[Intel-gfx] [PATCH 2/2] drm/i915/drrs: Disable DRRS when needed in fastsets
Anshuman Gupta
anshuman.gupta at intel.com
Mon Aug 24 08:51:30 UTC 2020
On 2020-08-20 at 22:53:53 +0530, José Roberto de Souza wrote:
> Changes in the configuration could cause PSR to be compatible and
> enabled so driver must also be able to disable DRRS when doing
> fastsets.
>
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/209
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/173
> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/209
> Cc: Srinivas K <srinivasx.k at intel.com>
> Cc: Hariom Pandey <hariom.pandey at intel.com>
> Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
overall patch looks goood to me,
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 2 +-
> drivers/gpu/drm/i915/display/intel_dp.c | 84 +++++++++++++++++++-----
> drivers/gpu/drm/i915/display/intel_dp.h | 2 +
> 3 files changed, 71 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> index de5b216561d8..ff05a852417c 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -4012,7 +4012,7 @@ static void intel_ddi_update_pipe_dp(struct intel_atomic_state *state,
>
> intel_psr_update(intel_dp, crtc_state, conn_state);
> intel_dp_set_infoframes(encoder, true, crtc_state, conn_state);
> - intel_edp_drrs_enable(intel_dp, crtc_state);
> + intel_edp_drrs_update(intel_dp, crtc_state);
>
> intel_panel_update_backlight(state, encoder, crtc_state, conn_state);
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index 3bf50b1ae983..de2c9851395d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2576,9 +2576,9 @@ intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
> }
>
> static void
> -intel_dp_drrs_compute_config(struct intel_dp *intel_dp,
> - struct intel_crtc_state *pipe_config,
> - int output_bpp, bool constant_n)
> +intel_dp_compute_drrs(struct intel_dp *intel_dp,
> + struct intel_crtc_state *pipe_config,
> + int output_bpp, bool constant_n)
intel_dp_drrs_compute_config looks a better name which u have introduced in patch 1 of this series.
any reason to change the function name in second patch ?
> {
> struct intel_connector *intel_connector = intel_dp->attached_connector;
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> @@ -2586,8 +2586,8 @@ intel_dp_drrs_compute_config(struct intel_dp *intel_dp,
> /*
> * DRRS and PSR can't be enable together, so giving preference to PSR
> * as it allows more power-savings by complete shutting down display,
> - * so to guarantee this, intel_dp_drrs_compute_config() must be called
> - * after intel_psr_compute_config().
> + * so to guarantee this, intel_dp_compute_drrs() must be called after
> + * intel_psr_compute_config().
> */
> if (pipe_config->has_psr)
> return;
> @@ -2688,8 +2688,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> intel_dp_set_clock(encoder, pipe_config);
>
> intel_psr_compute_config(intel_dp, pipe_config);
> - intel_dp_drrs_compute_config(intel_dp, pipe_config, output_bpp,
> - constant_n);
> + intel_dp_compute_drrs(intel_dp, pipe_config, output_bpp, constant_n);
> intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
> intel_dp_compute_hdr_metadata_infoframe_sdp(intel_dp, pipe_config, conn_state);
>
> @@ -7736,6 +7735,15 @@ static void intel_dp_set_drrs_state(struct drm_i915_private *dev_priv,
> refresh_rate);
> }
>
> +static void
> +intel_edp_drrs_enable_locked(struct intel_dp *intel_dp)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + dev_priv->drrs.busy_frontbuffer_bits = 0;
> + dev_priv->drrs.dp = intel_dp;
> +}
> +
> /**
> * intel_edp_drrs_enable - init drrs struct if supported
> * @intel_dp: DP struct
> @@ -7752,19 +7760,34 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
> return;
>
> mutex_lock(&dev_priv->drrs.mutex);
> +
> if (dev_priv->drrs.dp) {
> - drm_dbg_kms(&dev_priv->drm, "DRRS already enabled\n");
> + drm_warn(&dev_priv->drm, "DRRS already enabled\n");
> goto unlock;
> }
>
> - dev_priv->drrs.busy_frontbuffer_bits = 0;
> -
> - dev_priv->drrs.dp = intel_dp;
> + intel_edp_drrs_enable_locked(intel_dp);
>
> unlock:
> mutex_unlock(&dev_priv->drrs.mutex);
> }
>
> +static void
> +intel_edp_drrs_disable_locked(struct intel_dp *intel_dp,
> + const struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR) {
> + int refresh;
> +
> + refresh = drm_mode_vrefresh(intel_dp->attached_connector->panel.fixed_mode);
> + intel_dp_set_drrs_state(dev_priv, crtc_state, refresh);
> + }
> +
> + dev_priv->drrs.dp = NULL;
> +}
> +
> /**
> * intel_edp_drrs_disable - Disable DRRS
> * @intel_dp: DP struct
> @@ -7785,16 +7808,45 @@ void intel_edp_drrs_disable(struct intel_dp *intel_dp,
> return;
> }
>
> - if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
> - intel_dp_set_drrs_state(dev_priv, old_crtc_state,
> - drm_mode_vrefresh(intel_dp->attached_connector->panel.fixed_mode));
> -
> - dev_priv->drrs.dp = NULL;
> + intel_edp_drrs_disable_locked(intel_dp, old_crtc_state);
> mutex_unlock(&dev_priv->drrs.mutex);
>
> cancel_delayed_work_sync(&dev_priv->drrs.work);
> }
>
> +/**
> + * intel_edp_drrs_update - Update DRRS state
> + * @intel_dp: Intel DP
> + * @crtc_state: new CRTC state
> + *
> + * This function will update DRRS states, disabling or enabling DRRS when
> + * executing fastsets. For full modeset, intel_edp_drrs_disable() and
> + * intel_edp_drrs_enable() should be called instead.
> + */
> +void
> +intel_edp_drrs_update(struct intel_dp *intel_dp,
> + const struct intel_crtc_state *crtc_state)
> +{
> + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> +
> + if (dev_priv->drrs.type != SEAMLESS_DRRS_SUPPORT)
> + return;
> +
> + mutex_lock(&dev_priv->drrs.mutex);
> +
> + /* New state matches current one? */
> + if (crtc_state->has_drrs == !!dev_priv->drrs.dp)
> + goto unlock;
> +
> + if (crtc_state->has_drrs)
> + intel_edp_drrs_enable_locked(intel_dp);
> + else
> + intel_edp_drrs_disable_locked(intel_dp, crtc_state);
> +
> +unlock:
> + mutex_unlock(&dev_priv->drrs.mutex);
> +}
> +
> static void intel_edp_drrs_downclock_work(struct work_struct *work)
> {
> struct drm_i915_private *dev_priv =
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
> index b901ab850cbd..057b2c152cbd 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
> @@ -81,6 +81,8 @@ void intel_edp_drrs_enable(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state);
> void intel_edp_drrs_disable(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state);
> +void intel_edp_drrs_update(struct intel_dp *intel_dp,
> + const struct intel_crtc_state *crtc_state);
> void intel_edp_drrs_invalidate(struct drm_i915_private *dev_priv,
> unsigned int frontbuffer_bits);
> void intel_edp_drrs_flush(struct drm_i915_private *dev_priv,
> --
> 2.28.0
>
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