leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915: Implement WaDisableVFclkgate.

Browse Source 
This workaround supposedly fixes some hangs in the VF unit.

Signed-off-by: Rafael Antognolli <rafael.antognolli@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171216001117.14232-1-rafael.antognolli@intel.com
This commit is contained in:
Rafael Antognolli 2017-12-15 16:11:16 -08:00 committed by Rodrigo Vivi
parent acfb9973a0
commit 01ab0f9216
2 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -3875,6 +3875,9 @@ enum {
#define SARBUNIT_CLKGATE_DIS (1 << 5)
#define RCCUNIT_CLKGATE_DIS (1 << 7)
#define UNSLICE_UNIT_LEVEL_CLKGATE _MMIO(0x9434)
#define VFUNIT_CLKGATE_DIS (1 << 20)
/*
* Display engine regs
*/

5
drivers/gpu/drm/i915/intel_pm.c
View File

@ -8447,6 +8447,11 @@ static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_B0))
val |= SARBUNIT_CLKGATE_DIS;
I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE, val);
/* WaDisableVFclkgate:cnl */
val = I915_READ(UNSLICE_UNIT_LEVEL_CLKGATE);
val |= VFUNIT_CLKGATE_DIS;
I915_WRITE(UNSLICE_UNIT_LEVEL_CLKGATE, val);
}
static void cfl_init_clock_gating(struct drm_i915_private *dev_priv)