admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915: Defeature DRRS on LNL+

Browse Source 
DRRS has been defeatured on LNL+. Adjust HAS_DOUBLE_BUFFERED_M_N()
to match.

Note that the M/N registers still appear to be double buffered under
the hood but the double buffer update point is now documented to be
just the last register write to the M/N registers, so it no longer
happens synchronously with the vblank/MSA transmission. We should
perhaps rename HAS_DOUBLE_BUFFERED_M_N() to more accurately reflect
reality, but couldn't come up with a decent name right now...

Bspec: 68917
HSD: 14016007525
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250912135926.18910-1-ville.syrjala@linux.intel.com
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
This commit is contained in:
Ville Syrjälä
2025-09-12 16:59:26 +03:00
parent 96e556ef5c
commit 089b5773c2
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/display/intel_display_device.h
View File

@@ -155,7 +155,7 @@ struct intel_display_platforms {
#define HAS_DISPLAY(__display) (DISPLAY_RUNTIME_INFO(__display)->pipe_mask != 0)
#define HAS_DMC(__display) (DISPLAY_RUNTIME_INFO(__display)->has_dmc)
#define HAS_DMC_WAKELOCK(__display) (DISPLAY_VER(__display) >= 20)
#define HAS_DOUBLE_BUFFERED_M_N(__display) (DISPLAY_VER(__display) >= 9 || (__display)->platform.broadwell)
#define HAS_DOUBLE_BUFFERED_M_N(__display) (IS_DISPLAY_VER((__display), 9, 14) || (__display)->platform.broadwell)
#define HAS_DOUBLE_BUFFERED_LUT(__display) (DISPLAY_VER(__display) >= 30)
#define HAS_DOUBLE_WIDE(__display) (DISPLAY_VER(__display) < 4)
#define HAS_DP20(__display) ((__display)->platform.dg2 || DISPLAY_VER(__display) >= 14)