diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-07-05 06:56:29 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-07-06 10:02:01 +0200 |
| commit | e13a058310509b22b2b45cbdd82d8797e173c3db (patch) | |
| tree | 27f10eafafffccfd27ad744a7fc7da60c7970948 /drivers/gpu/drm/i915 | |
| parent | drm/fb-helper: Push locking into restore_fbdev_mode_atomic|legacy (diff) | |
| download | linux-e13a058310509b22b2b45cbdd82d8797e173c3db.tar.xz linux-e13a058310509b22b2b45cbdd82d8797e173c3db.zip | |
drm/fb-helper: Stop using mode_config.mutex for internals
Those are now all protected using fb_helper->lock.
v2: We still need to hold mode_config.mutex right around calling
connector->fill_modes.
v3: I forgot to hold mode_config.mutex while looking at
connector->status and the mode list. Also, we need to patch up the
i915 ->initial_config callback to grab the locks it needs to inspect
the modeset state recovered from the fw.
v4: Don't reorder the probe too much (Ville).
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thierry Reding <treding@nvidia.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170705045629.31265-1-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm/i915')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_fbdev.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index 03347c6ae599..460ca0b3fb88 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -352,14 +352,20 @@ static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper, unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); int i, j; bool *save_enabled; - bool fallback = true; + bool fallback = true, ret = true; int num_connectors_enabled = 0; int num_connectors_detected = 0; + struct drm_modeset_acquire_ctx ctx; save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); if (!save_enabled) return false; + drm_modeset_acquire_init(&ctx, 0); + + while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0) + drm_modeset_backoff(&ctx); + memcpy(save_enabled, enabled, count); mask = GENMASK(count - 1, 0); conn_configured = 0; @@ -509,12 +515,14 @@ retry: bail: DRM_DEBUG_KMS("Not using firmware configuration\n"); memcpy(enabled, save_enabled, count); - kfree(save_enabled); - return false; + ret = false; } + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + kfree(save_enabled); - return true; + return ret; } static const struct drm_fb_helper_funcs intel_fb_helper_funcs = { |