From 99d327853acbc5d6c6d4140f004f82fcd5c40ea1 Mon Sep 17 00:00:00 2001 From: Jernej Skrabec Date: Sun, 29 Sep 2024 22:04:38 +1300 Subject: drm: sun4i: de3: add format enumeration function to engine The DE3 display engine supports YUV formats in addition to RGB. Add an optional format enumeration function to the engine. Signed-off-by: Jernej Skrabec Signed-off-by: Ryan Walklin --- drivers/gpu/drm/sun4i/sunxi_engine.h | 29 ++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sunxi_engine.h b/drivers/gpu/drm/sun4i/sunxi_engine.h index ec0c4932f15c..c48cbc1aceb8 100644 --- a/drivers/gpu/drm/sun4i/sunxi_engine.h +++ b/drivers/gpu/drm/sun4i/sunxi_engine.h @@ -123,6 +123,17 @@ struct sunxi_engine_ops { */ void (*mode_set)(struct sunxi_engine *engine, const struct drm_display_mode *mode); + + /** + * @get_supported_fmts + * + * This callback is used to enumerate all supported output + * formats by the engine. They are used for bridge format + * negotiation. + * + * This function is optional. + */ + u32 *(*get_supported_fmts)(struct sunxi_engine *engine, u32 *num); }; /** @@ -215,4 +226,22 @@ sunxi_engine_mode_set(struct sunxi_engine *engine, if (engine->ops && engine->ops->mode_set) engine->ops->mode_set(engine, mode); } + +/** + * sunxi_engine_get_supported_formats - Provide array of supported formats + * @engine: pointer to the engine + * @num: pointer to variable, which will hold number of formats + * + * This list can be used for format negotiation by bridge. + */ +static inline u32 * +sunxi_engine_get_supported_formats(struct sunxi_engine *engine, u32 *num) +{ + if (engine->ops && engine->ops->get_supported_fmts) + return engine->ops->get_supported_fmts(engine, num); + + *num = 0; + + return NULL; +} #endif /* _SUNXI_ENGINE_H_ */ -- 2.35.3