[PATCH v2, 0/2] drm/mediatek: Add ctm property support

[PATCH v2, 0/2] drm/mediatek: Add ctm property support

[Yongqiang Niu]

Changes since v1:
-separate gamma patch
-remove cmdq support for ctm setting


Yongqiang Niu (2):
  drm/mediatek: Fix gamma correction issue
  drm/mediatek: Add ctm property support

 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 18 +++++++--
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
 3 files changed, 85 insertions(+), 4 deletions(-)

-- 
1.8.1.1.dirty

[PATCH v2, 1/2] drm/mediatek: Fix gamma correction issue

[Yongqiang Niu]

if there is no gamma function in the crtc
display path, don't add gamma property
for crtc

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index ca4fc47..9a8e1d4 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -734,6 +734,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	int pipe = priv->num_pipes;
 	int ret;
 	int i;
+	uint gamma_lut_size = 0;
 
 	if (!path)
 		return 0;
@@ -785,6 +786,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 		}
 
 		mtk_crtc->ddp_comp[i] = comp;
+
+		if (comp->funcs->gamma_set)
+			gamma_lut_size = MTK_LUT_SIZE;
 	}
 
 	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
@@ -805,8 +809,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 				NULL, pipe);
 	if (ret < 0)
 		return ret;
-	drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
-	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
+
+	if (gamma_lut_size)
+		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
+	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
 	priv->num_pipes++;
 	mutex_init(&mtk_crtc->hw_lock);
 
-- 
1.8.1.1.dirty

[PATCH v2, 2/2] drm/mediatek: Add ctm property support

[Yongqiang Niu]

Add ctm property support

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 10 ++++-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
 3 files changed, 78 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 9a8e1d4..db3031e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -614,8 +614,10 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 	if (mtk_crtc->event)
 		mtk_crtc->pending_needs_vblank = true;
 	if (crtc->state->color_mgmt_changed)
-		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
 			mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
+			mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
+		}
 	mtk_drm_crtc_hw_config(mtk_crtc);
 }
 
@@ -734,6 +736,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 	int pipe = priv->num_pipes;
 	int ret;
 	int i;
+	bool has_ctm = false;
 	uint gamma_lut_size = 0;
 
 	if (!path)
@@ -787,6 +790,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 
 		mtk_crtc->ddp_comp[i] = comp;
 
+		if (comp->funcs->ctm_set)
+			has_ctm = true;
+
 		if (comp->funcs->gamma_set)
 			gamma_lut_size = MTK_LUT_SIZE;
 	}
@@ -812,7 +818,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 
 	if (gamma_lut_size)
 		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
-	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
+	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
 	priv->num_pipes++;
 	mutex_init(&mtk_crtc->hw_lock);
 
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index cb3296f..182990a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -37,7 +37,15 @@
 #define CCORR_EN				BIT(0)
 #define DISP_CCORR_CFG				0x0020
 #define CCORR_RELAY_MODE			BIT(0)
+#define CCORR_ENGINE_EN				BIT(1)
+#define CCORR_GAMMA_OFF				BIT(2)
+#define CCORR_WGAMUT_SRC_CLIP			BIT(3)
 #define DISP_CCORR_SIZE				0x0030
+#define DISP_CCORR_COEF_0			0x0080
+#define DISP_CCORR_COEF_1			0x0084
+#define DISP_CCORR_COEF_2			0x0088
+#define DISP_CCORR_COEF_3			0x008C
+#define DISP_CCORR_COEF_4			0x0090
 
 #define DISP_DITHER_EN				0x0000
 #define DITHER_EN				BIT(0)
@@ -188,7 +196,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
 			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
 {
 	mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
-	mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
+	mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
 }
 
 static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
@@ -201,6 +209,57 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
 	writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
 }
 
