diff options
author | Dave Airlie <airlied@redhat.com> | 2008-06-02 14:04:41 +1000 |
---|---|---|
committer | Dave Airlie <airlied@redhat.com> | 2008-06-02 14:04:41 +1000 |
commit | 4e7b24639808e5e1e2c05143028db1a3bc2812e9 (patch) | |
tree | ba16702759e87caa1119a46a1e18d27048c9667d /linux-core/drm_crtc.c | |
parent | eba6cdc936cb33d929997ccb9bade6f75bb40670 (diff) |
drm: add functions to get/set gamma ramps
Diffstat (limited to 'linux-core/drm_crtc.c')
-rw-r--r-- | linux-core/drm_crtc.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c index 73c7f2a3..7746fd50 100644 --- a/linux-core/drm_crtc.c +++ b/linux-core/drm_crtc.c @@ -279,6 +279,11 @@ void drm_crtc_cleanup(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; + if (crtc->gamma_store) { + kfree(crtc->gamma_store); + crtc->gamma_store = NULL; + } + drm_idr_put(dev, crtc->id); list_del(&crtc->head); dev->mode_config.num_crtc--; @@ -896,6 +901,7 @@ int drm_mode_getcrtc(struct drm_device *dev, crtc_resp->x = crtc->x; crtc_resp->y = crtc->y; + crtc_resp->gamma_size = crtc->gamma_size; if (crtc->fb) crtc_resp->fb_id = crtc->fb->id; @@ -2070,3 +2076,112 @@ void drm_mode_connector_detach_encoder(struct drm_connector *connector, } } EXPORT_SYMBOL(drm_mode_connector_detach_encoder); + +bool drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, + int gamma_size) +{ + crtc->gamma_size = gamma_size; + + crtc->gamma_store = kzalloc(gamma_size * sizeof(uint16_t) * 3, GFP_KERNEL); + if (!crtc->gamma_store) { + crtc->gamma_size = 0; + return false; + } + + return true; +} +EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); + +int drm_mode_gamma_set_ioctl(struct drm_device *dev, + void *data, struct drm_file *file_priv) +{ + struct drm_mode_crtc_lut *crtc_lut = data; + struct drm_crtc *crtc; + void *r_base, *g_base, *b_base; + int size; + int ret = 0; + + mutex_lock(&dev->mode_config.mutex); + crtc = idr_find(&dev->mode_config.crtc_idr, crtc_lut->crtc_id); + if (!crtc || (crtc->id != crtc_lut->crtc_id)) { + ret = -EINVAL; + goto out; + } + + /* memcpy into gamma store */ + if (crtc_lut->gamma_size != crtc->gamma_size) { + ret = -EINVAL; + goto out; + } + + size = crtc_lut->gamma_size * (sizeof(uint16_t)); + r_base = crtc->gamma_store; + if (copy_from_user(r_base, (void __user *)(unsigned long)crtc_lut->red, size)) { + ret = -EFAULT; + goto out; + } + + g_base = r_base + size; + if (copy_from_user(g_base, (void __user *)(unsigned long)crtc_lut->green, size)) { + ret = -EFAULT; + goto out; + } + + b_base = g_base + size; + if (copy_from_user(b_base, (void __user *)(unsigned long)crtc_lut->blue, size)) { + ret = -EFAULT; + goto out; + } + + crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size); + +out: + mutex_unlock(&dev->mode_config.mutex); + return ret; + +} + +int drm_mode_gamma_get_ioctl(struct drm_device *dev, + void *data, struct drm_file *file_priv) +{ + struct drm_mode_crtc_lut *crtc_lut = data; + struct drm_crtc *crtc; + void *r_base, *g_base, *b_base; + int size; + int ret = 0; + + mutex_lock(&dev->mode_config.mutex); + crtc = idr_find(&dev->mode_config.crtc_idr, crtc_lut->crtc_id); + if (!crtc || (crtc->id != crtc_lut->crtc_id)) { + ret = -EINVAL; + goto out; + } + + /* memcpy into gamma store */ + if (crtc_lut->gamma_size != crtc->gamma_size) { + ret = -EINVAL; + goto out; + } + + size = crtc_lut->gamma_size * (sizeof(uint16_t)); + r_base = crtc->gamma_store; + if (copy_to_user((void __user *)(unsigned long)crtc_lut->red, r_base, size)) { + ret = -EFAULT; + goto out; + } + + g_base = r_base + size; + if (copy_to_user((void __user *)(unsigned long)crtc_lut->green, g_base, size)) { + ret = -EFAULT; + goto out; + } + + b_base = g_base + size; + if (copy_to_user((void __user *)(unsigned long)crtc_lut->blue, b_base, size)) { + ret = -EFAULT; + goto out; + } +out: + mutex_unlock(&dev->mode_config.mutex); + return ret; +} |