diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 43 |
1 files changed, 39 insertions, 4 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index b78cbe74dad..3d13ca6e257 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -168,6 +168,9 @@ static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_h uint16_t *r_base, *g_base, *b_base; int i; + if (helper->funcs->gamma_get == NULL) + return; + r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; @@ -284,13 +287,27 @@ EXPORT_SYMBOL(drm_fb_helper_debug_leave); */ bool drm_fb_helper_restore_fbdev_mode(struct drm_fb_helper *fb_helper) { + struct drm_device *dev = fb_helper->dev; + struct drm_plane *plane; bool error = false; - int i, ret; + int i; + + drm_warn_on_modeset_not_all_locked(dev); - drm_warn_on_modeset_not_all_locked(fb_helper->dev); + list_for_each_entry(plane, &dev->mode_config.plane_list, head) + drm_plane_force_disable(plane); for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; + struct drm_crtc *crtc = mode_set->crtc; + int ret; + + if (crtc->funcs->cursor_set) { + ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); + if (ret) + error = true; + } + ret = drm_mode_set_config_internal(mode_set); if (ret) error = true; @@ -583,6 +600,14 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, return 0; } + /* + * The driver really shouldn't advertise pseudo/directcolor + * visuals if it can't deal with the palette. + */ + if (WARN_ON(!fb_helper->funcs->gamma_set || + !fb_helper->funcs->gamma_get)) + return -EINVAL; + pindex = regno; if (fb->bits_per_pixel == 16) { @@ -626,12 +651,19 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; + struct drm_device *dev = fb_helper->dev; struct drm_crtc_helper_funcs *crtc_funcs; u16 *red, *green, *blue, *transp; struct drm_crtc *crtc; int i, j, rc = 0; int start; + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; crtc_funcs = crtc->helper_private; @@ -654,10 +686,13 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); if (rc) - return rc; + goto out; } - crtc_funcs->load_lut(crtc); + if (crtc_funcs->load_lut) + crtc_funcs->load_lut(crtc); } + out: + drm_modeset_unlock_all(dev); return rc; } EXPORT_SYMBOL(drm_fb_helper_setcmap); |