+/* Converts a DRM S31.32 value to the HW S1.10 format. */
+static u16 mtk_ctm_s31_32_to_s1_10(u64 in)
+{
+	u16 r;
+
+	/* Sign bit. */
+	r = in & BIT_ULL(63) ? BIT(11) : 0;
+
+	if ((in & GENMASK_ULL(62, 33)) > 0) {
+		/* identity value 0x100000000 -> 0x400, */
+		/* if bigger this, set it to max 0x7ff. */
+		r |= GENMASK(10, 0);
+	} else {
+		/* take the 11 most important bits. */
+		r |= (in >> 22) & GENMASK(10, 0);
+	}
+
+	return r;
+}
+
+static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
+			      struct drm_crtc_state *state)
+{
+	struct drm_property_blob *blob = state->ctm;
+	struct drm_color_ctm *ctm;
+	const u64 *input;
+	uint16_t coeffs[9] = { 0 };
+	int i;
+	struct cmdq_pkt *cmdq_pkt = NULL;
+
+	if (!blob)
+		return;
+
+	ctm = (struct drm_color_ctm *)blob->data;
+	input = ctm->matrix;
+
+	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
+		coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
+
+	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
+		      comp, DISP_CCORR_COEF_0);
+	mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
+		      comp, DISP_CCORR_COEF_1);
+	mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
+		      comp, DISP_CCORR_COEF_2);
+	mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
+		      comp, DISP_CCORR_COEF_3);
+	mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
+		      comp, DISP_CCORR_COEF_4);
+}
+
 static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
 			      unsigned int h, unsigned int vrefresh,
 			      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
@@ -271,6 +330,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
 	.config = mtk_ccorr_config,
 	.start = mtk_ccorr_start,
 	.stop = mtk_ccorr_stop,
+	.ctm_set = mtk_ccorr_ctm_set,
 };
 
 static const struct mtk_ddp_comp_funcs ddp_dither = {
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index 384abae..20fe55d 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -92,6 +92,8 @@ struct mtk_ddp_comp_funcs {
 			  struct drm_crtc_state *state);
 	void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
 	void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
+	void (*ctm_set)(struct mtk_ddp_comp *comp,
+			struct drm_crtc_state *state);
 };
 
 struct mtk_ddp_comp {
@@ -205,6 +207,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
 		comp->funcs->bgclr_in_off(comp);
 }
 
+static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
+				   struct drm_crtc_state *state)
+{
+	if (comp->funcs && comp->funcs->ctm_set)
+		comp->funcs->ctm_set(comp, state);
+}
+
 int mtk_ddp_comp_get_id(struct device_node *node,
 			enum mtk_ddp_comp_type comp_type);
 int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
-- 
1.8.1.1.dirty

Re: [PATCH v2, 1/2] drm/mediatek: Fix gamma correction issue

[CK Hu]

Hi, Yongqiang:

The title is too rough. Any bug of gamma would be this title. I would
like the title show explicitly what it does.

On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> if there is no gamma function in the crtc
> display path, don't add gamma property
> for crtc
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index ca4fc47..9a8e1d4 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -734,6 +734,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  	int pipe = priv->num_pipes;
>  	int ret;
>  	int i;
> +	uint gamma_lut_size = 0;
>  
>  	if (!path)
>  		return 0;
> @@ -785,6 +786,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  		}
>  
>  		mtk_crtc->ddp_comp[i] = comp;
> +
> +		if (comp->funcs->gamma_set)
> +			gamma_lut_size = MTK_LUT_SIZE;
>  	}
>  
>  	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> @@ -805,8 +809,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  				NULL, pipe);
>  	if (ret < 0)
>  		return ret;
> -	drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
> -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
> +
> +	if (gamma_lut_size)
> +		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);

If there is no gamma, shall we enable color management?

Regards,
CK

>  	priv->num_pipes++;
>  	mutex_init(&mtk_crtc->hw_lock);
>  

Re: [PATCH v2, 0/2] drm/mediatek: Add ctm property support

[CK Hu]

Hi, Yongqiang:

On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> Changes since v1:
> -separate gamma patch
> -remove cmdq support for ctm setting

If this series depend on other patch or series, please describe it.

