Hi Sebastian,
Thank you for the patch.
On Tue, Feb 25, 2020 at 12:20:37AM +0100, Sebastian Reichel wrote:
> This prepares the driver for becoming a mipi_dsi_host implementation,
> which provides a generic transfer function instead of all kind of
> different read/write functions. The implementation will become more
> elegant after unexporting the specific functions in the following
> patches.
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/omapdrm/dss/dsi.c | 52 +++++++++++++++++++++++++++
> drivers/gpu/drm/omapdrm/dss/omapdss.h | 3 ++
> 2 files changed, 55 insertions(+)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index f01e0476296d..84e2eb0b51d7 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -4836,6 +4836,56 @@ static void dsi_release_vc(struct omap_dss_device *dssdev, int channel)
> }
> }
>
> +static ssize_t omap_dsi_transfer(struct omap_dss_device *dssdev,
> + const struct mipi_dsi_msg *msg)
> +{
> + /*
> + * no_sync can be used to optimize performance by sending
> + * e.g. column and page information without syncing in
> + * between. It's not absolutley required, so postpone this
> + * feature for now.
The 80 columns limit is quite small as it is, no need to make it even
tighter :-)
> + */
> + bool no_sync = false;
> + u16 val;
> +
> + switch (msg->type) {
> + 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_LONG_WRITE:
> + if (no_sync)
> + return dsi_vc_generic_write_nosync(dssdev, msg->channel,
> + msg->tx_buf, msg->tx_len);
This uses spaces for indentation (and the result isn't aligned to ().
> + else
> + return dsi_vc_generic_write(dssdev, msg->channel,
> + msg->tx_buf, msg->tx_len);
> + case MIPI_DSI_DCS_SHORT_WRITE:
> + case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
> + case MIPI_DSI_DCS_LONG_WRITE:
> + if (no_sync)
> + return dsi_vc_dcs_write_nosync(dssdev, msg->channel,
> + msg->tx_buf, msg->tx_len);
Misaligned indentation here too.
> + else
> + return dsi_vc_dcs_write(dssdev, msg->channel,
> + msg->tx_buf, msg->tx_len);
> + case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
> + case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
> + case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
> + return dsi_vc_generic_read(dssdev, msg->channel, msg->tx_buf,
> + msg->tx_len, msg->rx_buf, msg->rx_len);
And here.
> + case MIPI_DSI_DCS_READ:
> + return dsi_vc_dcs_read(dssdev, msg->channel,
> + ((u8*) msg->tx_buf)[0],
> + msg->rx_buf, msg->rx_len);
And I think you get the message :-)
> + case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
> + val = le16_to_cpu(*((__le16*) msg->tx_buf));
> + return dsi_vc_set_max_rx_packet_size(dssdev, msg->channel, val);
> + case MIPI_DSI_NULL_PACKET:
> + return dsi_vc_send_null(to_dsi_data(dssdev), msg->channel);
> + }
> +
> + return -EINVAL;
> +}
>
> static int dsi_get_clocks(struct dsi_data *dsi)
> {
> @@ -4890,6 +4940,8 @@ static const struct omap_dss_device_ops dsi_ops = {
> .set_vc_id = dsi_set_vc_id,
> .release_vc = dsi_release_vc,
>
> + .transfer = omap_dsi_transfer,
> +
> .dcs_write = dsi_vc_dcs_write,
> .dcs_write_nosync = dsi_vc_dcs_write_nosync,
> .dcs_read = dsi_vc_dcs_read,
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> index b909b3a8c835..ea7bf0970677 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> @@ -307,6 +307,9 @@ struct omapdss_dsi_ops {
> void (*release_vc)(struct omap_dss_device *dssdev, int channel);
>
> /* data transfer */
> + ssize_t (*transfer)(struct omap_dss_device *dssdev,
> + const struct mipi_dsi_msg *msg);
Ditto. With those small issues fixed,
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> +
> int (*dcs_write)(struct omap_dss_device *dssdev, int channel,
> const u8 *data, int len);
> int (*dcs_write_nosync)(struct omap_dss_device *dssdev, int channel,
--
Regards,
Laurent Pinchart
