Re: [v2, 37/50] drm/msm/dpu: enable DPU_CTL_SPLIT_DISPLAY for sc8280xp

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On 30/03/2023 15:29, Konrad Dybcio wrote:


On 12.02.2023 00:12, Dmitry Baryshkov wrote:
Theoretically since sm8150 we should be using a single CTL for the
source split case, but since we do not support it for now, fallback to
DPU_CTL_SPLIT_DISPLAY.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
Hmm.. so is it a software construct? E.g. "pass half of the data to
each of the INTFs and tell them to cooperate"?

It is not a fully software construct, if I understand correctly. You have to program either a single CTL or two CTLs for a flush.


Apart from that, since it's temporary, I think it deserves a comment
reminding us to fix it eventually™

Sure, this is, I think, a next item on my plate after getting all of wide planes and catalog in: to rework CTL support for sm8150+.


Konrad
  drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h
index a3a79d908451..094876b1019b 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h
@@ -47,13 +47,13 @@ static const struct dpu_ctl_cfg sc8280xp_ctl[] = {
  	{
  	.name = "ctl_0", .id = CTL_0,
  	.base = 0x15000, .len = 0x204,
-	.features = CTL_SC7280_MASK,
+	.features = BIT(DPU_CTL_SPLIT_DISPLAY) | CTL_SC7280_MASK,
  	.intr_start = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 9),
  	},
  	{
  	.name = "ctl_1", .id = CTL_1,
  	.base = 0x16000, .len = 0x204,
-	.features = CTL_SC7280_MASK,
+	.features = BIT(DPU_CTL_SPLIT_DISPLAY) | CTL_SC7280_MASK,
  	.intr_start = DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 10),
  	},
  	{

--
With best wishes
Dmitry




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