Regards,
CK

> 
> 
> Yongqiang Niu (2):
>   drm/mediatek: Fix gamma correction issue
>   drm/mediatek: Add ctm property support
> 
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 18 +++++++--
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
>  3 files changed, 85 insertions(+), 4 deletions(-)
> 

Re: [PATCH v2, 2/2] drm/mediatek: Add ctm property support

[CK Hu]

On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> Add ctm property support
> 
> Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 10 ++++-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
>  3 files changed, 78 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> index 9a8e1d4..db3031e 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> @@ -614,8 +614,10 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
>  	if (mtk_crtc->event)
>  		mtk_crtc->pending_needs_vblank = true;
>  	if (crtc->state->color_mgmt_changed)
> -		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> +		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
>  			mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
> +			mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
> +		}
>  	mtk_drm_crtc_hw_config(mtk_crtc);
>  }
>  
> @@ -734,6 +736,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  	int pipe = priv->num_pipes;
>  	int ret;
>  	int i;
> +	bool has_ctm = false;
>  	uint gamma_lut_size = 0;
>  
>  	if (!path)
> @@ -787,6 +790,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  
>  		mtk_crtc->ddp_comp[i] = comp;
>  
> +		if (comp->funcs->ctm_set)
> +			has_ctm = true;
> +
>  		if (comp->funcs->gamma_set)
>  			gamma_lut_size = MTK_LUT_SIZE;
>  	}
> @@ -812,7 +818,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
>  
>  	if (gamma_lut_size)
>  		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
> +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);

May enable color management when has gamma or ctm.

Regards,
CK

>  	priv->num_pipes++;
>  	mutex_init(&mtk_crtc->hw_lock);
>  
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> index cb3296f..182990a 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> @@ -37,7 +37,15 @@
>  #define CCORR_EN				BIT(0)
>  #define DISP_CCORR_CFG				0x0020
>  #define CCORR_RELAY_MODE			BIT(0)
> +#define CCORR_ENGINE_EN				BIT(1)
> +#define CCORR_GAMMA_OFF				BIT(2)
> +#define CCORR_WGAMUT_SRC_CLIP			BIT(3)
>  #define DISP_CCORR_SIZE				0x0030
> +#define DISP_CCORR_COEF_0			0x0080
> +#define DISP_CCORR_COEF_1			0x0084
> +#define DISP_CCORR_COEF_2			0x0088
> +#define DISP_CCORR_COEF_3			0x008C
> +#define DISP_CCORR_COEF_4			0x0090
>  
>  #define DISP_DITHER_EN				0x0000
>  #define DITHER_EN				BIT(0)
> @@ -188,7 +196,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
>  			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
>  {
>  	mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
> -	mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
> +	mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
>  }
>  
>  static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
> @@ -201,6 +209,57 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
>  	writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
>  }
>  
> +/* Converts a DRM S31.32 value to the HW S1.10 format. */
> +static u16 mtk_ctm_s31_32_to_s1_10(u64 in)
> +{
> +	u16 r;
> +
> +	/* Sign bit. */
> +	r = in & BIT_ULL(63) ? BIT(11) : 0;
> +
> +	if ((in & GENMASK_ULL(62, 33)) > 0) {
> +		/* identity value 0x100000000 -> 0x400, */
> +		/* if bigger this, set it to max 0x7ff. */
> +		r |= GENMASK(10, 0);
> +	} else {
> +		/* take the 11 most important bits. */
> +		r |= (in >> 22) & GENMASK(10, 0);
> +	}
> +
> +	return r;
> +}
> +
> +static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
> +			      struct drm_crtc_state *state)
> +{
> +	struct drm_property_blob *blob = state->ctm;
> +	struct drm_color_ctm *ctm;
> +	const u64 *input;
> +	uint16_t coeffs[9] = { 0 };
> +	int i;
> +	struct cmdq_pkt *cmdq_pkt = NULL;
> +
> +	if (!blob)
> +		return;
> +
> +	ctm = (struct drm_color_ctm *)blob->data;
> +	input = ctm->matrix;
> +
> +	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
> +		coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
> +
> +	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
> +		      comp, DISP_CCORR_COEF_0);
> +	mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
> +		      comp, DISP_CCORR_COEF_1);
> +	mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
> +		      comp, DISP_CCORR_COEF_2);
> +	mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
> +		      comp, DISP_CCORR_COEF_3);
> +	mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
> +		      comp, DISP_CCORR_COEF_4);
> +}
> +
>  static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
>  			      unsigned int h, unsigned int vrefresh,
>  			      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> @@ -271,6 +330,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
>  	.config = mtk_ccorr_config,
>  	.start = mtk_ccorr_start,
>  	.stop = mtk_ccorr_stop,
> +	.ctm_set = mtk_ccorr_ctm_set,
>  };
>  
>  static const struct mtk_ddp_comp_funcs ddp_dither = {
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> index 384abae..20fe55d 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> @@ -92,6 +92,8 @@ struct mtk_ddp_comp_funcs {
>  			  struct drm_crtc_state *state);
>  	void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
>  	void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
> +	void (*ctm_set)(struct mtk_ddp_comp *comp,
> +			struct drm_crtc_state *state);
>  };
>  
>  struct mtk_ddp_comp {
> @@ -205,6 +207,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
>  		comp->funcs->bgclr_in_off(comp);
>  }
>  
> +static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
> +				   struct drm_crtc_state *state)
> +{
> +	if (comp->funcs && comp->funcs->ctm_set)
> +		comp->funcs->ctm_set(comp, state);
> +}
> +
>  int mtk_ddp_comp_get_id(struct device_node *node,
>  			enum mtk_ddp_comp_type comp_type);
>  int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,

