Re: [PATCH v9 5/7] drm/i915/tgl: DC3CO PSR2 helper

Imre Deak
2019-09-27T15:51:01Z

On Thu, Sep 26, 2019 at 08:26:19PM +0530, Anshuman Gupta wrote:
> Disallow DC3CO state before PSR2 exit.
> Store dc3co_exitline from crtc state to psr dev_priv
> structure to use it easily whenever it requires.
>
> v1: Moved calling of tgl_enable_psr2_transcoder_exitline() to
> intel_psr_enable(). [Imre]
> v2: Moved tgl_psr2_deep_sleep_enable/disable function to
> the patches where they are getting used and used dc3co_exitline
> check instead of TGL check. [Imre]
>
> Cc: Jani Nikula <jani.nikula@intel.com>
> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Animesh Manna <animesh.manna@intel.com>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>

Please merge this patch to the next one.

> ---
> drivers/gpu/drm/i915/display/intel_psr.c | 8 ++++++++
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> 2 files changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index b3c7eef53bf3..bf0b741d3243 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -534,6 +534,12 @@ transcoder_has_psr2(struct drm_i915_private *dev_priv, enum transcoder trans)
> return trans == TRANSCODER_EDP;
> }
>
> +static void tgl_disallow_dc3co_on_psr2_exit(struct drm_i915_private *dev_priv)
> +{
> + if (!dev_priv->psr.dc3co_exitline)
> + return;
> +}
> +
> static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
> struct intel_crtc_state *crtc_state)
> {
> @@ -746,6 +752,7 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
> dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state);
> dev_priv->psr.busy_frontbuffer_bits = 0;
> dev_priv->psr.pipe = to_intel_crtc(crtc_state->base.crtc)->pipe;
> + dev_priv->psr.dc3co_exitline = crtc_state->dc3co_exitline;
> dev_priv->psr.transcoder = crtc_state->cpu_transcoder;
>
> /*
> @@ -829,6 +836,7 @@ static void intel_psr_exit(struct drm_i915_private *dev_priv)
> }
>
> if (dev_priv->psr.psr2_enabled) {
> + tgl_disallow_dc3co_on_psr2_exit(dev_priv);
> val = I915_READ(EDP_PSR2_CTL(dev_priv->psr.transcoder));
> WARN_ON(!(val & EDP_PSR2_ENABLE));
> val &= ~EDP_PSR2_ENABLE;
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index cddc98ea9965..c3aba078262f 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -501,6 +501,7 @@ struct i915_psr {
> bool sink_not_reliable;
> bool irq_aux_error;
> u16 su_x_granularity;
> + u32 dc3co_exitline;
> };
>
> #define QUIRK_LVDS_SSC_DISABLE (1<<1)
> --
> 2.21.0
>