[PATCH v4 2/7] drm/msm/dpu: add DPU_PINGPONG_DSC feature bit

[Kuogee Hsieh]

Legacy DPU (DPU < 7.0.0) requires PP block to be involved during
DSC setting up. Since then, enable and start the DSC encoder engine
had moved to INTF with helps of flush mechanism. This patch adds
DPU_PINGPONG_DSC feature bit to indicate that both
dpu_hw_pp_setup_dsc() and dpu_hw_pp_dsc_enable() pingpong ops
functions are required to complete DSC datapath setup and start
DSC engine.

Changes in v4:
-- add more details commit text

Reported-by: Marijn Suijten <marijn.suijten at somainline.org>
Signed-off-by: Kuogee Hsieh <quic_khsieh at quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h  | 2 ++
 drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 9 ++++++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
index 71584cd..5d210f3 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
@@ -144,6 +144,7 @@ enum {
  * @DPU_PINGPONG_SPLIT      PP block supports split fifo
  * @DPU_PINGPONG_SLAVE      PP block is a suitable slave for split fifo
  * @DPU_PINGPONG_DITHER,    Dither blocks
+ * @DPU_PINGPONG_DSC,       PP ops functions required for DSC
  * @DPU_PINGPONG_MAX
  */
 enum {
@@ -152,6 +153,7 @@ enum {
 	DPU_PINGPONG_SPLIT,
 	DPU_PINGPONG_SLAVE,
 	DPU_PINGPONG_DITHER,
+	DPU_PINGPONG_DSC,
 	DPU_PINGPONG_MAX
 };
 
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
index 3822e06..f255a04 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
@@ -264,9 +264,12 @@ static void _setup_pingpong_ops(struct dpu_hw_pingpong *c,
 	c->ops.get_autorefresh = dpu_hw_pp_get_autorefresh_config;
 	c->ops.poll_timeout_wr_ptr = dpu_hw_pp_poll_timeout_wr_ptr;
 	c->ops.get_line_count = dpu_hw_pp_get_line_count;
-	c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
-	c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
-	c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
+
+	if (features & BIT(DPU_PINGPONG_DSC)) {
+		c->ops.setup_dsc = dpu_hw_pp_setup_dsc;
+		c->ops.enable_dsc = dpu_hw_pp_dsc_enable;
+		c->ops.disable_dsc = dpu_hw_pp_dsc_disable;
+	}
 
 	if (test_bit(DPU_PINGPONG_DITHER, &features))
 		c->ops.setup_dither = dpu_hw_pp_setup_dither;
-- 
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