Re: [PATCH v2, 1/2] drm/mediatek: Fix gamma correction issue

[Yongqiang Niu]

On Fri, 2019-12-13 at 15:48 +0800, CK Hu wrote:
> Hi, Yongqiang:
> 
> The title is too rough. Any bug of gamma would be this title. I would
> like the title show explicitly what it does.
> 
> On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> > if there is no gamma function in the crtc
> > display path, don't add gamma property
> > for crtc
> > 
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++++--
> >  1 file changed, 8 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > index ca4fc47..9a8e1d4 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > @@ -734,6 +734,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  	int pipe = priv->num_pipes;
> >  	int ret;
> >  	int i;
> > +	uint gamma_lut_size = 0;
> >  
> >  	if (!path)
> >  		return 0;
> > @@ -785,6 +786,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  		}
> >  
> >  		mtk_crtc->ddp_comp[i] = comp;
> > +
> > +		if (comp->funcs->gamma_set)
> > +			gamma_lut_size = MTK_LUT_SIZE;
> >  	}
> >  
> >  	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> > @@ -805,8 +809,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  				NULL, pipe);
> >  	if (ret < 0)
> >  		return ret;
> > -	drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
> > -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
> > +
> > +	if (gamma_lut_size)
> > +		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> > +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
> 
> If there is no gamma, shall we enable color management?
> 
> Regards,
> CK

drm_crtc_enable_color_mgmt will check the gamma_lut_size parameter,
if no gamma, gamma_lut_size will be 0, and gamma_lut_size will not attch
gamma property for the crtc
> 
> >  	priv->num_pipes++;
> >  	mutex_init(&mtk_crtc->hw_lock);
> >  
> 
> 

Re: [PATCH v2, 1/2] drm/mediatek: Fix gamma correction issue

[CK Hu]

Hi, Yongqiang:

On Fri, 2019-12-13 at 16:03 +0800, Yongqiang Niu wrote:
> On Fri, 2019-12-13 at 15:48 +0800, CK Hu wrote:
> > Hi, Yongqiang:
> > 
> > The title is too rough. Any bug of gamma would be this title. I would
> > like the title show explicitly what it does.
> > 
> > On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> > > if there is no gamma function in the crtc
> > > display path, don't add gamma property
> > > for crtc
> > > 
> > > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > > ---
> > >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 10 ++++++++--
> > >  1 file changed, 8 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > index ca4fc47..9a8e1d4 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > @@ -734,6 +734,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  	int pipe = priv->num_pipes;
> > >  	int ret;
> > >  	int i;
> > > +	uint gamma_lut_size = 0;
> > >  
> > >  	if (!path)
> > >  		return 0;
> > > @@ -785,6 +786,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  		}
> > >  
> > >  		mtk_crtc->ddp_comp[i] = comp;
> > > +
> > > +		if (comp->funcs->gamma_set)
> > > +			gamma_lut_size = MTK_LUT_SIZE;
> > >  	}
> > >  
> > >  	for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> > > @@ -805,8 +809,10 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  				NULL, pipe);
> > >  	if (ret < 0)
> > >  		return ret;
> > > -	drm_mode_crtc_set_gamma_size(&mtk_crtc->base, MTK_LUT_SIZE);
> > > -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, MTK_LUT_SIZE);
> > > +
> > > +	if (gamma_lut_size)
> > > +		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> > > +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
> > 
> > If there is no gamma, shall we enable color management?
> > 
> > Regards,
> > CK
> 
> drm_crtc_enable_color_mgmt will check the gamma_lut_size parameter,
> if no gamma, gamma_lut_size will be 0, and gamma_lut_size will not attch
> gamma property for the crtc

