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drm/i915/skl: Implement WaEnableLbsSlaRetryTimerDecrement

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This W/A is put in a gen9 specific function because it may well be
needed on other gen9 platforms.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Nick Hoath <nicholas.hoath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2015-02-09 19:33:13 +00:00 committed by Daniel Vetter
parent 183c6daceb
commit 77719d28ae
2 changed files with 14 additions and 0 deletions
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3
drivers/gpu/drm/i915/i915_reg.h
View File

@ -5285,6 +5285,9 @@ enum skl_disp_power_wells {
#define HSW_SCRATCH1 0xb038
#define HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE (1<<27)
#define BDW_SCRATCH1 0xb11c
#define GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE (1<<2)
/* PCH */
/* south display engine interrupt: IBX */

11
drivers/gpu/drm/i915/intel_pm.c
View File

@ -52,10 +52,21 @@
#define INTEL_RC6p_ENABLE (1<<1)
#define INTEL_RC6pp_ENABLE (1<<2)
static void gen9_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
/* WaEnableLbsSlaRetryTimerDecrement:skl */
I915_WRITE(BDW_SCRATCH1, I915_READ(BDW_SCRATCH1) |
GEN9_LBS_SLA_RETRY_TIMER_DECREMENT_ENABLE);
}
static void skl_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
gen9_init_clock_gating(dev);
if (INTEL_REVID(dev) == SKL_REVID_A0) {
/*
* WaDisableSDEUnitClockGating:skl