diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display.c | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 |
2 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index b4eb48a33caa..55c6a34e11e0 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2209,6 +2209,21 @@ static void icl_set_pipe_chicken(struct intel_crtc *crtc) * across pipe */ tmp |= PIXEL_ROUNDING_TRUNC_FB_PASSTHRU; + + /* + * "The underrun recovery mechanism should be disabled + * when the following is enabled for this pipe: + * WiDi + * Downscaling (this includes YUV420 fullblend) + * COG + * DSC + * PSR2" + * + * FIXME: enable whenever possible... + */ + if (IS_ALDERLAKE_P(dev_priv)) + tmp |= UNDERRUN_RECOVERY_DISABLE; + intel_de_write(dev_priv, PIPE_CHICKEN(pipe), tmp); } diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 5fbe5c7a1abe..dd522e45828b 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -8362,6 +8362,7 @@ enum { #define _PIPEC_CHICKEN 0x72038 #define PIPE_CHICKEN(pipe) _MMIO_PIPE(pipe, _PIPEA_CHICKEN,\ _PIPEB_CHICKEN) +#define UNDERRUN_RECOVERY_DISABLE REG_BIT(30) #define PIXEL_ROUNDING_TRUNC_FB_PASSTHRU (1 << 15) #define PER_PIXEL_ALPHA_BYPASS_EN (1 << 7) |