diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_cma_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_cma_helper.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c index 5075fae3c4e2..2e7ef0b325e2 100644 --- a/drivers/gpu/drm/drm_fb_cma_helper.c +++ b/drivers/gpu/drm/drm_fb_cma_helper.c @@ -23,6 +23,7 @@ #include <drm/drm_crtc_helper.h> #include <drm/drm_gem_cma_helper.h> #include <drm/drm_fb_cma_helper.h> +#include <linux/dma-mapping.h> #include <linux/module.h> #define DEFAULT_FBDEFIO_DELAY_MS 50 @@ -52,7 +53,7 @@ struct drm_fbdev_cma { * will be set up automatically. dirty() is called by * drm_fb_helper_deferred_io() in process context (struct delayed_work). * - * Example fbdev deferred io code: + * Example fbdev deferred io code:: * * static int driver_fbdev_fb_dirty(struct drm_framebuffer *fb, * struct drm_file *file_priv, @@ -162,6 +163,10 @@ static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev, * drm_fb_cma_create_with_funcs() - helper function for the * &drm_mode_config_funcs ->fb_create * callback function + * @dev: DRM device + * @file_priv: drm file for the ioctl call + * @mode_cmd: metadata from the userspace fb creation request + * @funcs: vtable to be used for the new framebuffer object * * This can be used to set &drm_framebuffer_funcs for drivers that need the * dirty() callback. Use drm_fb_cma_create() if you don't need to change @@ -223,6 +228,9 @@ EXPORT_SYMBOL_GPL(drm_fb_cma_create_with_funcs); /** * drm_fb_cma_create() - &drm_mode_config_funcs ->fb_create callback function + * @dev: DRM device + * @file_priv: drm file for the ioctl call + * @mode_cmd: metadata from the userspace fb creation request * * If your hardware has special alignment or pitch requirements these should be * checked before calling this function. Use drm_fb_cma_create_with_funcs() if @@ -246,7 +254,7 @@ EXPORT_SYMBOL_GPL(drm_fb_cma_create); * This function will usually be called from the CRTC callback functions. */ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb, - unsigned int plane) + unsigned int plane) { struct drm_fb_cma *fb_cma = to_fb_cma(fb); @@ -258,10 +266,6 @@ struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb, EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj); #ifdef CONFIG_DEBUG_FS -/* - * drm_fb_cma_describe() - Helper to dump information about a single - * CMA framebuffer object - */ static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m) { struct drm_fb_cma *fb_cma = to_fb_cma(fb); @@ -279,7 +283,9 @@ static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m) /** * drm_fb_cma_debugfs_show() - Helper to list CMA framebuffer objects - * in debugfs. + * in debugfs. + * @m: output file + * @arg: private data for the callback */ int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg) { @@ -297,6 +303,12 @@ int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg) EXPORT_SYMBOL_GPL(drm_fb_cma_debugfs_show); #endif +static int drm_fb_cma_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + return dma_mmap_writecombine(info->device, vma, info->screen_base, + info->fix.smem_start, info->fix.smem_len); +} + static struct fb_ops drm_fbdev_cma_ops = { .owner = THIS_MODULE, .fb_fillrect = drm_fb_helper_sys_fillrect, @@ -307,6 +319,7 @@ static struct fb_ops drm_fbdev_cma_ops = { .fb_blank = drm_fb_helper_blank, .fb_pan_display = drm_fb_helper_pan_display, .fb_setcmap = drm_fb_helper_setcmap, + .fb_mmap = drm_fb_cma_mmap, }; static int drm_fbdev_cma_deferred_io_mmap(struct fb_info *info, |