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| author |   Lyude Paul <lyude@redhat.com> | 2019-01-15 15:08:00 -0500 |
|---|---|---|
| committer | Lyude Paul <lyude@redhat.com> | 2019-01-15 16:10:43 -0500 |
| commit | 96550555a78ca3c9fda4b358549a5622810fe32c (patch) | |
| tree | 3eab6ac11b6e0554506588b61b91d506997deb02 /drivers/gpu/drm/i915/intel_lvds.c | |
| parent | staging/vboxvideo: Don't set FBINFO_MISC_ALWAYS_SETPAR (diff) | |
| download | linux-dev-96550555a78ca3c9fda4b358549a5622810fe32c.tar.xz linux-dev-96550555a78ca3c9fda4b358549a5622810fe32c.zip | |
drm/i915: Pass down rc in intel_encoder->compute_config()
Something that I completely missed when implementing the new MST VCPI
atomic helpers is that with those helpers, there's technically a chance
of us having to grab additional modeset locks in ->compute_config() and
furthermore, that means we have the potential to hit a normal modeset
deadlock. However, because ->compute_config() only returns a bool this
means we can't return -EDEADLK when we need to drop locks and try again
which means we end up just failing the atomic check permanently. Whoops.
So, fix this by modifying ->compute_config() to pass down an actual
error code instead of a bool so that the atomic check can be restarted
on modeset deadlocks.
Thanks to Ville Syrjälä for pointing this out!
Changes since v1:
* Add some newlines
* Return only -EINVAL from hsw_crt_compute_config()
* Propogate return code from intel_dp_compute_dsc_params()
* Change all of the intel_dp_compute_link_config*() variants
* Don't miss if (hdmi_port_clock_valid()) branch in
intel_hdmi_compute_config()
Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Fixes: eceae1472467 ("drm/dp_mst: Start tracking per-port VCPI allocations")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109320
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190115200800.3121-1-lyude@redhat.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lvds.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lvds.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c index e6c5d985ea0a..3377d813dbb3 100644 --- a/drivers/gpu/drm/i915/intel_lvds.c +++ b/drivers/gpu/drm/i915/intel_lvds.c @@ -379,9 +379,9 @@ intel_lvds_mode_valid(struct drm_connector *connector, return MODE_OK; } -static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, - struct intel_crtc_state *pipe_config, - struct drm_connector_state *conn_state) +static int intel_lvds_compute_config(struct intel_encoder *intel_encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state) { struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev); struct intel_lvds_encoder *lvds_encoder = @@ -395,7 +395,7 @@ static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, /* Should never happen!! */ if (INTEL_GEN(dev_priv) < 4 && intel_crtc->pipe == 0) { DRM_ERROR("Can't support LVDS on pipe A\n"); - return false; + return -EINVAL; } if (lvds_encoder->a3_power == LVDS_A3_POWER_UP) @@ -421,7 +421,7 @@ static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, adjusted_mode); if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) - return false; + return -EINVAL; if (HAS_PCH_SPLIT(dev_priv)) { pipe_config->has_pch_encoder = true; @@ -440,7 +440,7 @@ static bool intel_lvds_compute_config(struct intel_encoder *intel_encoder, * user's requested refresh rate. */ - return true; + return 0; } static enum drm_connector_status |