From: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx> [ Upstream commit 06267d22f9ee6fd34150b6dcdb2fa6983e1a85bc ] When the topology calls for two interfaces on the current fixed topology of 2 DSC blocks, or uses 1 DSC block for a single interface (e.g. SC7280 with only one DSC block), there should be no merging of DSC output. This is already represented by the return value of dpu_encoder_use_dsc_merge(), but not yet used to correctly configure this flag. Fixes: 58dca9810749 ("drm/msm/disp/dpu1: Add support for DSC in encoder") Signed-off-by: Marijn Suijten <marijn.suijten@xxxxxxxxxxxxxx> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Patchwork: https://patchwork.freedesktop.org/patch/577067/ Link: https://lore.kernel.org/r/20240204-dpu-dsc-multiplex-v1-1-080963233c52@xxxxxxxxxxxxxx Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 86bfc109b2fae..b26d23b2ab6af 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -1867,7 +1867,9 @@ static void dpu_encoder_prep_dsc(struct dpu_encoder_virt *dpu_enc, dsc_common_mode = 0; pic_width = dsc->pic_width; - dsc_common_mode = DSC_MODE_MULTIPLEX | DSC_MODE_SPLIT_PANEL; + dsc_common_mode = DSC_MODE_SPLIT_PANEL; + if (dpu_encoder_use_dsc_merge(enc_master->parent)) + dsc_common_mode |= DSC_MODE_MULTIPLEX; if (enc_master->intf_mode == INTF_MODE_VIDEO) dsc_common_mode |= DSC_MODE_VIDEO; -- 2.43.0