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drm/i915/gen9: Write dc state debugmask bits only once 

DMC debugmask bits should stick so no need to write them
everytime dc state is changed.

v2: Write after firmware has been successfully loaded (Ville)

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/1455808874-22089-5-git-send-email-mika.kuoppala@intel.com
This commit is contained in:
Mika Kuoppala 2016-02-18 17:21:14 +02:00 committed by Imre Deak
parent 5b076889f6
commit 1e657ad7a4
3 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/gpu/drm/i915/intel_csr.c
View File

@ -220,19 +220,19 @@ static const struct stepping_info *intel_get_stepping_info(struct drm_device *de
* Everytime display comes back from low power state this function is called to
* copy the firmware from internal memory to registers.
*/
void intel_csr_load_program(struct drm_i915_private *dev_priv)
bool intel_csr_load_program(struct drm_i915_private *dev_priv)
{
u32 *payload = dev_priv->csr.dmc_payload;
uint32_t i, fw_size;
if (!IS_GEN9(dev_priv)) {
DRM_ERROR("No CSR support available for this platform\n");
return;
return false;
}
if (!dev_priv->csr.dmc_payload) {
DRM_ERROR("Tried to program CSR with empty payload\n");
return;
return false;
}
fw_size = dev_priv->csr.dmc_fw_size;
@ -245,6 +245,8 @@ void intel_csr_load_program(struct drm_i915_private *dev_priv)
}
dev_priv->csr.dc_state = 0;
return true;
}
static uint32_t *parse_csr_fw(struct drm_i915_private *dev_priv,

2
drivers/gpu/drm/i915/intel_drv.h
View File

@ -1225,7 +1225,7 @@ u32 skl_plane_ctl_rotation(unsigned int rotation);
/* intel_csr.c */
void intel_csr_ucode_init(struct drm_i915_private *);
void intel_csr_load_program(struct drm_i915_private *);
bool intel_csr_load_program(struct drm_i915_private *);
void intel_csr_ucode_fini(struct drm_i915_private *);
/* intel_dp.c */

7
drivers/gpu/drm/i915/intel_runtime_pm.c
View File

@ -529,9 +529,6 @@ static void gen9_set_dc_state(struct drm_i915_private *dev_priv, uint32_t state)
else if (i915.enable_dc == 1 && state > DC_STATE_EN_UPTO_DC5)
state = DC_STATE_EN_UPTO_DC5;
if (state & DC_STATE_EN_UPTO_DC5_DC6_MASK)
gen9_set_dc_state_debugmask(dev_priv);
val = I915_READ(DC_STATE_EN);
DRM_DEBUG_KMS("Setting DC state from %02x to %02x\n",
val & mask, state);
@ -2122,8 +2119,8 @@ static void skl_display_core_init(struct drm_i915_private *dev_priv,
skl_init_cdclk(dev_priv);
if (dev_priv->csr.dmc_payload)
intel_csr_load_program(dev_priv);
if (dev_priv->csr.dmc_payload && intel_csr_load_program(dev_priv))
gen9_set_dc_state_debugmask(dev_priv);
}
static void skl_display_core_uninit(struct drm_i915_private *dev_priv)