Commit e83967c3 authored by Aradhya Bhatia's avatar Aradhya Bhatia Committed by Dmitry Baryshkov
Browse files

drm/mipi-dsi: Add helper to find input format 



Add a helper API that can be used by the DSI hosts to find the required
input bus format for the given output dsi pixel format.

Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: default avatarTomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: default avatarAradhya Bhatia <a-bhatia1@ti.com>
Signed-off-by: default avatarAradhya Bhatia <aradhya.bhatia@linux.dev>
Link: https://lore.kernel.org/r/20250329113925.68204-8-aradhya.bhatia@linux.dev


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent 7ad8b344

drivers/gpu/drm/drm_mipi_dsi.c

+37 −0
Original line number Diff line number Diff line
@@ -36,6 +36,8 @@ 
#include <drm/drm_mipi_dsi.h>

#include <drm/drm_print.h>



#include <linux/media-bus-format.h>



#include <video/mipi_display.h>



/**
@@ -870,6 +872,41 @@ ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params, 
}

EXPORT_SYMBOL(mipi_dsi_generic_read);



/**

 * drm_mipi_dsi_get_input_bus_fmt() - Get the required MEDIA_BUS_FMT_* based

 *				      input pixel format for a given DSI output

 *				      pixel format

 * @dsi_format: pixel format that a DSI host needs to output

 *

 * Various DSI hosts can use this function during their

 * &drm_bridge_funcs.atomic_get_input_bus_fmts operation to ascertain

 * the MEDIA_BUS_FMT_* pixel format required as input.

 *

 * RETURNS:

 * a 32-bit MEDIA_BUS_FMT_* value on success or 0 in case of failure.

 */

u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format)

{

	switch (dsi_format) {

	case MIPI_DSI_FMT_RGB888:

		return MEDIA_BUS_FMT_RGB888_1X24;



	case MIPI_DSI_FMT_RGB666:

		return MEDIA_BUS_FMT_RGB666_1X24_CPADHI;



	case MIPI_DSI_FMT_RGB666_PACKED:

		return MEDIA_BUS_FMT_RGB666_1X18;



	case MIPI_DSI_FMT_RGB565:

		return MEDIA_BUS_FMT_RGB565_1X16;



	default:

		/* Unsupported DSI Format */

		return 0;

	}

}

EXPORT_SYMBOL(drm_mipi_dsi_get_input_bus_fmt);



/**

 * mipi_dsi_dcs_write_buffer() - transmit a DCS command with payload

 * @dsi: DSI peripheral device

include/drm/drm_mipi_dsi.h

+1 −0
Original line number Diff line number Diff line
@@ -293,6 +293,7 @@ void mipi_dsi_generic_write_multi(struct mipi_dsi_multi_context *ctx, 
				  const void *payload, size_t size);

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

			      size_t num_params, void *data, size_t size);

u32 drm_mipi_dsi_get_input_bus_fmt(enum mipi_dsi_pixel_format dsi_format);



#define mipi_dsi_msleep(ctx, delay)	\

	do {				\