diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-04-03 11:33:00 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-04-06 11:21:43 +0300 |
| commit | ca659e0e3cda69c5e8bbb7038adad30442a8ce39 (patch) | |
| tree | 775d2cb0e17d3d49d2b005ed7409e2fe3a3e6ff6 /drivers/gpu/drm | |
| parent | 9c79e0b1d096c06e4b012a32dddb04be0ce9716e (diff) | |
| download | linux-ca659e0e3cda69c5e8bbb7038adad30442a8ce39.tar.xz | |
drm: Add explicit acquire ctx handling around ->gamma_set
Just the groundwork to prepare for adding the acquire cxt parameter to
the ->gamma_set hook. Again we need a temporary hack to fill out
mode_config.acquire_ctx until the atomic helpers are switched over.
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-12-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/drm_color_mgmt.c | 33 |
1 files changed, 20 insertions, 13 deletions
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c index a32be59a72d1..e1b4084c3d16 100644 --- a/drivers/gpu/drm/drm_color_mgmt.c +++ b/drivers/gpu/drm/drm_color_mgmt.c @@ -218,28 +218,29 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev, struct drm_crtc *crtc; void *r_base, *g_base, *b_base; int size; + struct drm_modeset_acquire_ctx ctx; int ret = 0; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; - drm_modeset_lock_all(dev); crtc = drm_crtc_find(dev, crtc_lut->crtc_id); - if (!crtc) { - ret = -ENOENT; - goto out; - } + if (!crtc) + return -ENOENT; - if (crtc->funcs->gamma_set == NULL) { - ret = -ENOSYS; - goto out; - } + if (crtc->funcs->gamma_set == NULL) + return -ENOSYS; /* memcpy into gamma store */ - if (crtc_lut->gamma_size != crtc->gamma_size) { - ret = -EINVAL; + if (crtc_lut->gamma_size != crtc->gamma_size) + return -EINVAL; + + drm_modeset_acquire_init(&ctx, 0); + dev->mode_config.acquire_ctx = &ctx; +retry: + ret = drm_modeset_lock_all_ctx(dev, &ctx); + if (ret) goto out; - } size = crtc_lut->gamma_size * (sizeof(uint16_t)); r_base = crtc->gamma_store; @@ -263,7 +264,13 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev, ret = crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); out: - drm_modeset_unlock_all(dev); + if (ret == -EDEADLK) { + drm_modeset_backoff(&ctx); + goto retry; + } + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + return ret; } |