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

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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
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8
drivers/gpu/drm/i915/intel_csr.c
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@@ -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,