OK, you're right. So

Reviewed-by: CK Hu <ck.hu@mediatek.com>

and what title would you like?
I could modify it when I apply this patch.

Regards,
CK

> > 
> > >  	priv->num_pipes++;
> > >  	mutex_init(&mtk_crtc->hw_lock);
> > >  
> > 
> > 
> 
> 

Re: [PATCH v2, 2/2] drm/mediatek: Add ctm property support

[Yongqiang Niu]

On Fri, 2019-12-13 at 15:57 +0800, CK Hu wrote:
> On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> > Add ctm property support
> > 
> > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 10 ++++-
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
> >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
> >  3 files changed, 78 insertions(+), 3 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > index 9a8e1d4..db3031e 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > @@ -614,8 +614,10 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
> >  	if (mtk_crtc->event)
> >  		mtk_crtc->pending_needs_vblank = true;
> >  	if (crtc->state->color_mgmt_changed)
> > -		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> > +		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
> >  			mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
> > +			mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
> > +		}
> >  	mtk_drm_crtc_hw_config(mtk_crtc);
> >  }
> >  
> > @@ -734,6 +736,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  	int pipe = priv->num_pipes;
> >  	int ret;
> >  	int i;
> > +	bool has_ctm = false;
> >  	uint gamma_lut_size = 0;
> >  
> >  	if (!path)
> > @@ -787,6 +790,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  
> >  		mtk_crtc->ddp_comp[i] = comp;
> >  
> > +		if (comp->funcs->ctm_set)
> > +			has_ctm = true;
> > +
> >  		if (comp->funcs->gamma_set)
> >  			gamma_lut_size = MTK_LUT_SIZE;
> >  	}
> > @@ -812,7 +818,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> >  
> >  	if (gamma_lut_size)
> >  		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> > -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
> > +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
> 
> May enable color management when has gamma or ctm.
> 
> Regards,
> CK
> 
drm_crtc_enable_color_mgmt will check the parameter validation.
if has_ctm is false, will not attach ctm property.
if gamma_lut_size is zero, will not attach gamma property.


