diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-09-24 22:48:10 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2020-10-01 02:14:52 +0300 |
| commit | 562ad8add4064fb804e8067db2c3d4716b8274ba (patch) | |
| tree | a5955947da37437880a53b7fed82f1a206674024 /drivers | |
| parent | 0dbacc89555305f2c4526b725da5e3aea64c8352 (diff) | |
| download | linux-562ad8add4064fb804e8067db2c3d4716b8274ba.tar.xz | |
drm/i915: Implement display WA #1142:kbl,cfl,cml
Implement display w/a #1142. This supposedly fixes some underruns
with FBC+VTd. Bspec says we should use the same programming regardless
of circumstances. Apparently we should flip the magic bits before
turning on any planes so let's put this into the early w/as.
Cc: Lee Shawn C <shawn.c.lee@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200924194810.10293-1-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_display.c | 9 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index b7ae60a376ed..aa31a52ebfbe 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -18904,6 +18904,15 @@ static void intel_early_display_was(struct drm_i915_private *dev_priv) intel_de_write(dev_priv, CHICKEN_PAR1_1, intel_de_read(dev_priv, CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES); } + + if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) || IS_COMETLAKE(dev_priv)) { + /* Display WA #1142:kbl,cfl,cml */ + intel_de_rmw(dev_priv, CHICKEN_PAR1_1, + KBL_ARB_FILL_SPARE_22, KBL_ARB_FILL_SPARE_22); + intel_de_rmw(dev_priv, CHICKEN_MISC_2, + KBL_ARB_FILL_SPARE_13 | KBL_ARB_FILL_SPARE_14, + KBL_ARB_FILL_SPARE_14); + } } static void ibx_sanitize_pch_hdmi_port(struct drm_i915_private *dev_priv, diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 47730a176698..88c215cf97d4 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -7866,6 +7866,7 @@ enum { # define CHICKEN3_DGMG_DONE_FIX_DISABLE (1 << 2) #define CHICKEN_PAR1_1 _MMIO(0x42080) +#define KBL_ARB_FILL_SPARE_22 REG_BIT(22) #define DIS_RAM_BYPASS_PSR2_MAN_TRACK (1 << 16) #define SKL_DE_COMPRESSED_HASH_MODE (1 << 15) #define DPA_MASK_VBLANK_SRD (1 << 15) @@ -7878,6 +7879,8 @@ enum { #define CHICKEN_MISC_2 _MMIO(0x42084) #define CNL_COMP_PWR_DOWN (1 << 23) +#define KBL_ARB_FILL_SPARE_14 REG_BIT(14) +#define KBL_ARB_FILL_SPARE_13 REG_BIT(13) #define GLK_CL2_PWR_DOWN (1 << 12) #define GLK_CL1_PWR_DOWN (1 << 11) #define GLK_CL0_PWR_DOWN (1 << 10) |