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drm/i915/fbc: update the impacted platforms in wa_22014263786

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wa_22014263786 is not applicable to the BMG and hence exclude it
from the wa.

v2: Limit this wa to display verion 11 to 14, drop DG2 from the
    exclusion list, use intel_display_wa (Lucas)

v3: simplify the wa handling loop (Jani)
    Description of wa moved to place where wa is applied (Ville)

v4: drop the platforms line from wa comments (Lucas)

Bspec: 74212, 66624
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://lore.kernel.org/r/20251007214317.875781-1-vinod.govindapillai@intel.com
This commit is contained in:
Vinod Govindapillai 2025-10-08 00:43:17 +03:00
parent 56d9d03450
commit f65223ba4e
3 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/display/intel_display_wa.c
View File

@ -67,6 +67,8 @@ bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa,
return intel_display_needs_wa_16025573575(display);
case INTEL_DISPLAY_WA_14011503117:
return DISPLAY_VER(display) == 13;
case INTEL_DISPLAY_WA_22014263786:
return IS_DISPLAY_VERx100(display, 1100, 1400);
default:
drm_WARN(display->drm, 1, "Missing Wa number: %s\n", name);
break;

1
drivers/gpu/drm/i915/display/intel_display_wa.h
View File

@ -25,6 +25,7 @@ enum intel_display_wa {
INTEL_DISPLAY_WA_16023588340,
INTEL_DISPLAY_WA_16025573575,
INTEL_DISPLAY_WA_14011503117,
INTEL_DISPLAY_WA_22014263786,
};
bool __intel_display_wa(struct intel_display *display, enum intel_display_wa wa, const char *name);

9
drivers/gpu/drm/i915/display/intel_fbc.c
View File

@ -928,9 +928,12 @@ static void intel_fbc_program_workarounds(struct intel_fbc *fbc)
if (IS_DISPLAY_VER(display, 11, 12))
intel_de_rmw(display, ILK_DPFC_CHICKEN(fbc->id),
0, DPFC_CHICKEN_COMP_DUMMY_PIXEL);
/* Wa_22014263786:icl,jsl,tgl,dg1,rkl,adls,adlp,mtl */
if (DISPLAY_VER(display) >= 11 && !display->platform.dg2)
/*
* Wa_22014263786
* Fixes: Screen flicker with FBC and Package C state enabled
* Workaround: Forced SLB invalidation before start of new frame.
*/
if (intel_display_wa(display, 22014263786))
intel_de_rmw(display, ILK_DPFC_CHICKEN(fbc->id),
0, DPFC_CHICKEN_FORCE_SLB_INVALIDATION);