drm/msm/dpu: drop dpu_csc_cfg from dpu_plane

Simplify code surrounding CSC table setup by removing struct dpu_csc_cfg
pointer from dpu_plane and getting it directly at the CSC setup time.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Link: https://lore.kernel.org/r/20210930140002.308628-8-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.c

@@ -539,7 +539,7 @@ static void dpu_hw_sspp_setup_sourceaddress(struct dpu_hw_pipe *ctx,
 }
 
 static void dpu_hw_sspp_setup_csc(struct dpu_hw_pipe *ctx,
-		struct dpu_csc_cfg *data)
+		const struct dpu_csc_cfg *data)
 {
 	u32 idx;
 	bool csc10 = false;

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_sspp.h

@@ -262,7 +262,7 @@ struct dpu_hw_sspp_ops {
 	 * @ctx: Pointer to pipe context
 	 * @data: Pointer to config structure
 	 */
-	void (*setup_csc)(struct dpu_hw_pipe *ctx, struct dpu_csc_cfg *data);
+	void (*setup_csc)(struct dpu_hw_pipe *ctx, const struct dpu_csc_cfg *data);
 
 	/**
 	 * setup_solidfill - enable/disable colorfill

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.c

@@ -374,7 +374,7 @@ u32 dpu_hw_get_scaler3_ver(struct dpu_hw_blk_reg_map *c,
 
 void dpu_hw_csc_setup(struct dpu_hw_blk_reg_map *c,
 		u32 csc_reg_off,
-		struct dpu_csc_cfg *data, bool csc10)
+		const struct dpu_csc_cfg *data, bool csc10)
 {
 	static const u32 matrix_shift = 7;
 	u32 clamp_shift = csc10 ? 16 : 8;

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_util.h

@@ -322,6 +322,6 @@ u32 dpu_hw_get_scaler3_ver(struct dpu_hw_blk_reg_map *c,
 
 void dpu_hw_csc_setup(struct dpu_hw_blk_reg_map  *c,
 		u32 csc_reg_off,
-		struct dpu_csc_cfg *data, bool csc10);
+		const struct dpu_csc_cfg *data, bool csc10);
 
 #endif /* _DPU_HW_UTIL_H */

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -90,7 +90,6 @@ enum dpu_plane_qos {
 /*
  * struct dpu_plane - local dpu plane structure
  * @aspace: address space pointer
- * @csc_ptr: Points to dpu_csc_cfg structure to use for current
  * @mplane_list: List of multirect planes of the same pipe
  * @catalog: Points to dpu catalog structure
  * @revalidate: force revalidation of all the plane properties
@@ -111,8 +110,6 @@ struct dpu_plane {
 	struct list_head mplane_list;
 	struct dpu_mdss_cfg *catalog;
 
-	struct dpu_csc_cfg *csc_ptr;
-
 	const struct dpu_sspp_sub_blks *pipe_sblk;
 
 	/* debugfs related stuff */
@@ -607,9 +604,7 @@ static void _dpu_plane_setup_scaler3(struct dpu_plane *pdpu,
 	scale_cfg->enable = 1;
 }
 
-static void _dpu_plane_setup_csc(struct dpu_plane *pdpu)
-{
-	static const struct dpu_csc_cfg dpu_csc_YUV2RGB_601L = {
+static const struct dpu_csc_cfg dpu_csc_YUV2RGB_601L = {
 	{
 		/* S15.16 format */
 		0x00012A00, 0x00000000, 0x00019880,
@@ -622,8 +617,9 @@ static void _dpu_plane_setup_csc(struct dpu_plane *pdpu)
 	/* unsigned clamp */
 	{ 0x10, 0xeb, 0x10, 0xf0, 0x10, 0xf0,},
 	{ 0x00, 0xff, 0x00, 0xff, 0x00, 0xff,},
-	};
-	static const struct dpu_csc_cfg dpu_csc10_YUV2RGB_601L = {
+};
+
+static const struct dpu_csc_cfg dpu_csc10_YUV2RGB_601L = {
 	{
 		/* S15.16 format */
 		0x00012A00, 0x00000000, 0x00019880,
@@ -636,22 +632,31 @@ static void _dpu_plane_setup_csc(struct dpu_plane *pdpu)
 	/* unsigned clamp */
 	{ 0x40, 0x3ac, 0x40, 0x3c0, 0x40, 0x3c0,},
 	{ 0x00, 0x3ff, 0x00, 0x3ff, 0x00, 0x3ff,},
-	};
+};
+
+static const struct dpu_csc_cfg *_dpu_plane_get_csc(struct dpu_plane *pdpu, const struct dpu_format *fmt)
+{
+	const struct dpu_csc_cfg *csc_ptr;
 
 	if (!pdpu) {
 		DPU_ERROR("invalid plane\n");
-		return;
+		return NULL;
 	}
 
+	if (!DPU_FORMAT_IS_YUV(fmt))
+		return NULL;
+
 	if (BIT(DPU_SSPP_CSC_10BIT) & pdpu->features)
-		pdpu->csc_ptr = (struct dpu_csc_cfg *)&dpu_csc10_YUV2RGB_601L;
+		csc_ptr = &dpu_csc10_YUV2RGB_601L;
 	else
-		pdpu->csc_ptr = (struct dpu_csc_cfg *)&dpu_csc_YUV2RGB_601L;
+		csc_ptr = &dpu_csc_YUV2RGB_601L;
 
 	DPU_DEBUG_PLANE(pdpu, "using 0x%X 0x%X 0x%X...\n",
-			pdpu->csc_ptr->csc_mv[0],
-			pdpu->csc_ptr->csc_mv[1],
-			pdpu->csc_ptr->csc_mv[2]);
+			csc_ptr->csc_mv[0],
+			csc_ptr->csc_mv[1],
+			csc_ptr->csc_mv[2]);
+
+	return csc_ptr;
 }
 
 static void _dpu_plane_setup_scaler(struct dpu_plane *pdpu,
@@ -1061,8 +1066,13 @@ void dpu_plane_flush(struct drm_plane *plane)
 	else if (pdpu->color_fill & DPU_PLANE_COLOR_FILL_FLAG)
 		/* force 100% alpha */
 		_dpu_plane_color_fill(pdpu, pdpu->color_fill, 0xFF);
-	else if (pdpu->pipe_hw && pdpu->csc_ptr && pdpu->pipe_hw->ops.setup_csc)
-		pdpu->pipe_hw->ops.setup_csc(pdpu->pipe_hw, pdpu->csc_ptr);
+	else if (pdpu->pipe_hw && pdpu->pipe_hw->ops.setup_csc) {
+		const struct dpu_format *fmt = to_dpu_format(msm_framebuffer_format(plane->state->fb));
+		const struct dpu_csc_cfg *csc_ptr = _dpu_plane_get_csc(pdpu, fmt);
+
+		if (csc_ptr)
+			pdpu->pipe_hw->ops.setup_csc(pdpu->pipe_hw, csc_ptr);
+	}
 
 	/* flag h/w flush complete */
 	if (plane->state)
@@ -1194,12 +1204,6 @@ static void dpu_plane_sspp_atomic_update(struct drm_plane *plane)
 
 			pdpu->pipe_hw->ops.setup_cdp(pdpu->pipe_hw, cdp_cfg);
 		}
-
-		/* update csc */
-		if (DPU_FORMAT_IS_YUV(fmt))
-			_dpu_plane_setup_csc(pdpu);
-		else
-			pdpu->csc_ptr = NULL;
 	}
 
 	_dpu_plane_set_qos_lut(plane, fb, &pipe_cfg);