diff options
| -rw-r--r-- | Documentation/gpu/todo.rst | 15 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_gem_framebuffer_helper.c | 108 | ||||
| -rw-r--r-- | include/drm/drm_framebuffer.h | 45 | ||||
| -rw-r--r-- | include/drm/drm_gem_framebuffer_helper.h | 10 |
4 files changed, 178 insertions, 0 deletions
diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 439656f55c5d..37a3a023c114 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -404,6 +404,21 @@ Contact: Laurent Pinchart, respective driver maintainers Level: Intermediate +Encode cpp properly in malidp +----------------------------- + +cpp (chars per pixel) is not encoded properly in malidp, zero is +used instead. afbc implementation needs bpp or cpp, but if it is +zero it needs to be provided elsewhere, and so the bpp field exists +in struct drm_afbc_framebuffer. + +Properly encode cpp in malidp and remove the bpp field in struct +drm_afbc_framebuffer. + +Contact: malidp maintainers + +Level: Intermediate + Core refactorings ================= diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c index 86c1907c579a..7e3982c36baa 100644 --- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c +++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c @@ -21,6 +21,13 @@ #include <drm/drm_modeset_helper.h> #include <drm/drm_simple_kms_helper.h> +#define AFBC_HEADER_SIZE 16 +#define AFBC_TH_LAYOUT_ALIGNMENT 8 +#define AFBC_HDR_ALIGN 64 +#define AFBC_SUPERBLOCK_PIXELS 256 +#define AFBC_SUPERBLOCK_ALIGNMENT 128 +#define AFBC_TH_BODY_START_ALIGNMENT 4096 + /** * DOC: overview * @@ -302,6 +309,107 @@ drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, } EXPORT_SYMBOL_GPL(drm_gem_fb_create_with_dirty); +static int drm_gem_afbc_min_size(struct drm_device *dev, + const struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_afbc_framebuffer *afbc_fb) +{ + const struct drm_format_info *info; + __u32 n_blocks, w_alignment, h_alignment, hdr_alignment; + /* remove bpp when all users properly encode cpp in drm_format_info */ + __u32 bpp; + + switch (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) { + case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: + afbc_fb->block_width = 16; + afbc_fb->block_height = 16; + break; + case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8: + afbc_fb->block_width = 32; + afbc_fb->block_height = 8; + break; + /* no user exists yet - fall through */ + case AFBC_FORMAT_MOD_BLOCK_SIZE_64x4: + case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8_64x4: + default: + DRM_DEBUG_KMS("Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n", + mode_cmd->modifier[0] + & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK); + return -EINVAL; + } + + /* tiled header afbc */ + w_alignment = afbc_fb->block_width; + h_alignment = afbc_fb->block_height; + hdr_alignment = AFBC_HDR_ALIGN; + if (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_TILED) { + w_alignment *= AFBC_TH_LAYOUT_ALIGNMENT; + h_alignment *= AFBC_TH_LAYOUT_ALIGNMENT; + hdr_alignment = AFBC_TH_BODY_START_ALIGNMENT; + } + + afbc_fb->aligned_width = ALIGN(mode_cmd->width, w_alignment); + afbc_fb->aligned_height = ALIGN(mode_cmd->height, h_alignment); + afbc_fb->offset = mode_cmd->offsets[0]; + + info = drm_get_format_info(dev, mode_cmd); + /* + * Change to always using info->cpp[0] + * when all users properly encode it + */ + bpp = info->cpp[0] ? info->cpp[0] * 8 : afbc_fb->bpp; + + n_blocks = (afbc_fb->aligned_width * afbc_fb->aligned_height) + / AFBC_SUPERBLOCK_PIXELS; + afbc_fb->afbc_size = ALIGN(n_blocks * AFBC_HEADER_SIZE, hdr_alignment); + afbc_fb->afbc_size += n_blocks * ALIGN(bpp * AFBC_SUPERBLOCK_PIXELS / 8, + AFBC_SUPERBLOCK_ALIGNMENT); + + return 0; +} + +/** + * drm_gem_fb_afbc_init() - Helper function for drivers using afbc to + * fill and validate all the afbc-specific + * struct drm_afbc_framebuffer