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Commit 9eb491f3 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/dsi: Add DSI transfer helper 



A common pattern is starting to emerge for higher level transfer
helpers. Create a new helper that encapsulates this pattern and avoids
code duplication.

Acked-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent a52879e8

drivers/gpu/drm/drm_mipi_dsi.c

+16 −16
Original line number Diff line number Diff line
@@ -198,6 +198,20 @@ int mipi_dsi_detach(struct mipi_dsi_device *dsi) 
}

EXPORT_SYMBOL(mipi_dsi_detach);



static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,

					struct mipi_dsi_msg *msg)

{

	const struct mipi_dsi_host_ops *ops = dsi->host->ops;



	if (!ops || !ops->transfer)

		return -ENOSYS;



	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)

		msg->flags |= MIPI_DSI_MSG_USE_LPM;



	return ops->transfer(dsi->host, msg);

}



/**

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

 * @type: MIPI DSI data type of the packet
@@ -327,16 +341,12 @@ EXPORT_SYMBOL(mipi_dsi_create_packet); 
ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, const void *data,

			    size_t len)

{

	const struct mipi_dsi_host_ops *ops = dsi->host->ops;

	struct mipi_dsi_msg msg = {

		.channel = dsi->channel,

		.tx_buf = data,

		.tx_len = len

	};



	if (!ops || !ops->transfer)

		return -ENOSYS;



	switch (len) {

	case 0:

		return -EINVAL;
@@ -351,10 +361,7 @@ ssize_t mipi_dsi_dcs_write(struct mipi_dsi_device *dsi, const void *data, 
		break;

	}



	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)

		msg.flags = MIPI_DSI_MSG_USE_LPM;



	return ops->transfer(dsi->host, &msg);

	return mipi_dsi_device_transfer(dsi, &msg);

}

EXPORT_SYMBOL(mipi_dsi_dcs_write);
@@ -370,7 +377,6 @@ EXPORT_SYMBOL(mipi_dsi_dcs_write); 
ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data,

			  size_t len)

{

	const struct mipi_dsi_host_ops *ops = dsi->host->ops;

	struct mipi_dsi_msg msg = {

		.channel = dsi->channel,

		.type = MIPI_DSI_DCS_READ,
@@ -380,13 +386,7 @@ ssize_t mipi_dsi_dcs_read(struct mipi_dsi_device *dsi, u8 cmd, void *data, 
		.rx_len = len

	};



	if (!ops || !ops->transfer)

		return -ENOSYS;



	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)

		msg.flags = MIPI_DSI_MSG_USE_LPM;



	return ops->transfer(dsi->host, &msg);

	return mipi_dsi_device_transfer(dsi, &msg);

}

EXPORT_SYMBOL(mipi_dsi_dcs_read);