi_colorspace' [-Wenum-conversion]
     503 |                 frame->colorspace = fmt;
         |                                   ^


vim +503 drivers/gpu/drm/vc4/vc4_hdmi.c

   491	
   492	static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
   493						      enum vc4_hdmi_output_format fmt)
   494	{
   495		switch (fmt) {
   496		case VC4_HDMI_OUTPUT_RGB:
   497			fallthrough;
   498		case VC4_HDMI_OUTPUT_YUV420:
   499			fallthrough;
   500		case VC4_HDMI_OUTPUT_YUV422:
   501			fallthrough;
   502		case VC4_HDMI_OUTPUT_YUV444:
 > 503			frame->colorspace = fmt;
   504			break;
   505	
   506		default:
   507			break;
   508		}
   509	}
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Re: [PATCH 10/11] drm/vc4: hdmi: Support HDMI YUV output

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2694 bytes --]

Hi Maxime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on next-20211203]
[cannot apply to drm-intel/for-linux-next anholt/for-next v5.16-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: nds32-allyesconfig (https://download.01.org/0day-ci/archive/20211203/202112032036.vcxJzxkG-lkp(a)intel.com/config)
compiler: nds32le-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/70ee339decc66c157b6c9c983e8cce172c323218
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
        git checkout 70ee339decc66c157b6c9c983e8cce172c323218
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash drivers/gpu/drm/vc4/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/vc4/vc4_hdmi.c: In function 'vc4_hdmi_avi_infoframe_colorspace':
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:35: warning: implicit conversion from 'enum vc4_hdmi_output_format' to 'enum hdmi_colorspace' [-Wenum-conversion]
     503 |                 frame->colorspace = fmt;
         |                                   ^


vim +503 drivers/gpu/drm/vc4/vc4_hdmi.c

   491	
   492	static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
   493						      enum vc4_hdmi_output_format fmt)
   494	{
   495		switch (fmt) {
   496		case VC4_HDMI_OUTPUT_RGB:
   497			fallthrough;
   498		case VC4_HDMI_OUTPUT_YUV420:
   499			fallthrough;
   500		case VC4_HDMI_OUTPUT_YUV422:
   501			fallthrough;
   502		case VC4_HDMI_OUTPUT_YUV444:
 > 503			frame->colorspace = fmt;
   504			break;
   505	
   506		default:
   507			break;
   508		}
   509	}
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

Re: [PATCH 10/11] drm/vc4: hdmi: Support HDMI YUV output

[kernel test robot]

Hi Maxime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on next-20211203]
[cannot apply to drm-intel/for-linux-next anholt/for-next v5.16-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: powerpc-randconfig-s031-20211203 (https://download.01.org/0day-ci/archive/20211204/202112040851.zYD2J0lK-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/70ee339decc66c157b6c9c983e8cce172c323218
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
        git checkout 70ee339decc66c157b6c9c983e8cce172c323218
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/gpu/drm/vc4/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse: sparse: mixing different enum types:
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse:    unsigned int enum vc4_hdmi_output_format
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse:    unsigned int enum hdmi_colorspace

vim +503 drivers/gpu/drm/vc4/vc4_hdmi.c

   491	
   492	static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
   493						      enum vc4_hdmi_output_format fmt)
   494	{
   495		switch (fmt) {
   496		case VC4_HDMI_OUTPUT_RGB:
   497			fallthrough;
   498		case VC4_HDMI_OUTPUT_YUV420:
   499			fallthrough;
   500		case VC4_HDMI_OUTPUT_YUV422:
   501			fallthrough;
   502		case VC4_HDMI_OUTPUT_YUV444:
 > 503			frame->colorspace = fmt;
   504			break;
   505	
   506		default:
   507			break;
   508		}
   509	}
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

Re: [PATCH 10/11] drm/vc4: hdmi: Support HDMI YUV output

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2743 bytes --]

Hi Maxime,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on next-20211203]
[cannot apply to drm-intel/for-linux-next anholt/for-next v5.16-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: powerpc-randconfig-s031-20211203 (https://download.01.org/0day-ci/archive/20211204/202112040851.zYD2J0lK-lkp(a)intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://github.com/0day-ci/linux/commit/70ee339decc66c157b6c9c983e8cce172c323218
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Maxime-Ripard/drm-vc4-hdmi-Yet-Another-Approach-to-HDMI-YUV-output/20211203-185623
        git checkout 70ee339decc66c157b6c9c983e8cce172c323218
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/gpu/drm/vc4/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse: sparse: mixing different enum types:
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse:    unsigned int enum vc4_hdmi_output_format
>> drivers/gpu/drm/vc4/vc4_hdmi.c:503:37: sparse:    unsigned int enum hdmi_colorspace

vim +503 drivers/gpu/drm/vc4/vc4_hdmi.c

   491	
   492	static void vc4_hdmi_avi_infoframe_colorspace(struct hdmi_avi_infoframe *frame,
   493						      enum vc4_hdmi_output_format fmt)
   494	{
   495		switch (fmt) {
   496		case VC4_HDMI_OUTPUT_RGB:
   497			fallthrough;
   498		case VC4_HDMI_OUTPUT_YUV420:
   499			fallthrough;
   500		case VC4_HDMI_OUTPUT_YUV422:
   501			fallthrough;
   502		case VC4_HDMI_OUTPUT_YUV444:
 > 503			frame->colorspace = fmt;
   504			break;
   505	
   506		default:
   507			break;
   508		}
   509	}
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

[PATCH 11/11] drm/vc4: hdmi: Force YUV422 if the rate is too high

[Maxime Ripard]

When using the modes that need the highest pixel rate we support (such
as 4k at 60Hz), using a 10 or 12 bpc output will put us over the limit
of what we can achieve.

In such a case, let's force our output to be YUV422 so that we can go
back down under the required clock rate.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 04eb1ab9dad3..5b8b2688a3f4 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1411,8 +1411,15 @@ vc4_hdmi_encoder_compute_config(struct vc4_hdmi *vc4_hdmi,
 					     vc4_state, mode,
 					     conn_state->max_bpc,
 					     format);
-	if (ret)
-		return ret;
+	if (ret) {
+		format = VC4_HDMI_OUTPUT_YUV422;
+		ret = vc4_hdmi_encoder_compute_clock(vc4_hdmi,
+						     vc4_state, mode,
+						     conn_state->max_bpc,
+						     format);
+		if (ret)
+			return ret;
+	}
 
 	vc4_state->output_format = format;
 	return ret;
-- 
2.33.1