members + * + * @dev: DRM device + * @afbc_fb: afbc-specific framebuffer + * @mode_cmd: Metadata from the userspace framebuffer creation request + * @afbc_fb: afbc framebuffer + * + * This function can be used by drivers which support afbc to complete + * the preparation of struct drm_afbc_framebuffer. It must be called after + * allocating the said struct and calling drm_gem_fb_init_with_funcs(). + * It is caller's responsibility to put afbc_fb->base.obj objects in case + * the call is unsuccessful. + * + * Returns: + * Zero on success or a negative error value on failure. + */ +int drm_gem_fb_afbc_init(struct drm_device *dev, + const struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_afbc_framebuffer *afbc_fb) +{ + const struct drm_format_info *info; + struct drm_gem_object **objs; + int ret; + + objs = afbc_fb->base.obj; + info = drm_get_format_info(dev, mode_cmd); + if (!info) + return -EINVAL; + + ret = drm_gem_afbc_min_size(dev, mode_cmd, afbc_fb); + if (ret < 0) + return ret; + + if (objs[0]->size < afbc_fb->afbc_size) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_GPL(drm_gem_fb_afbc_init); + /** * drm_gem_fb_prepare_fb() - Prepare a GEM backed framebuffer * @plane: Plane diff --git a/include/drm/drm_framebuffer.h b/include/drm/drm_framebuffer.h index c0e0256e3e98..e9f1b0e2968d 100644 --- a/include/drm/drm_framebuffer.h +++ b/include/drm/drm_framebuffer.h @@ -297,4 +297,49 @@ int drm_framebuffer_plane_width(int width, int drm_framebuffer_plane_height(int height, const struct drm_framebuffer *fb, int plane); +/** + * struct drm_afbc_framebuffer - a special afbc frame buffer object + * + * A derived class of struct drm_framebuffer, dedicated for afbc use cases. + */ +struct drm_afbc_framebuffer { + /** + * @base: base framebuffer structure. + */ + struct drm_framebuffer base; + /** + * @block_widht: width of a single afbc block + */ + u32 block_width; + /** + * @block_widht: height of a single afbc block + */ + u32 block_height; + /** + * @aligned_width: aligned frame buffer width + */ + u32 aligned_width; + /** + * @aligned_height: aligned frame buffer height + */ + u32 aligned_height; + /** + * @offset: offset of the first afbc header + */ + u32 offset; + /** + * @afbc_size: minimum size of afbc buffer + */ + u32 afbc_size; + /** + * @bpp: bpp value for this afbc buffer + * To be removed when users such as malidp + * properly store the cpp in drm_format_info. + * New users should not start using this field. + */ + u32 bpp; +}; + +#define fb_to_afbc_fb(x) container_of(x, struct drm_afbc_framebuffer, base) + #endif diff --git a/include/drm/drm_gem_framebuffer_helper.h b/include/drm/drm_gem_framebuffer_helper.h index c029c1618661..6b013154911d 100644 --- a/include/drm/drm_gem_framebuffer_helper.h +++ b/include/drm/drm_gem_framebuffer_helper.h @@ -1,6 +1,7 @@ #ifndef __DRM_GEM_FB_HELPER_H__ #define __DRM_GEM_FB_HELPER_H__ +struct drm_afbc_framebuffer; struct drm_device; struct drm_fb_helper_surface_size; struct drm_file; @@ -12,6 +13,8 @@ struct drm_plane; struct drm_plane_state; struct drm_simple_display_pipe; +#define AFBC_VENDOR_AND_TYPE_MASK GENMASK_ULL(63, 52) + struct drm_gem_object *drm_gem_fb_get_obj(struct drm_framebuffer *fb, unsigned int plane); void drm_gem_fb_destroy(struct drm_framebuffer *fb); @@ -34,6 +37,13 @@ struct drm_framebuffer * drm_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file, const struct drm_mode_fb_cmd2 *mode_cmd); +#define drm_is_afbc(modifier) \ + (((modifier) & AFBC_VENDOR_AND_TYPE_MASK) == DRM_FORMAT_MOD_ARM_AFBC(0)) + +int drm_gem_fb_afbc_init(struct drm_device *dev, + const struct drm_mode_fb_cmd2 *mode_cmd, + struct drm_afbc_framebuffer *afbc_fb); + int drm_gem_fb_prepare_fb(struct drm_plane *plane, struct drm_plane_state *state); int drm_gem_fb_simple_display_pipe_prepare_fb(struct drm_simple_display_pipe *pipe, |