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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
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+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
+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