mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-09 04:21:03 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/i915/mtl: Fix Wa_16015201720 implementation

Browse Source 
The commit 2357f2b271 ("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: 2357f2b271 ("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
This commit is contained in:
Radhakrishna Sripada
2023-03-01 12:10:49 -08:00
parent 4b736ed405
commit 0188be507b
2 changed files with 26 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
drivers/gpu/drm/i915/display/intel_dmc.c
View File

@@ -424,15 +424,12 @@ 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
@@ -448,6 +445,25 @@ 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)
{
enum intel_dmc_id dmc_id = PIPE_TO_DMC_ID(pipe);

8
drivers/gpu/drm/i915/i915_reg.h
View File

@@ -1794,9 +1794,11 @@
* 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)