From ec26d9e9382f432225d76b3ff1c7f72e21192f7f Mon Sep 17 00:00:00 2001 From: Liu Ying Date: Fri, 20 Nov 2015 16:15:30 +0800 Subject: 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 Acked-by: Thierry Reding Signed-off-by: Chris Zhong [treding@nvidia.com: add kerneldoc comment and commit message] Signed-off-by: Thierry Reding --- include/drm/drm_mipi_dsi.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'include') 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); -- cgit v1.2.3 From 6e8c9e33760d0d0f8450f5ac55d10b085e07e136 Mon Sep 17 00:00:00 2001 From: Werner Johansson Date: Fri, 30 Oct 2015 17:38:26 -0700 Subject: drm/dsi: Add Turn On/Shutdown Peripheral command helpers The MIPI_DSI_TURN_ON_PERIPHERAL and MIPI_DSI_SHUTDOWN_PERIPHERAL packets are required for some panels, for example the Panasonic VVX10F034N00. Signed-off-by: Werner Johansson Signed-off-by: Bjorn Andersson Signed-off-by: Thierry Reding --- drivers/gpu/drm/drm_mipi_dsi.c | 38 ++++++++++++++++++++++++++++++++++++++ include/drm/drm_mipi_dsi.h | 2 ++ 2 files changed, 40 insertions(+) (limited to 'include') diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 2d5ca8eec13a..6e6a9c58d404 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -365,6 +365,44 @@ int mipi_dsi_create_packet(struct mipi_dsi_packet *packet, } EXPORT_SYMBOL(mipi_dsi_create_packet); +/** + * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command + * @dsi: DSI peripheral device + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi) +{ + struct mipi_dsi_msg msg = { + .channel = dsi->channel, + .type = MIPI_DSI_SHUTDOWN_PERIPHERAL, + .tx_buf = (u8 [2]) { 0, 0 }, + .tx_len = 2, + }; + + return mipi_dsi_device_transfer(dsi, &msg); +} +EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral); + +/** + * mipi_dsi_turn_on_peripheral() - sends a Turn On Peripheral command + * @dsi: DSI peripheral device + * + * Return: 0 on success or a negative error code on failure. + */ +int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi) +{ + struct mipi_dsi_msg msg = { + .channel = dsi->channel, + .type = MIPI_DSI_TURN_ON_PERIPHERAL, + .tx_buf = (u8 [2]) { 0, 0 }, + .tx_len = 2, + }; + + return mipi_dsi_device_transfer(dsi, &msg); +} +EXPORT_SYMBOL(mipi_dsi_turn_on_peripheral); + /* * mipi_dsi_set_maximum_return_packet_size() - specify the maximum size of the * the payload in a long packet transmitted from the peripheral back to the diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 4396c9f22af5..1b3b1f8c8cdf 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -191,6 +191,8 @@ static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt) 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); +int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi); +int mipi_dsi_turn_on_peripheral(struct mipi_dsi_device *dsi); int mipi_dsi_set_maximum_return_packet_size(struct mipi_dsi_device *dsi, u16 value); -- cgit v1.2.3