drm/dsi: Add a helper to get bits per pixel of MIPI DSI pixel format (ec26d9e9) · Commits · 戴 / test

Add a helper that can be used to obtain the number of bits per pixel corresponding to a given MIPI DSI pixel format. This is useful in bandwidth calculations, for example. Signed-off-by:

Liu Ying <Ying.Liu@freescale.com> Acked-by:

Thierry Reding <treding@nvidia.com> Signed-off-by:

Chris Zhong <zyw@rock-chips.com> [treding@nvidia.com: add kerneldoc comment and commit message] Signed-off-by:

Thierry Reding <treding@nvidia.com>

include/drm/drm_mipi_dsi.h

+25 −0

Original line number	Diff line number	Diff line
		@@ -163,6 +163,31 @@ static inline struct mipi_dsi_device to_mipi_dsi_device(struct device dev)
		return container_of(dev, struct mipi_dsi_device, dev);
		}

		/**
		* mipi_dsi_pixel_format_to_bpp - obtain the number of bits per pixel for any
		* given pixel format defined by the MIPI DSI
		* specification
		* @fmt: MIPI DSI pixel format
		*
		* Returns: The number of bits per pixel of the given pixel format.
		*/
		static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
		{
		switch (fmt) {
		case MIPI_DSI_FMT_RGB888:
		case MIPI_DSI_FMT_RGB666:
		return 24;

		case MIPI_DSI_FMT_RGB666_PACKED:
		return 18;

		case MIPI_DSI_FMT_RGB565:
		return 16;
		}

		return -EINVAL;
		}

		struct mipi_dsi_device of_find_mipi_dsi_device_by_node(struct device_node np);
		int mipi_dsi_attach(struct mipi_dsi_device *dsi);
		int mipi_dsi_detach(struct mipi_dsi_device *dsi);

Admin message