Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/i915/psr: Fix for Panel Replay X granularity DPCD register handling
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: 1cc854647450 ("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
+8
-3
+8
-3
drivers/gpu/drm/i915/display/intel_psr.c
+8
-3
drivers/gpu/drm/i915/display/intel_psr.c
···
1306
1306
u16 sink_y_granularity = crtc_state->has_panel_replay ?
1307
1307
connector->dp.panel_replay_caps.su_y_granularity :
1308
1308
connector->dp.psr_caps.su_y_granularity;
1309
-
u16 sink_w_granularity = crtc_state->has_panel_replay ?
1310
-
connector->dp.panel_replay_caps.su_w_granularity :
1311
-
connector->dp.psr_caps.su_w_granularity;
1309
+
u16 sink_w_granularity;
1310
+
1311
+
if (crtc_state->has_panel_replay)
1312
+
sink_w_granularity = connector->dp.panel_replay_caps.su_w_granularity ==
1313
+
DP_PANEL_REPLAY_FULL_LINE_GRANULARITY ?
1314
+
crtc_hdisplay : connector->dp.panel_replay_caps.su_w_granularity;
1315
+
else
1316
+
sink_w_granularity = connector->dp.psr_caps.su_w_granularity;
1312
1317
1313
1318
/* PSR2 HW only send full lines so we only need to validate the width */
1314
1319
if (crtc_hdisplay % sink_w_granularity)