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Commit 02acb76d authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/dsi: Introduce packet format helpers 



Add two helpers, mipi_dsi_packet_format_is_{short,long}(), that help in
determining the format of a packet.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent d85a1609

drivers/gpu/drm/drm_mipi_dsi.c

+67 −0
Original line number Diff line number Diff line
@@ -198,6 +198,73 @@ int mipi_dsi_detach(struct mipi_dsi_device *dsi) 
}

EXPORT_SYMBOL(mipi_dsi_detach);



/**

 * mipi_dsi_packet_format_is_short - check if a packet is of the short format

 * @type: MIPI DSI data type of the packet

 *

 * Return: true if the packet for the given data type is a short packet, false

 * otherwise.

 */

bool mipi_dsi_packet_format_is_short(u8 type)

{

	switch (type) {

	case MIPI_DSI_V_SYNC_START:

	case MIPI_DSI_V_SYNC_END:

	case MIPI_DSI_H_SYNC_START:

	case MIPI_DSI_H_SYNC_END:

	case MIPI_DSI_END_OF_TRANSMISSION:

	case MIPI_DSI_COLOR_MODE_OFF:

	case MIPI_DSI_COLOR_MODE_ON:

	case MIPI_DSI_SHUTDOWN_PERIPHERAL:

	case MIPI_DSI_TURN_ON_PERIPHERAL:

	case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:

	case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:

	case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:

	case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:

	case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:

	case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:

	case MIPI_DSI_DCS_SHORT_WRITE:

	case MIPI_DSI_DCS_SHORT_WRITE_PARAM:

	case MIPI_DSI_DCS_READ:

	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:

		return true;

	}



	return false;

}

EXPORT_SYMBOL(mipi_dsi_packet_format_is_short);



/**

 * mipi_dsi_packet_format_is_long - check if a packet is of the long format

 * @type: MIPI DSI data type of the packet

 *

 * Return: true if the packet for the given data type is a long packet, false

 * otherwise.

 */

bool mipi_dsi_packet_format_is_long(u8 type)

{

	switch (type) {

	case MIPI_DSI_NULL_PACKET:

	case MIPI_DSI_BLANKING_PACKET:

	case MIPI_DSI_GENERIC_LONG_WRITE:

	case MIPI_DSI_DCS_LONG_WRITE:

	case MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20:

	case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24:

	case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16:

	case MIPI_DSI_PACKED_PIXEL_STREAM_30:

	case MIPI_DSI_PACKED_PIXEL_STREAM_36:

	case MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12:

	case MIPI_DSI_PACKED_PIXEL_STREAM_16:

	case MIPI_DSI_PACKED_PIXEL_STREAM_18:

	case MIPI_DSI_PIXEL_STREAM_3BYTE_18:

	case MIPI_DSI_PACKED_PIXEL_STREAM_24:

		return true;

	}



	return false;

}

EXPORT_SYMBOL(mipi_dsi_packet_format_is_long);



/**

 * mipi_dsi_dcs_write - send DCS write command

 * @dsi: DSI device

include/drm/drm_mipi_dsi.h

+3 −0
Original line number Diff line number Diff line
@@ -43,6 +43,9 @@ struct mipi_dsi_msg { 
	void *rx_buf;

};



bool mipi_dsi_packet_format_is_short(u8 type);

bool mipi_dsi_packet_format_is_long(u8 type);



/**

 * struct mipi_dsi_host_ops - DSI bus operations

 * @attach: attach DSI device to DSI host