diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fb_cma_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_cma_helper.c | 233 |
1 files changed, 119 insertions, 114 deletions
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c index f2ee88363015..186d00adfb5f 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_gem_cma_helper.h> #include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_fb_cma_helper.h> +#include <drm/drm_print.h> #include <linux/module.h> #define DEFAULT_FBDEFIO_DELAY_MS 50 @@ -38,11 +39,11 @@ struct drm_fbdev_cma { * Provides helper functions for creating a cma (contiguous memory allocator) * backed framebuffer. * - * drm_fb_cma_create() is used in the &drm_mode_config_funcs.fb_create + * drm_gem_fb_create() is used in the &drm_mode_config_funcs.fb_create * callback function to create a cma backed framebuffer. * * An fbdev framebuffer backed by cma is also available by calling - * drm_fbdev_cma_init(). drm_fbdev_cma_fini() tears it down. + * drm_fb_cma_fbdev_init(). drm_fb_cma_fbdev_fini() tears it down. * If the &drm_framebuffer_funcs.dirty callback is set, fb_deferred_io will be * set up automatically. &drm_framebuffer_funcs.dirty is called by * drm_fb_helper_deferred_io() in process context (&struct delayed_work). @@ -61,14 +62,14 @@ struct drm_fbdev_cma { * } * * static struct drm_framebuffer_funcs driver_fb_funcs = { - * .destroy = drm_fb_cma_destroy, - * .create_handle = drm_fb_cma_create_handle, + * .destroy = drm_gem_fb_destroy, + * .create_handle = drm_gem_fb_create_handle, * .dirty = driver_fb_dirty, * }; * * Initialize:: * - * fbdev = drm_fbdev_cma_init_with_funcs(dev, 16, + * fbdev = drm_fb_cma_fbdev_init_with_funcs(dev, 16, * dev->mode_config.num_crtc, * dev->mode_config.num_connector, * &driver_fb_funcs); @@ -80,57 +81,6 @@ static inline struct drm_fbdev_cma *to_fbdev_cma(struct drm_fb_helper *helper) return container_of(helper, struct drm_fbdev_cma, fb_helper); } -void drm_fb_cma_destroy(struct drm_framebuffer *fb) -{ - drm_gem_fb_destroy(fb); -} -EXPORT_SYMBOL(drm_fb_cma_destroy); - -int drm_fb_cma_create_handle(struct drm_framebuffer *fb, - struct drm_file *file_priv, unsigned int *handle) -{ - return drm_gem_fb_create_handle(fb, file_priv, handle); -} -EXPORT_SYMBOL(drm_fb_cma_create_handle); - -/** - * drm_fb_cma_create_with_funcs() - helper function for the - * &drm_mode_config_funcs.fb_create - * callback - * @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 - * &drm_framebuffer_funcs.dirty callback. Use drm_fb_cma_create() if you don't - * need to change &drm_framebuffer_funcs. - */ -struct drm_framebuffer *drm_fb_cma_create_with_funcs(struct drm_device *dev, - struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd, - const struct drm_framebuffer_funcs *funcs) -{ - return drm_gem_fb_create_with_funcs(dev, file_priv, mode_cmd, funcs); -} -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 - * you need to set &drm_framebuffer_funcs.dirty. - */ -struct drm_framebuffer *drm_fb_cma_create(struct drm_device *dev, - struct drm_file *file_priv, const struct drm_mode_fb_cmd2 *mode_cmd) -{ - return drm_gem_fb_create(dev, file_priv, mode_cmd); -} -EXPORT_SYMBOL_GPL(drm_fb_cma_create); - /** * drm_fb_cma_get_gem_obj() - Get CMA GEM object for framebuffer * @fb: The framebuffer @@ -181,63 +131,6 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb, } EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_addr); -/** - * drm_fb_cma_prepare_fb() - Prepare CMA framebuffer - * @plane: Which plane - * @state: Plane state attach fence to - * - * This should be set as the &struct drm_plane_helper_funcs.prepare_fb hook. - * - * This function checks if the plane FB has an dma-buf attached, extracts - * the exclusive fence and attaches it to plane state for the atomic helper - * to wait on. - * - * There is no need for cleanup_fb for CMA based framebuffer drivers. - */ -int drm_fb_cma_prepare_fb(struct drm_plane *plane, - struct drm_plane_state *state) -{ - return drm_gem_fb_prepare_fb(plane, state); -} -EXPORT_SYMBOL_GPL(drm_fb_cma_prepare_fb); - -#ifdef CONFIG_DEBUG_FS -static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m) -{ - int i; - - seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height, - (char *)&fb->format->format); - - for (i = 0; i < fb->format->num_planes; i++) { - seq_printf(m, " %d: offset=%d