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author | Liu Ying <Ying.liu@freescale.com> | 2015-11-20 16:15:30 +0800 |
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committer | Thierry Reding <treding@nvidia.com> | 2015-11-23 09:07:38 +0100 |
commit | ec26d9e9382f432225d76b3ff1c7f72e21192f7f (patch) | |
tree | 191ef1d875c31fffe41cde969512f06f69c51dc5 /include/drm/drm_mipi_dsi.h | |
parent | 8005c49d9aea74d382f474ce11afbbc7d7130bec (diff) | |
download | linux-stable-ec26d9e9382f432225d76b3ff1c7f72e21192f7f.tar.gz linux-stable-ec26d9e9382f432225d76b3ff1c7f72e21192f7f.tar.bz2 linux-stable-ec26d9e9382f432225d76b3ff1c7f72e21192f7f.zip |
drm/dsi: Add a helper to get bits per pixel of MIPI DSI pixel format
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>
Diffstat (limited to 'include/drm/drm_mipi_dsi.h')
-rw-r--r-- | include/drm/drm_mipi_dsi.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index f1d8d0dbb4f1..4396c9f22af5 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -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); |