> >  	priv->num_pipes++;
> >  	mutex_init(&mtk_crtc->hw_lock);
> >  
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > index cb3296f..182990a 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > @@ -37,7 +37,15 @@
> >  #define CCORR_EN				BIT(0)
> >  #define DISP_CCORR_CFG				0x0020
> >  #define CCORR_RELAY_MODE			BIT(0)
> > +#define CCORR_ENGINE_EN				BIT(1)
> > +#define CCORR_GAMMA_OFF				BIT(2)
> > +#define CCORR_WGAMUT_SRC_CLIP			BIT(3)
> >  #define DISP_CCORR_SIZE				0x0030
> > +#define DISP_CCORR_COEF_0			0x0080
> > +#define DISP_CCORR_COEF_1			0x0084
> > +#define DISP_CCORR_COEF_2			0x0088
> > +#define DISP_CCORR_COEF_3			0x008C
> > +#define DISP_CCORR_COEF_4			0x0090
> >  
> >  #define DISP_DITHER_EN				0x0000
> >  #define DITHER_EN				BIT(0)
> > @@ -188,7 +196,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
> >  			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> >  {
> >  	mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
> > -	mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
> > +	mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
> >  }
> >  
> >  static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
> > @@ -201,6 +209,57 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
> >  	writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
> >  }
> >  
> > +/* Converts a DRM S31.32 value to the HW S1.10 format. */
> > +static u16 mtk_ctm_s31_32_to_s1_10(u64 in)
> > +{
> > +	u16 r;
> > +
> > +	/* Sign bit. */
> > +	r = in & BIT_ULL(63) ? BIT(11) : 0;
> > +
> > +	if ((in & GENMASK_ULL(62, 33)) > 0) {
> > +		/* identity value 0x100000000 -> 0x400, */
> > +		/* if bigger this, set it to max 0x7ff. */
> > +		r |= GENMASK(10, 0);
> > +	} else {
> > +		/* take the 11 most important bits. */
> > +		r |= (in >> 22) & GENMASK(10, 0);
> > +	}
> > +
> > +	return r;
> > +}
> > +
> > +static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
> > +			      struct drm_crtc_state *state)
> > +{
> > +	struct drm_property_blob *blob = state->ctm;
> > +	struct drm_color_ctm *ctm;
> > +	const u64 *input;
> > +	uint16_t coeffs[9] = { 0 };
> > +	int i;
> > +	struct cmdq_pkt *cmdq_pkt = NULL;
> > +
> > +	if (!blob)
> > +		return;
> > +
> > +	ctm = (struct drm_color_ctm *)blob->data;
> > +	input = ctm->matrix;
> > +
> > +	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
> > +		coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
> > +
> > +	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
> > +		      comp, DISP_CCORR_COEF_0);
> > +	mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
> > +		      comp, DISP_CCORR_COEF_1);
> > +	mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
> > +		      comp, DISP_CCORR_COEF_2);
> > +	mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
> > +		      comp, DISP_CCORR_COEF_3);
> > +	mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
> > +		      comp, DISP_CCORR_COEF_4);
> > +}
> > +
> >  static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
> >  			      unsigned int h, unsigned int vrefresh,
> >  			      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > @@ -271,6 +330,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
> >  	.config = mtk_ccorr_config,
> >  	.start = mtk_ccorr_start,
> >  	.stop = mtk_ccorr_stop,
> > +	.ctm_set = mtk_ccorr_ctm_set,
> >  };
> >  
> >  static const struct mtk_ddp_comp_funcs ddp_dither = {
> > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > index 384abae..20fe55d 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > @@ -92,6 +92,8 @@ struct mtk_ddp_comp_funcs {
> >  			  struct drm_crtc_state *state);
> >  	void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
> >  	void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
> > +	void (*ctm_set)(struct mtk_ddp_comp *comp,
> > +			struct drm_crtc_state *state);
> >  };
> >  
> >  struct mtk_ddp_comp {
> > @@ -205,6 +207,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
> >  		comp->funcs->bgclr_in_off(comp);
> >  }
> >  
> > +static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
> > +				   struct drm_crtc_state *state)
> > +{
> > +	if (comp->funcs && comp->funcs->ctm_set)
> > +		comp->funcs->ctm_set(comp, state);
> > +}
> > +
> >  int mtk_ddp_comp_get_id(struct device_node *node,
> >  			enum mtk_ddp_comp_type comp_type);
> >  int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
> 
> 

Re: [PATCH v2, 2/2] drm/mediatek: Add ctm property support

[CK Hu]

Hi, Yongqiang:

