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drm/i915/gen9: Extend dmc debug mask to include cores

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Cores need to be included into the debug mask. We don't exactly
know what it does but the spec says it must be enabled. So obey.

v2: Cores should be only set for BXT (Imre, Art)

Cc: Imre Deak <imre.deak@intel.com>
Cc: Runyan, Arthur J <arthur.j.runyan@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1455877564-5128-1-git-send-email-mika.kuoppala@intel.com
This commit is contained in:
Mika Kuoppala 2016-02-19 12:26:04 +02:00 committed by Imre Deak
parent 779cb5d3dd
commit 5b076889f6
2 changed files with 11 additions and 6 deletions
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1
drivers/gpu/drm/i915/i915_reg.h
View File

@ -7568,6 +7568,7 @@ enum skl_disp_power_wells {
#define DC_STATE_EN_UPTO_DC5_DC6_MASK 0x3
#define DC_STATE_DEBUG _MMIO(0x45520)
#define DC_STATE_DEBUG_MASK_CORES (1<<0)
#define DC_STATE_DEBUG_MASK_MEMORY_UP (1<<1)
/* Please see hsw_read_dcomp() and hsw_write_dcomp() before using this register,

16
drivers/gpu/drm/i915/intel_runtime_pm.c
View File

@ -456,15 +456,19 @@ static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
*/
}
static void gen9_set_dc_state_debugmask_memory_up(
struct drm_i915_private *dev_priv)
static void gen9_set_dc_state_debugmask(struct drm_i915_private *dev_priv)
{
uint32_t val;
uint32_t val, mask;
mask = DC_STATE_DEBUG_MASK_MEMORY_UP;
if (IS_BROXTON(dev_priv))
mask |= DC_STATE_DEBUG_MASK_CORES;
/* The below bit doesn't need to be cleared ever afterwards */
val = I915_READ(DC_STATE_DEBUG);
if (!(val & DC_STATE_DEBUG_MASK_MEMORY_UP)) {
val |= DC_STATE_DEBUG_MASK_MEMORY_UP;
if ((val & mask) != mask) {
val |= mask;
I915_WRITE(DC_STATE_DEBUG, val);
POSTING_READ(DC_STATE_DEBUG);
}
@ -526,7 +530,7 @@ static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state)
state = DC_STATE_EN_UPTO_DC5;
if (state & DC_STATE_EN_UPTO_DC5_DC6_MASK)
gen9_set_dc_state_debugmask_memory_up(dev_priv);
gen9_set_dc_state_debugmask(dev_priv);
val = I915_READ(DC_STATE_EN);
DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",