Re: [PATCH v5 3/6] drm/msm/dpu: enable compression bit in cfg2 for DSC

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On 5/27/2024 7:21 AM, Jun Nie wrote:
Enable compression bit in cfg2 register for DSC in the DSI case

Signed-off-by: Jun Nie <jun.nie@xxxxxxxxxx>
---
  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 4 ++++
  1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
index f97221423249..34bfcfba3df2 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
@@ -177,6 +177,10 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *intf,
  	if (p->wide_bus_en && !dp_intf)
  		data_width = p->width >> 1;
+ /* TODO: handle DSC+DP case, we only handle DSC+DSI case so far */
+	if (p->compression_en && !dp_intf)
+		intf_cfg2 |= INTF_CFG2_DCE_DATA_COMPRESS;

Hi Jun,

The DSC/DCE enablement registers were only moved to INTF in DPU 7.x and later.

We should probably add some MDSS version check similar to what command mode INTF does here [1]

Thanks,

Jessica Zhang

+
  	hsync_data_start_x = hsync_start_x;
  	hsync_data_end_x =  hsync_start_x + data_width - 1;
--
2.34.1





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