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| author | Sebastian Reichel <sebastian.reichel@collabora.com> | 2020-12-15 12:45:38 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2020-12-15 16:08:19 +0200 |
| commit | 9e8d3b92c24d3cd550d790a82e2f4730fc2f6295 (patch) | |
| tree | f0ae1bfbbd1a1b8ba920e6460f0eaaffd91a830d | |
| parent | ee0c365c9ed501776c38705490f3748d3f5d5e09 (diff) | |
drm/omap: dsi: add generic transfer function
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@collabora.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201215104657.802264-6-tomi.valkeinen@ti.com
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/dsi.c | 54 | ||||
| -rw-r--r-- | drivers/gpu/drm/omapdrm/dss/omapdss.h | 3 |
2 files changed, 57 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index 91c8c1f29ae2..1e73fb175bfe 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -4840,6 +4840,58 @@ 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) +{ + /* + * TODO: no_sync can be used to optimize performance by sending e.g. + * column and page information without syncing in between. It's not + * absolutely required, so postpone this feature for now. + */ + 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); + 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); + 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); + case MIPI_DSI_DCS_READ: + return dsi_vc_dcs_read(dssdev, msg->channel, + ((u8 *)msg->tx_buf)[0], + msg->rx_buf, msg->rx_len); + 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) { @@ -4894,6 +4946,8 @@ 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 3e01711a4197..b772101373c3 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -311,6 +311,9 @@ 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); + 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, |