diff options
author | Lyude Paul <lyude@redhat.com> | 2019-01-15 15:08:00 -0500 |
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committer | Lyude Paul <lyude@redhat.com> | 2019-01-15 16:10:43 -0500 |
commit | 96550555a78ca3c9fda4b358549a5622810fe32c (patch) | |
tree | 3eab6ac11b6e0554506588b61b91d506997deb02 /drivers/gpu/drm/i915/intel_tv.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_tv.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_tv.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c index 860f306a23ba..9bbe35a0f0f2 100644 --- a/drivers/gpu/drm/i915/intel_tv.c +++ b/drivers/gpu/drm/i915/intel_tv.c @@ -870,7 +870,7 @@ intel_tv_get_config(struct intel_encoder *encoder, pipe_config->base.adjusted_mode.crtc_clock = pipe_config->port_clock; } -static bool +static int intel_tv_compute_config(struct intel_encoder *encoder, struct intel_crtc_state *pipe_config, struct drm_connector_state *conn_state) @@ -880,10 +880,10 @@ intel_tv_compute_config(struct intel_encoder *encoder, &pipe_config->base.adjusted_mode; if (!tv_mode) - return false; + return -EINVAL; if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) - return false; + return -EINVAL; pipe_config->output_format = INTEL_OUTPUT_FORMAT_RGB; adjusted_mode->crtc_clock = tv_mode->clock; @@ -898,7 +898,7 @@ intel_tv_compute_config(struct intel_encoder *encoder, * or whether userspace is doing something stupid. */ - return true; + return 0; } static void |