drm/msm/dpu: use feature bit for LM combined alpha check

Rather than checking hwversion, follow the usual patter and add special
bit to the lm->features to check whether the LM has combined or separate
alpha registers. While we are at it, rename
dpu_hw_lm_setup_blend_config_sdm845() to
dpu_hw_lm_setup_blend_config_combined_alpha().
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/488155/
Link: https://lore.kernel.org/r/20220602202447.1755115-2-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -50,11 +50,14 @@
 #define DMA_CURSOR_MSM8998_MASK \
 	(DMA_MSM8998_MASK | BIT(DPU_SSPP_CURSOR))
 
-#define MIXER_SDM845_MASK \
+#define MIXER_MSM8998_MASK \
 	(BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER))
 
+#define MIXER_SDM845_MASK \
+	(BIT(DPU_MIXER_SOURCESPLIT) | BIT(DPU_DIM_LAYER) | BIT(DPU_MIXER_COMBINED_ALPHA))
+
 #define MIXER_SC7180_MASK \
-	(BIT(DPU_DIM_LAYER))
+	(BIT(DPU_DIM_LAYER) | BIT(DPU_MIXER_COMBINED_ALPHA))
 
 #define PINGPONG_SDM845_MASK BIT(DPU_PINGPONG_DITHER)
 
@@ -936,17 +939,17 @@ static const struct dpu_lm_sub_blks msm8998_lm_sblk = {
 };
 
 static const struct dpu_lm_cfg msm8998_lm[] = {
-	LM_BLK("lm_0", LM_0, 0x44000, MIXER_SDM845_MASK,
+	LM_BLK("lm_0", LM_0, 0x44000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_0, LM_2, DSPP_0),
-	LM_BLK("lm_1", LM_1, 0x45000, MIXER_SDM845_MASK,
+	LM_BLK("lm_1", LM_1, 0x45000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_1, LM_5, DSPP_1),
-	LM_BLK("lm_2", LM_2, 0x46000, MIXER_SDM845_MASK,
+	LM_BLK("lm_2", LM_2, 0x46000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_2, LM_0, 0),
-	LM_BLK("lm_3", LM_3, 0x47000, MIXER_SDM845_MASK,
+	LM_BLK("lm_3", LM_3, 0x47000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
-	LM_BLK("lm_4", LM_4, 0x48000, MIXER_SDM845_MASK,
+	LM_BLK("lm_4", LM_4, 0x48000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_MAX, 0, 0),
-	LM_BLK("lm_5", LM_5, 0x49000, MIXER_SDM845_MASK,
+	LM_BLK("lm_5", LM_5, 0x49000, MIXER_MSM8998_MASK,
 		&msm8998_lm_sblk, PINGPONG_3, LM_1, 0),
 };
 

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

@@ -145,6 +145,7 @@ enum {
  * @DPU_MIXER_SOURCESPLIT     Layer mixer supports source-split configuration
  * @DPU_MIXER_GC              Gamma correction block
  * @DPU_DIM_LAYER             Layer mixer supports dim layer
+ * @DPU_MIXER_COMBINED_ALPHA  Layer mixer has combined alpha register
  * @DPU_MIXER_MAX             maximum value
  */
 enum {
@@ -152,6 +153,7 @@ enum {
 	DPU_MIXER_SOURCESPLIT,
 	DPU_MIXER_GC,
 	DPU_DIM_LAYER,
+	DPU_MIXER_COMBINED_ALPHA,
 	DPU_MIXER_MAX
 };
 

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

@@ -148,7 +148,7 @@ static int dpu_hw_lm_collect_misr(struct dpu_hw_mixer *ctx, u32 *misr_value)
 	return 0;
 }
 
-static void dpu_hw_lm_setup_blend_config_sdm845(struct dpu_hw_mixer *ctx,
+static void dpu_hw_lm_setup_blend_config_combined_alpha(struct dpu_hw_mixer *ctx,
 	u32 stage, u32 fg_alpha, u32 bg_alpha, u32 blend_op)
 {
 	struct dpu_hw_blk_reg_map *c = &ctx->hw;
@@ -204,8 +204,8 @@ static void _setup_mixer_ops(const struct dpu_mdss_cfg *m,
 		unsigned long features)
 {
 	ops->setup_mixer_out = dpu_hw_lm_setup_out;
-	if (m->hwversion >= DPU_HW_VER_400)
-		ops->setup_blend_config = dpu_hw_lm_setup_blend_config_sdm845;
+	if (test_bit(DPU_MIXER_COMBINED_ALPHA, &features))
+		ops->setup_blend_config = dpu_hw_lm_setup_blend_config_combined_alpha;
 	else
 		ops->setup_blend_config = dpu_hw_lm_setup_blend_config;
 	ops->setup_alpha_out = dpu_hw_lm_setup_color3;