On Wed, Feb 24, 2016 at 07:57:46PM +0200, Imre Deak wrote:
> Disabling the DC states when it's already disabled is a valid scenario,
> for example during HW state sanitization during driver loading and
> resuming or when DC states are disabled via the i915.enable_dc or
> disable_power_well option.
>
> CC: Patrik Jakobsson <patrik.jakobs...@linux.intel.com>
> Signed-off-by: Imre Deak <imre.d...@intel.com>
Nice to see these go.
Reviewed-by: Patrik Jakobsson <patrik.jakobs...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_runtime_pm.c | 41
> +--------------------------------
> 1 file changed, 1 insertion(+), 40 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
> b/drivers/gpu/drm/i915/intel_runtime_pm.c
> index 7f65d5f..1661c2a 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> @@ -458,8 +458,6 @@ static void assert_can_enable_dc9(struct drm_i915_private
> *dev_priv)
> static void assert_can_disable_dc9(struct drm_i915_private *dev_priv)
> {
> WARN(intel_irqs_enabled(dev_priv), "Interrupts not disabled yet.\n");
> - WARN(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_DC9),
> - "DC9 already programmed to be disabled.\n");
> WARN(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC5,
> "DC5 still not disabled.\n");
>
> @@ -602,18 +600,6 @@ static void assert_can_enable_dc5(struct
> drm_i915_private *dev_priv)
> assert_csr_loaded(dev_priv);
> }
>
> -static void assert_can_disable_dc5(struct drm_i915_private *dev_priv)
> -{
> - /*
> - * During initialization, the firmware may not be loaded yet.
> - * We still want to make sure that the DC enabling flag is cleared.
> - */
> - if (dev_priv->power_domains.initializing)
> - return;
> -
> - assert_rpm_wakelock_held(dev_priv);
> -}
> -
> static void gen9_enable_dc5(struct drm_i915_private *dev_priv)
> {
> assert_can_enable_dc5(dev_priv);
> @@ -638,29 +624,6 @@ static void assert_can_enable_dc6(struct
> drm_i915_private *dev_priv)
> assert_csr_loaded(dev_priv);
> }
>
> -static void assert_can_disable_dc6(struct drm_i915_private *dev_priv)
> -{
> - /*
> - * During initialization, the firmware may not be loaded yet.
> - * We still want to make sure that the DC enabling flag is cleared.
> - */
> - if (dev_priv->power_domains.initializing)
> - return;
> -
> - WARN_ONCE(!(I915_READ(DC_STATE_EN) & DC_STATE_EN_UPTO_DC6),
> - "DC6 already programmed to be disabled.\n");
> -}
> -
> -static void gen9_disable_dc5_dc6(struct drm_i915_private *dev_priv)
> -{
> - assert_can_disable_dc5(dev_priv);
> -
> - if (dev_priv->csr.allowed_dc_mask & DC_STATE_EN_UPTO_DC6)
> - assert_can_disable_dc6(dev_priv);
> -
> - gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
> -}
> -
> void skl_enable_dc6(struct drm_i915_private *dev_priv)
> {
> assert_can_enable_dc6(dev_priv);
> @@ -673,8 +636,6 @@ void skl_enable_dc6(struct drm_i915_private *dev_priv)
>
> void skl_disable_dc6(struct drm_i915_private *dev_priv)
> {
> - assert_can_disable_dc6(dev_priv);
> -
> DRM_DEBUG_KMS("Disabling DC6\n");
>
> gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
> @@ -828,7 +789,7 @@ static bool gen9_dc_off_power_well_enabled(struct
> drm_i915_private *dev_priv,
> static void gen9_dc_off_power_well_enable(struct drm_i915_private *dev_priv,
> struct i915_power_well *power_well)
> {
> - gen9_disable_dc5_dc6(dev_priv);
> + gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
> }
>
> static void gen9_dc_off_power_well_disable(struct drm_i915_private *dev_priv,
> --
> 2.5.0
>
--
---
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