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drm/i915/icl: WaForwardProgressSoftReset

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Avoids a hang during soft reset.

v2: Rebased on top of the WA refactoring
v3: Added References (Mika)
v4:
  - Rebased
  - C, not lisp (Chris)
  - Which steppings affected by this are not clear.
    For the moment, apply unconditionally as per the
    BSpec (Mika)
  - Add reference to another HSD also related

References: HSDES#1405476379
References: HSDES#2006612137
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1525814984-20039-14-git-send-email-oscar.mateo@intel.com
This commit is contained in:
Oscar Mateo 2018-05-08 14:29:35 -07:00 committed by Mika Kuoppala
parent 5ba700c73a
commit 73f4e8a338
2 changed files with 12 additions and 0 deletions
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5
drivers/gpu/drm/i915/i915_reg.h
View file

@ -9897,6 +9897,11 @@ enum skl_power_gate {
/* Media decoder 2 MOCS registers */
#define GEN11_MFX2_MOCS(i) _MMIO(0x10000 + (i) * 4)
#define GEN10_SCRATCH_LNCF2 _MMIO(0xb0a0)
#define PMFLUSHDONE_LNICRSDROP (1 << 20)
#define PMFLUSH_GAPL3UNBLOCK (1 << 21)
#define PMFLUSHDONE_LNEBLK (1 << 22)
/* gamt regs */
#define GEN8_L3_LRA_1_GPGPU _MMIO(0x4dd4)
#define GEN8_L3_LRA_1_GPGPU_DEFAULT_VALUE_BDW 0x67F1427F /* max/min for LRA1/2 */

7
drivers/gpu/drm/i915/intel_workarounds.c
View file

@ -761,6 +761,13 @@ static void icl_gt_workarounds_apply(struct drm_i915_private *dev_priv)
I915_WRITE(INF_UNIT_LEVEL_CLKGATE,
I915_READ(INF_UNIT_LEVEL_CLKGATE) |
CGPSF_CLKGATE_DIS);
/* WaForwardProgressSoftReset:icl */
I915_WRITE(GEN10_SCRATCH_LNCF2,
I915_READ(GEN10_SCRATCH_LNCF2) |
PMFLUSHDONE_LNICRSDROP |
PMFLUSH_GAPL3UNBLOCK |
PMFLUSHDONE_LNEBLK);
}
void intel_gt_workarounds_apply(struct drm_i915_private *dev_priv)