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drm/i915/display: Add workaround 22014263786

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This workaround fixes screen flickers with FBC.

BSpec: 33450
BSpec: 52890
BSpec: 54369
BSpec: 66624
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220419182753.364237-1-jose.souza@intel.com
This commit is contained in:
José Roberto de Souza 2022-04-19 11:27:52 -07:00
parent d90502d2ef
commit 1e53f9e414
2 changed files with 10 additions and 0 deletions
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9
drivers/gpu/drm/i915/display/intel_fbc.c
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@ -811,6 +811,14 @@ static void intel_fbc_program_cfb(struct intel_fbc *fbc)
fbc->funcs->program_cfb(fbc);
}
static void intel_fbc_program_workarounds(struct intel_fbc *fbc)
{
/* Wa_22014263786:icl,jsl,tgl,dg1,rkl,adls,dg2,adlp */
if (DISPLAY_VER(fbc->i915) >= 11)
intel_de_rmw(fbc->i915, ILK_DPFC_CHICKEN(fbc->id), 0,
DPFC_CHICKEN_FORCE_SLB_INVALIDATION);
}
static void __intel_fbc_cleanup_cfb(struct intel_fbc *fbc)
{
struct drm_i915_private *i915 = fbc->i915;
@ -1462,6 +1470,7 @@ static void __intel_fbc_enable(struct intel_atomic_state *state,
intel_fbc_update_state(state, crtc, plane);
intel_fbc_program_workarounds(fbc);
intel_fbc_program_cfb(fbc);
}

1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -1400,6 +1400,7 @@
#define DPFC_HT_MODIFY REG_BIT(31) /* pre-ivb */
#define DPFC_NUKE_ON_ANY_MODIFICATION REG_BIT(23) /* bdw+ */
#define DPFC_CHICKEN_COMP_DUMMY_PIXEL REG_BIT(14) /* glk+ */
#define DPFC_CHICKEN_FORCE_SLB_INVALIDATION REG_BIT(13) /* icl+ */
#define DPFC_DISABLE_DUMMY0 REG_BIT(8) /* ivb+ */
#define GLK_FBC_STRIDE(fbc_id) _MMIO_PIPE((fbc_id), 0x43228, 0x43268)