diff options
Diffstat (limited to 'drivers/gpu/drm/arm')
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_drv.c | 128 | ||||
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_hw.h | 5 |
2 files changed, 132 insertions, 1 deletions
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index 34eec1a22428..90214851637f 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -37,6 +37,7 @@ #include "malidp_hw.h" #define MALIDP_CONF_VALID_TIMEOUT 250 +#define AFBC_HEADER_SIZE 16 static void malidp_write_gamma_table(struct malidp_hw_device *hwdev, u32 data[MALIDP_COEFFTAB_NUM_COEFFS]) @@ -258,8 +259,133 @@ static const struct drm_mode_config_helper_funcs malidp_mode_config_helpers = { .atomic_commit_tail = malidp_atomic_commit_tail, }; +static bool +malidp_verify_afbc_framebuffer_caps(struct drm_device *dev, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + const struct drm_format_info *info; + + if ((mode_cmd->modifier[0] >> 56) != DRM_FORMAT_MOD_VENDOR_ARM) { + DRM_DEBUG_KMS("Unknown modifier (not Arm)\n"); + return false; + } + + if (mode_cmd->modifier[0] & + ~DRM_FORMAT_MOD_ARM_AFBC(AFBC_MOD_VALID_BITS)) { + DRM_DEBUG_KMS("Unsupported modifiers\n"); + return false; + } + + info = drm_get_format_info(dev, mode_cmd); + if (!info) { + DRM_DEBUG_KMS("Unable to get the format information\n"); + return false; + } + + if (info->num_planes != 1) { + DRM_DEBUG_KMS("AFBC buffers expect one plane\n"); + return false; + } + + if (mode_cmd->offsets[0] != 0) { + DRM_DEBUG_KMS("AFBC buffers' plane offset should be 0\n"); + return false; + } + + switch (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) { + case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: + if ((mode_cmd->width % 16) || (mode_cmd->height % 16)) { + DRM_DEBUG_KMS("AFBC buffers must be aligned to 16 pixels\n"); + return false; + } + break; + default: + DRM_DEBUG_KMS("Unsupported AFBC block size\n"); + return false; + } + + return true; +} + +static bool +malidp_verify_afbc_framebuffer_size(struct drm_device *dev, + struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + int n_superblocks = 0; + const struct drm_format_info *info; + struct drm_gem_object *objs = NULL; + u32 afbc_superblock_size = 0, afbc_superblock_height = 0; + u32 afbc_superblock_width = 0, afbc_size = 0; + + switch (mode_cmd->modifier[0] & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) { + case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16: + afbc_superblock_height = 16; + afbc_superblock_width = 16; + break; + default: + DRM_DEBUG_KMS("AFBC superblock size is not supported\n"); + return false; + } + + info = drm_get_format_info(dev, mode_cmd); + + n_superblocks = (mode_cmd->width / afbc_superblock_width) * + (mode_cmd->height / afbc_superblock_height); + + afbc_superblock_size = info->cpp[0] * afbc_superblock_width * + afbc_superblock_height; + + afbc_size = ALIGN(n_superblocks * AFBC_HEADER_SIZE, 128); + + if (mode_cmd->width * info->cpp[0] != mode_cmd->pitches[0]) { + DRM_DEBUG_KMS("Invalid value of pitch (=%u) should be same as width (=%u) * cpp (=%u)\n", + mode_cmd->pitches[0], mode_cmd->width, info->cpp[0]); + return false; + } + + objs = drm_gem_object_lookup(file, mode_cmd->handles[0]); + if (!objs) { + DRM_DEBUG_KMS("Failed to lookup GEM object\n"); + return false; + } + + if (objs->size < afbc_size) { + DRM_DEBUG_KMS("buffer size (%zu) too small for AFBC buffer size = %u\n", + objs->size, afbc_size); + drm_gem_object_put_unlocked(objs); + return false; + } + + drm_gem_object_put_unlocked(objs); + + return true; +} + +static bool +malidp_verify_afbc_framebuffer(struct drm_device *dev, struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + if (malidp_verify_afbc_framebuffer_caps(dev, mode_cmd)) + return malidp_verify_afbc_framebuffer_size(dev, file, mode_cmd); + + return false; +} + +struct drm_framebuffer * +malidp_fb_create(struct drm_device *dev, struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + if (mode_cmd->modifier[0]) { + if (!malidp_verify_afbc_framebuffer(dev, file, mode_cmd)) + return ERR_PTR(-EINVAL); + } + + return drm_gem_fb_create(dev, file, mode_cmd); +} + static const struct drm_mode_config_funcs malidp_mode_config_funcs = { - .fb_create = drm_gem_fb_create, + .fb_create = malidp_fb_create, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, }; diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h index 3ab133d49bba..40155e2ea9d9 100644 --- a/drivers/gpu/drm/arm/malidp_hw.h +++ b/drivers/gpu/drm/arm/malidp_hw.h @@ -388,4 +388,9 @@ static inline void malidp_se_set_enh_coeffs(struct malidp_hw_device *hwdev) #define MALIDP_GAMMA_LUT_SIZE 4096 +#define AFBC_MOD_VALID_BITS (AFBC_FORMAT_MOD_BLOCK_SIZE_MASK | \ + AFBC_FORMAT_MOD_YTR | AFBC_FORMAT_MOD_SPLIT | \ + AFBC_FORMAT_MOD_SPARSE | AFBC_FORMAT_MOD_CBR | \ + AFBC_FORMAT_MOD_TILED | AFBC_FORMAT_MOD_SC) + #endif /* __MALIDP_HW_H__ */ |