diff options
| author | Radhakrishna Sripada <radhakrishna.sripada@intel.com> | 2023-03-01 21:10:49 +0100 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2023-03-20 09:59:54 +0100 |
| commit | 364ac7863fc161841e86388884bb7d5f4048031a (patch) | |
| tree | 0b8ece09bc5b502ac81fa557b8152b5952c74868 /drivers/gpu/drm | |
| parent | Linux 6.3-rc3 (diff) | |
| download | linux-364ac7863fc161841e86388884bb7d5f4048031a.tar.xz linux-364ac7863fc161841e86388884bb7d5f4048031a.zip | |
drm/i915/mtl: Fix Wa_16015201720 implementation
The commit 2357f2b271ad ("drm/i915/mtl: Initial display workarounds")
extended the workaround Wa_16015201720 to MTL. However the registers
that the original WA implemented moved for MTL.
Implement the workaround with the correct register.
v3: Skip clock gating for pipe C, D DMC's and fix the title
Fixes: 2357f2b271ad ("drm/i915/mtl: Initial display workarounds")
Cc: Matt Atwood <matthew.s.atwood@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230301201053.928709-2-radhakrishna.sripada@intel.com
(cherry picked from commit 0188be507b973e36f637ba010a369057c8cb7282)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dmc.c | 26 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 8 |
2 files changed, 26 insertions, 8 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c b/drivers/gpu/drm/i915/display/intel_dmc.c index 257aa2b7cf20..3485d5e6dd3c 100644 --- a/drivers/gpu/drm/i915/display/intel_dmc.c +++ b/drivers/gpu/drm/i915/display/intel_dmc.c @@ -384,15 +384,12 @@ static void disable_all_event_handlers(struct drm_i915_private *i915) } } -static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable) +static void adlp_pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable) { enum pipe pipe; - if (DISPLAY_VER(i915) < 13) - return; - /* - * Wa_16015201720:adl-p,dg2, mtl + * Wa_16015201720:adl-p,dg2 * The WA requires clock gating to be disabled all the time * for pipe A and B. * For pipe C and D clock gating needs to be disabled only @@ -408,6 +405,25 @@ static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable) PIPEDMC_GATING_DIS, 0); } +static void mtl_pipedmc_clock_gating_wa(struct drm_i915_private *i915) +{ + /* + * Wa_16015201720 + * The WA requires clock gating to be disabled all the time + * for pipe A and B. + */ + intel_de_rmw(i915, GEN9_CLKGATE_DIS_0, 0, + MTL_PIPEDMC_GATING_DIS_A | MTL_PIPEDMC_GATING_DIS_B); +} + +static void pipedmc_clock_gating_wa(struct drm_i915_private *i915, bool enable) +{ + if (DISPLAY_VER(i915) >= 14 && enable) + mtl_pipedmc_clock_gating_wa(i915); + else if (DISPLAY_VER(i915) == 13) + adlp_pipedmc_clock_gating_wa(i915, enable); +} + void intel_dmc_enable_pipe(struct drm_i915_private *i915, enum pipe pipe) { if (!has_dmc_id_fw(i915, PIPE_TO_DMC_ID(pipe))) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3b2642397b82..19b047875e62 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1786,9 +1786,11 @@ * GEN9 clock gating regs */ #define GEN9_CLKGATE_DIS_0 _MMIO(0x46530) -#define DARBF_GATING_DIS (1 << 27) -#define PWM2_GATING_DIS (1 << 14) -#define PWM1_GATING_DIS (1 << 13) +#define DARBF_GATING_DIS REG_BIT(27) +#define MTL_PIPEDMC_GATING_DIS_A REG_BIT(15) +#define MTL_PIPEDMC_GATING_DIS_B REG_BIT(14) +#define PWM2_GATING_DIS REG_BIT(14) +#define PWM1_GATING_DIS REG_BIT(13) #define GEN9_CLKGATE_DIS_3 _MMIO(0x46538) #define TGL_VRH_GATING_DIS REG_BIT(31) |