github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 00:22:00 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/i915/psr: Fix for Panel Replay X granularity DPCD register handling

Browse Source 
DP specification is saying value 0xff 0xff in PANEL REPLAY SELECTIVE UPDATE
X GRANULARITY CAPABILITY registers (0xb2 and 0xb3) means full-line
granularity. Take this into account when handling Panel Replay X
granularity informed by the panel.

Fixes: 1cc8546474 ("drm/i915/psr: Use SU granularity information available in intel_connector")
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7284
Tested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patch.msgid.link/20260225074221.1744330-2-jouni.hogander@intel.com
This commit is contained in:
Jouni Högander 2026-02-25 09:42:21 +02:00
parent b933116732
commit f5c8f824a4
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/i915/display/intel_psr.c
View File

@ -1306,9 +1306,14 @@ static bool psr2_granularity_check(struct intel_crtc_state *crtc_state,
u16 sink_y_granularity = crtc_state->has_panel_replay ?
connector->dp.panel_replay_caps.su_y_granularity :
connector->dp.psr_caps.su_y_granularity;
u16 sink_w_granularity = crtc_state->has_panel_replay ?
connector->dp.panel_replay_caps.su_w_granularity :
connector->dp.psr_caps.su_w_granularity;
u16 sink_w_granularity;
if (crtc_state->has_panel_replay)
sink_w_granularity = connector->dp.panel_replay_caps.su_w_granularity ==
DP_PANEL_REPLAY_FULL_LINE_GRANULARITY ?
crtc_hdisplay : connector->dp.panel_replay_caps.su_w_granularity;
else
sink_w_granularity = connector->dp.psr_caps.su_w_granularity;
/* PSR2 HW only send full lines so we only need to validate the width */
if (crtc_hdisplay % sink_w_granularity)