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Commit 42fe1e75 authored by YoungJun Cho's avatar YoungJun Cho Committed by Thierry Reding
Browse files

drm/dsi: Implement some standard DCS commands 



Add helpers for the {enter,exit}_sleep_mode, set_display_{on,off} and
set_tear_{on,off} DCS commands.

Signed-off-by: default avatarYoungJun Cho <yj44.cho@samsung.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
[treding: kerneldoc and other minor cleanup]
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 550ab848

drivers/gpu/drm/drm_mipi_dsi.c

+118 −0
Original line number Original line Diff line number Diff line
@@ -556,6 +556,124 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, 
}

}

EXPORT_SYMBOL(mipi_dsi_dcs_read);

EXPORT_SYMBOL(mipi_dsi_dcs_read);





/**

 * mipi_dsi_dcs_enter_sleep_mode() - disable all unnecessary blocks inside the

 *    display module except interface communication

 * @dsi: DSI peripheral device

 *

 * Return: 0 on success or a negative error code on failure.

 */

int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_ENTER_SLEEP_MODE, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_enter_sleep_mode);



/**

 * mipi_dsi_dcs_exit_sleep_mode() - enable all blocks inside the display

 *    module

 * @dsi: DSI peripheral device

 *

 * Return: 0 on success or a negative error code on failure.

 */

int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_EXIT_SLEEP_MODE, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_exit_sleep_mode);



/**

 * mipi_dsi_dcs_set_display_off() - stop displaying the image data on the

 *    display device

 * @dsi: DSI peripheral device

 *

 * Return: 0 on success or a negative error code on failure.

 */

int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_OFF, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_set_display_off);



/**

 * mipi_dsi_dcs_set_display_on() - start displaying the image data on the

 *    display device

 * @dsi: DSI peripheral device

 *

 * Return: 0 on success or a negative error code on failure

 */

int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_ON, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_set_display_on);



/**

 * mipi_dsi_dcs_set_tear_off() - turn off the display module's Tearing Effect

 *    output signal on the TE signal line

 * @dsi: DSI peripheral device

 *

 * Return: 0 on success or a negative error code on failure

 */

int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi)

{

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_OFF, NULL, 0);

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_off);



/**

 * mipi_dsi_dcs_set_tear_on() - turn on the display module's Tearing Effect

 *    output signal on the TE signal line.

 * @dsi: DSI peripheral device

 * @mode: the Tearing Effect Output Line mode

 *

 * Return: 0 on success or a negative error code on failure

 */

int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,

			     enum mipi_dsi_dcs_tear_mode mode)

{

	u8 value = mode;

	ssize_t err;



	err = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_TEAR_ON, &value,

				 sizeof(value));

	if (err < 0)

		return err;



	return 0;

}

EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);



static int mipi_dsi_drv_probe(struct device *dev)

static int mipi_dsi_drv_probe(struct device *dev)

{

{

	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);

	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);

include/drm/drm_mipi_dsi.h

+19 −0
Original line number Original line Diff line number Diff line
@@ -161,12 +161,31 @@ ssize_t mipi_dsi_generic_write(struct mipi_dsi_device *dsi, const void *payload, 
ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,

ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,

			      size_t num_params, void *data, size_t size);

			      size_t num_params, void *data, size_t size);





/**

 * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode

 * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking

 *    information only

 * @MIPI_DSI_DCS_TEAR_MODE_VHBLANK : the TE output line consists of both

 *    V-Blanking and H-Blanking information

 */

enum mipi_dsi_dcs_tear_mode {

	MIPI_DSI_DCS_TEAR_MODE_VBLANK,

	MIPI_DSI_DCS_TEAR_MODE_VHBLANK,

};



ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,

ssize_t mipi_dsi_dcs_write_buffer(struct mipi_dsi_device *dsi,

				  const void *data, size_t len);

				  const void *data, size_t len);

ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,

ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, u8 cmd,

			   const void *data, size_t len);

			   const void *data, size_t len);

ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,

ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,

			  size_t len);

			  size_t len);

int mipi_dsi_dcs_enter_sleep_mode(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_exit_sleep_mode(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_set_display_off(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_set_display_on(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);

int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,

			     enum mipi_dsi_dcs_tear_mode mode);





/**

/**

 * struct mipi_dsi_driver - DSI driver

 * struct mipi_dsi_driver - DSI driver