On Fri, 2019-12-13 at 16:11 +0800, Yongqiang Niu wrote:
> On Fri, 2019-12-13 at 15:57 +0800, CK Hu wrote:
> > On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> > > Add ctm property support
> > > 
> > > Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
> > > ---
> > >  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 10 ++++-
> > >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
> > >  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
> > >  3 files changed, 78 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > index 9a8e1d4..db3031e 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
> > > @@ -614,8 +614,10 @@ static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
> > >  	if (mtk_crtc->event)
> > >  		mtk_crtc->pending_needs_vblank = true;
> > >  	if (crtc->state->color_mgmt_changed)
> > > -		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
> > > +		for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
> > >  			mtk_ddp_gamma_set(mtk_crtc->ddp_comp[i], crtc->state);
> > > +			mtk_ddp_ctm_set(mtk_crtc->ddp_comp[i], crtc->state);
> > > +		}
> > >  	mtk_drm_crtc_hw_config(mtk_crtc);
> > >  }
> > >  
> > > @@ -734,6 +736,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  	int pipe = priv->num_pipes;
> > >  	int ret;
> > >  	int i;
> > > +	bool has_ctm = false;
> > >  	uint gamma_lut_size = 0;
> > >  
> > >  	if (!path)
> > > @@ -787,6 +790,9 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  
> > >  		mtk_crtc->ddp_comp[i] = comp;
> > >  
> > > +		if (comp->funcs->ctm_set)
> > > +			has_ctm = true;
> > > +
> > >  		if (comp->funcs->gamma_set)
> > >  			gamma_lut_size = MTK_LUT_SIZE;
> > >  	}
> > > @@ -812,7 +818,7 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
> > >  
> > >  	if (gamma_lut_size)
> > >  		drm_mode_crtc_set_gamma_size(&mtk_crtc->base, gamma_lut_size);
> > > -	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, false, gamma_lut_size);
> > > +	drm_crtc_enable_color_mgmt(&mtk_crtc->base, 0, has_ctm, gamma_lut_size);
> > 
> > May enable color management when has gamma or ctm.
> > 
> > Regards,
> > CK
> > 
> drm_crtc_enable_color_mgmt will check the parameter validation.
> if has_ctm is false, will not attach ctm property.
> if gamma_lut_size is zero, will not attach gamma property.

