| Message ID | 20200214015038.122913-1-jose.souza@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/i915/psr: Force PSR probe only after full initialization | expand |
On Thu, Feb 13, 2020 at 05:50:38PM -0800, José Roberto de Souza wrote: > Commit 60c6a14b489b ("drm/i915/display: Force the state compute phase > once to enable PSR") was forcing the state compute too earlier > causing errors because not everything was initialized, so here > moving to i915_driver_register() when everything is ready and driver > is registering into the rest of the system. > > Also fixing the place where it disarm the force probe as during the > atomic check phase errors could happen like the ones due locking and > it would cause PSR to never be enabled if that happens. > Leaving the disarm to the atomic commit phase, intel_psr_enable() or > intel_psr_update() will be called even if the current state do not > allow PSR to be enabled. > > Fixes: 60c6a14b489b ("drm/i915/display: Force the state compute phase once to enable PSR") > Closes: https://gitlab.freedesktop.org/drm/intel/issues/1151 > Reported-by: Ross Zwisler <zwisler@google.com> Tested-by: Ross Zwisler <zwisler@google.com> > Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> > Cc: Jani Nikula <jani.nikula@intel.com> > Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Note that when applying to the current upstream/master from Linus you have one small conflict: $ cat drivers/gpu/drm/i915/i915_drv.h.rej --- drivers/gpu/drm/i915/i915_drv.h +++ drivers/gpu/drm/i915/i915_drv.h @@ -505,7 +505,7 @@ struct i915_psr { bool dc3co_enabled; u32 dc3co_exit_delay; struct delayed_work dc3co_work; - bool initially_probed; + bool force_mode_changed; }; In Linus's tree the end of that structure looks like: bool dc3co_enabled; u32 dc3co_exit_delay; struct delayed_work idle_work; bool initially_probed; }; Where the 'struct delayed_work' element is named differently.
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index b4942b6445ae..afef21c40f16 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -936,6 +936,8 @@ void intel_psr_enable(struct intel_dp *intel_dp, { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + intel_psr_force_mode_changed_set(intel_dp, false); + if (!crtc_state->has_psr) return; @@ -1096,6 +1098,8 @@ void intel_psr_update(struct intel_dp *intel_dp, struct i915_psr *psr = &dev_priv->psr; bool enable, psr2_enable; + intel_psr_force_mode_changed_set(intel_dp, false); + if (!CAN_PSR(dev_priv) || READ_ONCE(psr->dp) != intel_dp) return; @@ -1629,7 +1633,7 @@ void intel_psr_atomic_check(struct drm_connector *connector, struct drm_crtc_state *crtc_state; if (!CAN_PSR(dev_priv) || !new_state->crtc || - dev_priv->psr.initially_probed) + !dev_priv->psr.force_mode_changed) return; intel_connector = to_intel_connector(connector); @@ -1640,5 +1644,15 @@ void intel_psr_atomic_check(struct drm_connector *connector, crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc); crtc_state->mode_changed = true; - dev_priv->psr.initially_probed = true; +} + +void intel_psr_force_mode_changed_set(struct intel_dp *intel_dp, bool set) +{ + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + + if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp) || + intel_dp != dev_priv->psr.dp) + return; + + dev_priv->psr.force_mode_changed = set; } diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h index c58a1d438808..27a70468e2b9 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.h +++ b/drivers/gpu/drm/i915/display/intel_psr.h @@ -40,5 +40,6 @@ bool intel_psr_enabled(struct intel_dp *intel_dp); void intel_psr_atomic_check(struct drm_connector *connector, struct drm_connector_state *old_state, struct drm_connector_state *new_state); +void intel_psr_force_mode_changed_set(struct intel_dp *intel_dp, bool set); #endif /* __INTEL_PSR_H__ */ diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 72826e36b165..31fbd034ff82 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -56,6 +56,7 @@ #include "display/intel_hotplug.h" #include "display/intel_overlay.h" #include "display/intel_pipe_crc.h" +#include "display/intel_psr.h" #include "display/intel_sprite.h" #include "display/intel_vga.h" @@ -1348,6 +1349,8 @@ static void i915_driver_register(struct drm_i915_private *dev_priv) intel_audio_init(dev_priv); + intel_psr_force_mode_changed_set(dev_priv->psr.dp, true); + /* * Some ports require correctly set-up hpd registers for detection to * work properly (leading to ghost connected connector status), e.g. VGA diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index da509d9b8895..773f35015174 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -505,7 +505,7 @@ struct i915_psr { bool dc3co_enabled; u32 dc3co_exit_delay; struct delayed_work dc3co_work; - bool initially_probed; + bool force_mode_changed; }; #define QUIRK_LVDS_SSC_DISABLE (1<<1)
Commit 60c6a14b489b ("drm/i915/display: Force the state compute phase once to enable PSR") was forcing the state compute too earlier causing errors because not everything was initialized, so here moving to i915_driver_register() when everything is ready and driver is registering into the rest of the system. Also fixing the place where it disarm the force probe as during the atomic check phase errors could happen like the ones due locking and it would cause PSR to never be enabled if that happens. Leaving the disarm to the atomic commit phase, intel_psr_enable() or intel_psr_update() will be called even if the current state do not allow PSR to be enabled. Fixes: 60c6a14b489b ("drm/i915/display: Force the state compute phase once to enable PSR") Closes: https://gitlab.freedesktop.org/drm/intel/issues/1151 Reported-by: Ross Zwisler <zwisler@google.com> Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> --- drivers/gpu/drm/i915/display/intel_psr.c | 18 ++++++++++++++++-- drivers/gpu/drm/i915/display/intel_psr.h | 1 + drivers/gpu/drm/i915/i915_drv.c | 3 +++ drivers/gpu/drm/i915/i915_drv.h | 2 +- 4 files changed, 21 insertions(+), 3 deletions(-)