github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-25 15:41:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/msm/dpu: don't try using 2 LMs if only one DSC is available

Browse Source 
Current topology code will try using 2 LMs with just one DSC, which
breaks cases like SC7280 / Fairphone5. Forbid using 2 LMs split in such
a case.

Fixes: 1ce69c265a ("drm/msm/dpu: move resource allocation to CRTC")
Reported-by: Luca Weiss <luca.weiss@fairphone.com>
Closes: https://lore.kernel.org/r/DH1IKLU0YZYU.2SW4WYO7H3H4R@fairphone.com/
Tested-by: Luca Weiss <luca.weiss@fairphone.com> # qcm6490-fairphone-fp5
Patchwork: https://patchwork.freedesktop.org/patch/712386/
Link: https://lore.kernel.org/r/20260317-fix-3d-dsc-v1-1-88b54f62f659@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov 2026-03-17 17:30:05 +02:00
parent 536d2eb2bf
commit b9699dd862
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
View File

@ -1406,7 +1406,8 @@ static struct msm_display_topology dpu_crtc_get_topology(
topology.num_lm = 2;
else if (topology.num_dsc == 2)
topology.num_lm = 2;
else if (dpu_kms->catalog->caps->has_3d_merge)
else if (dpu_kms->catalog->caps->has_3d_merge &&
topology.num_dsc == 0)
topology.num_lm = (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1;
else
topology.num_lm = 1;