In order to check whether the backend supports a specific format, an explicit list and a related helper are introduced.
They are then used to determine whether the frontend should be used for a layer, when the format is not supported by the backend. Signed-off-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com> --- drivers/gpu/drm/sun4i/sun4i_backend.c | 48 ++++++++++++++++++++++++++++++++++- drivers/gpu/drm/sun4i/sun4i_backend.h | 1 + 2 files changed, 48 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c index 274a1db6fa8e..7703ba989743 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.c +++ b/drivers/gpu/drm/sun4i/sun4i_backend.c @@ -172,6 +172,39 @@ static int sun4i_backend_drm_format_to_layer(u32 format, u32 *mode) return 0; } +static const uint32_t sun4i_backend_formats[] = { + /* RGB */ + DRM_FORMAT_ARGB4444, + DRM_FORMAT_RGBA4444, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_RGBA5551, + DRM_FORMAT_RGB565, + DRM_FORMAT_RGB888, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_BGRX8888, + DRM_FORMAT_ARGB8888, + /* YUV422 */ + DRM_FORMAT_YUYV, + DRM_FORMAT_YVYU, + DRM_FORMAT_UYVY, + DRM_FORMAT_VYUY, +}; + +bool sun4i_backend_format_is_supported(uint32_t fmt) +{ + bool found = false; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(sun4i_backend_formats); i++) { + if (sun4i_backend_formats[i] == fmt) { + found = true; + break; + } + } + + return found; +} + int sun4i_backend_update_layer_coord(struct sun4i_backend *backend, int layer, struct drm_plane *plane) { @@ -436,15 +469,28 @@ static bool sun4i_backend_plane_uses_frontend(struct drm_plane_state *state) { struct sun4i_layer *layer = plane_to_sun4i_layer(state->plane); struct sun4i_backend *backend = layer->backend; + struct drm_framebuffer *fb = state->fb; if (IS_ERR(backend->frontend)) return false; + /* + * Let's pretend that every format is either supported by the backend or + * the frontend. This is not true in practice, as some tiling modes are + * not supported by either. There is still room to check this later in + * the atomic check process. + */ + if (!sun4i_backend_format_is_supported(fb->format->format)) + return true; + /* * TODO: Don't use the frontend for x2/x4 scaling and allow RGB formats * with an alpha component then. */ - return sun4i_backend_plane_uses_scaler(state); + if (sun4i_backend_plane_uses_scaler(state)) + return true; + + return false; } static void sun4i_backend_atomic_begin(struct sunxi_engine *engine, diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.h b/drivers/gpu/drm/sun4i/sun4i_backend.h index cb6df2b690c0..a7bfc38f12bd 100644 --- a/drivers/gpu/drm/sun4i/sun4i_backend.h +++ b/drivers/gpu/drm/sun4i/sun4i_backend.h @@ -207,5 +207,6 @@ int sun4i_backend_update_layer_zpos(struct sun4i_backend *backend, int layer, struct drm_plane *plane); void sun4i_backend_disable_layer_frontend(struct sun4i_backend *backend, int layer); +bool sun4i_backend_format_is_supported(uint32_t fmt); #endif /* _SUN4I_BACKEND_H_ */ -- 2.16.2 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel