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Commit 6e8c9e33 authored by Werner Johansson's avatar Werner Johansson Committed by Thierry Reding
Browse files

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: default avatarWerner Johansson <werner.johansson@sonymobile.com>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 086ceb6b

drivers/gpu/drm/drm_mipi_dsi.c

+38 −0
Original line number Diff line number Diff line
@@ -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

include/drm/drm_mipi_dsi.h

+2 −0
Original line number Diff line number Diff line
@@ -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);