You're right. So

Reviewed-by: CK Hu <ck.hu@mediatek.com>

> 
> 
> > >  	priv->num_pipes++;
> > >  	mutex_init(&mtk_crtc->hw_lock);
> > >  
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > index cb3296f..182990a 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
> > > @@ -37,7 +37,15 @@
> > >  #define CCORR_EN				BIT(0)
> > >  #define DISP_CCORR_CFG				0x0020
> > >  #define CCORR_RELAY_MODE			BIT(0)
> > > +#define CCORR_ENGINE_EN				BIT(1)
> > > +#define CCORR_GAMMA_OFF				BIT(2)
> > > +#define CCORR_WGAMUT_SRC_CLIP			BIT(3)
> > >  #define DISP_CCORR_SIZE				0x0030
> > > +#define DISP_CCORR_COEF_0			0x0080
> > > +#define DISP_CCORR_COEF_1			0x0084
> > > +#define DISP_CCORR_COEF_2			0x0088
> > > +#define DISP_CCORR_COEF_3			0x008C
> > > +#define DISP_CCORR_COEF_4			0x0090
> > >  
> > >  #define DISP_DITHER_EN				0x0000
> > >  #define DITHER_EN				BIT(0)
> > > @@ -188,7 +196,7 @@ static void mtk_ccorr_config(struct mtk_ddp_comp *comp, unsigned int w,
> > >  			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > >  {
> > >  	mtk_ddp_write(cmdq_pkt, h << 16 | w, comp, DISP_CCORR_SIZE);
> > > -	mtk_ddp_write(cmdq_pkt, CCORR_RELAY_MODE, comp, DISP_CCORR_CFG);
> > > +	mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, comp, DISP_CCORR_CFG);
> > >  }
> > >  
> > >  static void mtk_ccorr_start(struct mtk_ddp_comp *comp)
> > > @@ -201,6 +209,57 @@ static void mtk_ccorr_stop(struct mtk_ddp_comp *comp)
> > >  	writel_relaxed(0x0, comp->regs + DISP_CCORR_EN);
> > >  }
> > >  
> > > +/* Converts a DRM S31.32 value to the HW S1.10 format. */
> > > +static u16 mtk_ctm_s31_32_to_s1_10(u64 in)
> > > +{
> > > +	u16 r;
> > > +
> > > +	/* Sign bit. */
> > > +	r = in & BIT_ULL(63) ? BIT(11) : 0;
> > > +
> > > +	if ((in & GENMASK_ULL(62, 33)) > 0) {
> > > +		/* identity value 0x100000000 -> 0x400, */
> > > +		/* if bigger this, set it to max 0x7ff. */
> > > +		r |= GENMASK(10, 0);
> > > +	} else {
> > > +		/* take the 11 most important bits. */
> > > +		r |= (in >> 22) & GENMASK(10, 0);
> > > +	}
> > > +
> > > +	return r;
> > > +}
> > > +
> > > +static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
> > > +			      struct drm_crtc_state *state)
> > > +{
> > > +	struct drm_property_blob *blob = state->ctm;
> > > +	struct drm_color_ctm *ctm;
> > > +	const u64 *input;
> > > +	uint16_t coeffs[9] = { 0 };
> > > +	int i;
> > > +	struct cmdq_pkt *cmdq_pkt = NULL;
> > > +
> > > +	if (!blob)
> > > +		return;
> > > +
> > > +	ctm = (struct drm_color_ctm *)blob->data;
> > > +	input = ctm->matrix;
> > > +
> > > +	for (i = 0; i < ARRAY_SIZE(coeffs); i++)
> > > +		coeffs[i] = mtk_ctm_s31_32_to_s1_10(input[i]);
> > > +
> > > +	mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1],
> > > +		      comp, DISP_CCORR_COEF_0);
> > > +	mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3],
> > > +		      comp, DISP_CCORR_COEF_1);
> > > +	mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5],
> > > +		      comp, DISP_CCORR_COEF_2);
> > > +	mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7],
> > > +		      comp, DISP_CCORR_COEF_3);
> > > +	mtk_ddp_write(cmdq_pkt, coeffs[8] << 16,
> > > +		      comp, DISP_CCORR_COEF_4);
> > > +}
> > > +
> > >  static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
> > >  			      unsigned int h, unsigned int vrefresh,
> > >  			      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
> > > @@ -271,6 +330,7 @@ static void mtk_gamma_set(struct mtk_ddp_comp *comp,
> > >  	.config = mtk_ccorr_config,
> > >  	.start = mtk_ccorr_start,
> > >  	.stop = mtk_ccorr_stop,
> > > +	.ctm_set = mtk_ccorr_ctm_set,
> > >  };
> > >  
> > >  static const struct mtk_ddp_comp_funcs ddp_dither = {
> > > diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > index 384abae..20fe55d 100644
> > > --- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > +++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
> > > @@ -92,6 +92,8 @@ struct mtk_ddp_comp_funcs {
> > >  			  struct drm_crtc_state *state);
> > >  	void (*bgclr_in_on)(struct mtk_ddp_comp *comp);
> > >  	void (*bgclr_in_off)(struct mtk_ddp_comp *comp);
> > > +	void (*ctm_set)(struct mtk_ddp_comp *comp,
> > > +			struct drm_crtc_state *state);
> > >  };
> > >  
> > >  struct mtk_ddp_comp {
> > > @@ -205,6 +207,13 @@ static inline void mtk_ddp_comp_bgclr_in_off(struct mtk_ddp_comp *comp)
> > >  		comp->funcs->bgclr_in_off(comp);
> > >  }
> > >  
> > > +static inline void mtk_ddp_ctm_set(struct mtk_ddp_comp *comp,
> > > +				   struct drm_crtc_state *state)
> > > +{
> > > +	if (comp->funcs && comp->funcs->ctm_set)
> > > +		comp->funcs->ctm_set(comp, state);
> > > +}
> > > +
> > >  int mtk_ddp_comp_get_id(struct device_node *node,
> > >  			enum mtk_ddp_comp_type comp_type);
> > >  int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
> > 
> > 
> 
> 

Re: [PATCH v2, 0/2] drm/mediatek: Add ctm property support

[CK Hu]

Hi, Yongqiang:

On Fri, 2019-12-13 at 15:28 +0800, Yongqiang Niu wrote:
> Changes since v1:
> -separate gamma patch
> -remove cmdq support for ctm setting
> 

For this series, applied to mediatek-drm-next-5.6 [1], thanks.

[1]
https://github.com/ckhu-mediatek/linux.git-tags/commits/mediatek-drm-next-5.6

Regards,
CK

> 
> Yongqiang Niu (2):
>   drm/mediatek: Fix gamma correction issue
>   drm/mediatek: Add ctm property support
> 
>  drivers/gpu/drm/mediatek/mtk_drm_crtc.c     | 18 +++++++--
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 62 ++++++++++++++++++++++++++++-
>  drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h |  9 +++++
>  3 files changed, 85 insertions(+), 4 deletions(-)
>