Re: [PATCH 1/8] drm/msm/dpu: link DSPP_2/_3 blocks on SM8150

From: Abhinav Kumar
Date: Mon Dec 16 2024 - 16:15:50 EST




On 12/16/2024 12:27 AM, Dmitry Baryshkov wrote:
Link DSPP_2 to the LM_2 and DSPP_3 to the LM_3 mixer blocks.

Fixes: 05ae91d960fd ("drm/msm/dpu: enable DSPP support on SM8[12]50")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h | 2 ++
1 file changed, 2 insertions(+)


Change looks fine

Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>

One question below (not tied to the change but arose due to it):

diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h
index 6ccfde82fecdb4e3612df161814b16f7af40ca5f..421afacb7248039abd9fb66bcb73b756ae0d640a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_5_0_sm8150.h
@@ -164,6 +164,7 @@ static const struct dpu_lm_cfg sm8150_lm[] = {
.sblk = &sdm845_lm_sblk,
.lm_pair = LM_3,
.pingpong = PINGPONG_2,
+ .dspp = DSPP_2,
}, {
.name = "lm_3", .id = LM_3,
.base = 0x47000, .len = 0x320,
@@ -171,6 +172,7 @@ static const struct dpu_lm_cfg sm8150_lm[] = {
.sblk = &sdm845_lm_sblk,
.lm_pair = LM_2,
.pingpong = PINGPONG_3,
+ .dspp = DSPP_3,
}, {
.name = "lm_4", .id = LM_4,
.base = 0x48000, .len = 0x320,


the consumer of .dspp seems to be in the RM code which is used to map the DSPP to encoder_id but is there really any case where lm_id != dspp_id ... I guess I am missing the context of why DSPP id needs to be tracked as LMs and DSPPs go together. Let me also check this part internally.