pitch=%d, obj: ", - i, fb->offsets[i], fb->pitches[i]); - drm_gem_cma_describe(drm_fb_cma_get_gem_obj(fb, i), m); - } -} - -/** - * drm_fb_cma_debugfs_show() - Helper to list CMA framebuffer objects - * in debugfs. - * @m: output file - * @arg: private data for the callback - */ -int drm_fb_cma_debugfs_show(struct seq_file *m, void *arg) -{ - struct drm_info_node *node = (struct drm_info_node *) m->private; - struct drm_device *dev = node->minor->dev; - struct drm_framebuffer *fb; - - mutex_lock(&dev->mode_config.fb_lock); - drm_for_each_fb(fb, dev) - drm_fb_cma_describe(fb, m); - mutex_unlock(&dev->mode_config.fb_lock); - - return 0; -} -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, @@ -364,7 +257,7 @@ drm_fbdev_cma_create(struct drm_fb_helper *helper, fbi->screen_size = size; fbi->fix.smem_len = size; - if (fbdev_cma->fb_funcs->dirty) { + if (fb->funcs->dirty) { ret = drm_fbdev_cma_defio_init(fbi, obj); if (ret) goto err_cma_destroy; @@ -386,6 +279,118 @@ static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = { }; /** + * drm_fb_cma_fbdev_init_with_funcs() - Allocate and initialize fbdev emulation + * @dev: DRM device + * @preferred_bpp: Preferred bits per pixel for the device. + * @dev->mode_config.preferred_depth is used if this is zero. + * @max_conn_count: Maximum number of connectors. + * @dev->mode_config.num_connector is used if this is zero. + * @funcs: Framebuffer functions, in particular a custom dirty() callback. + * Can be NULL. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_fb_cma_fbdev_init_with_funcs(struct drm_device *dev, + unsigned int preferred_bpp, unsigned int max_conn_count, + const struct drm_framebuffer_funcs *funcs) +{ + struct drm_fbdev_cma *fbdev_cma; + struct drm_fb_helper *fb_helper; + int ret; + + if (!preferred_bpp) + preferred_bpp = dev->mode_config.preferred_depth; + if (!preferred_bpp) + preferred_bpp = 32; + + if (!max_conn_count) + max_conn_count = dev->mode_config.num_connector; + + fbdev_cma = kzalloc(sizeof(*fbdev_cma), GFP_KERNEL); + if (!fbdev_cma) + return -ENOMEM; + + fbdev_cma->fb_funcs = funcs; + fb_helper = &fbdev_cma->fb_helper; + + drm_fb_helper_prepare(dev, fb_helper, &drm_fb_cma_helper_funcs); + + ret = drm_fb_helper_init(dev, fb_helper, max_conn_count); + if (ret < 0) { + DRM_DEV_ERROR(dev->dev, "Failed to initialize fbdev helper.\n"); + goto err_free; + } + + ret = drm_fb_helper_single_add_all_connectors(fb_helper); + if (ret < 0) { + DRM_DEV_ERROR(dev->dev, "Failed to add connectors.\n"); + goto err_drm_fb_helper_fini; + } + + ret = drm_fb_helper_initial_config(fb_helper, preferred_bpp); + if (ret < 0) { + DRM_DEV_ERROR(dev->dev, "Failed to set fbdev configuration.\n"); + goto err_drm_fb_helper_fini; + } + + return 0; + +err_drm_fb_helper_fini: + drm_fb_helper_fini(fb_helper); +err_free: + kfree(fbdev_cma); + + return ret; +} +EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_init_with_funcs); + +/** + * drm_fb_cma_fbdev_init() - Allocate and initialize fbdev emulation + * @dev: DRM device + * @preferred_bpp: Preferred bits per pixel for the device. + * @dev->mode_config.preferred_depth is used if this is zero. + * @max_conn_count: Maximum number of connectors. + * @dev->mode_config.num_connector is used if this is zero. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_fb_cma_fbdev_init(struct drm_device *dev, unsigned int preferred_bpp, + unsigned int max_conn_count) +{ + return drm_fb_cma_fbdev_init_with_funcs(dev, preferred_bpp, + max_conn_count, NULL); +} +EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_init); + +/** + * drm_fb_cma_fbdev_fini() - Teardown fbdev emulation + * @dev: DRM device + */ +void drm_fb_cma_fbdev_fini(struct drm_device *dev) +{ + struct drm_fb_helper *fb_helper = dev->fb_helper; + + if (!fb_helper) + return; + + /* Unregister if it hasn't been done already */ + if (fb_helper->fbdev && fb_helper->fbdev->dev) + drm_fb_helper_unregister_fbi(fb_helper); + + if (fb_helper->fbdev) + drm_fbdev_cma_defio_fini(fb_helper->fbdev); + + if (fb_helper->fb) + drm_framebuffer_remove(fb_helper->fb); + + drm_fb_helper_fini(fb_helper); + kfree(to_fbdev_cma(fb_helper)); +} +EXPORT_SYMBOL_GPL(drm_fb_cma_fbdev_fini); + +/** * drm_fbdev_cma_init_with_funcs() - Allocate and initializes a drm_fbdev_cma struct * @dev: DRM device * @preferred_bpp: Preferred bits per pixel for the device |