From: Sebastian Reichel sebastian.reichel@collabora.com
Simplify the write related messages handling by using the functionality provided by CONFIG_DRM_MIPI_DSI.
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 --- drivers/gpu/drm/omapdrm/dss/Kconfig | 1 + drivers/gpu/drm/omapdrm/dss/dsi.c | 146 +++++++--------------------- 2 files changed, 34 insertions(+), 113 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/Kconfig b/drivers/gpu/drm/omapdrm/dss/Kconfig index 2658c521b702..fd7dfa28ce97 100644 --- a/drivers/gpu/drm/omapdrm/dss/Kconfig +++ b/drivers/gpu/drm/omapdrm/dss/Kconfig @@ -95,6 +95,7 @@ config OMAP2_DSS_SDI config OMAP2_DSS_DSI bool "DSI support" default n + select DRM_MIPI_DSI help MIPI DSI (Display Serial Interface) support.
diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index 796f9c35483e..e1595c0608f2 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -2696,97 +2696,50 @@ static int dsi_vc_send_null(struct dsi_data *dsi, int channel) return dsi_vc_send_long(dsi, channel, MIPI_DSI_NULL_PACKET, NULL, 0, 0); }
-static int dsi_vc_write_nosync_common(struct dsi_data *dsi, int channel, - const u8 *data, int len, - enum dss_dsi_content_type type) -{ - int r; - - if (len == 0) { - BUG_ON(type == DSS_DSI_CONTENT_DCS); - r = dsi_vc_send_short(dsi, channel, - MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM, 0, 0); - } else if (len == 1) { - r = dsi_vc_send_short(dsi, channel, - type == DSS_DSI_CONTENT_GENERIC ? - MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM : - MIPI_DSI_DCS_SHORT_WRITE, data[0], 0); - } else if (len == 2) { - r = dsi_vc_send_short(dsi, channel, - type == DSS_DSI_CONTENT_GENERIC ? - MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM : - MIPI_DSI_DCS_SHORT_WRITE_PARAM, - data[0] | (data[1] << 8), 0); - } else { - r = dsi_vc_send_long(dsi, channel, - type == DSS_DSI_CONTENT_GENERIC ? - MIPI_DSI_GENERIC_LONG_WRITE : - MIPI_DSI_DCS_LONG_WRITE, data, len, 0); - } - - return r; -} - -static int dsi_vc_dcs_write_nosync(struct omap_dss_device *dssdev, int channel, - const u8 *data, int len) +static int dsi_vc_write_common(struct omap_dss_device *dssdev, + const struct mipi_dsi_msg *msg) { struct dsi_data *dsi = to_dsi_data(dssdev); + struct mipi_dsi_packet packet; + int r;
- return dsi_vc_write_nosync_common(dsi, channel, data, len, - DSS_DSI_CONTENT_DCS); -} + r = mipi_dsi_create_packet(&packet, msg); + if (r < 0) + return r;
-static int dsi_vc_generic_write_nosync(struct omap_dss_device *dssdev, int channel, - const u8 *data, int len) -{ - struct dsi_data *dsi = to_dsi_data(dssdev); + if (mipi_dsi_packet_format_is_short(msg->type)) { + u16 data = packet.header[1] | (packet.header[2] << 8);
- return dsi_vc_write_nosync_common(dsi, channel, data, len, - DSS_DSI_CONTENT_GENERIC); -} + r = dsi_vc_send_short(dsi, msg->channel, msg->type, data, 0); + } else { + r = dsi_vc_send_long(dsi, msg->channel, msg->type, + msg->tx_buf, msg->tx_len, 0); + }
-static int dsi_vc_write_common(struct omap_dss_device *dssdev, - int channel, const u8 *data, int len, - enum dss_dsi_content_type type) -{ - struct dsi_data *dsi = to_dsi_data(dssdev); - int r; + if (r < 0) + return r;
- r = dsi_vc_write_nosync_common(dsi, channel, data, len, type); - if (r) - goto err; + /* + * TODO: we do not always have to do the BTA sync, for example + * we can improve performance by setting the update window + * information without sending BTA sync between the commands. + * In that case we can return early. + */
- r = dsi_vc_send_bta_sync(dssdev, channel); - if (r) - goto err; + r = dsi_vc_send_bta_sync(dssdev, msg->channel); + if (r) { + DSSERR("bta sync failed\n"); + return r; + }
/* RX_FIFO_NOT_EMPTY */ - if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) { + if (REG_GET(dsi, DSI_VC_CTRL(msg->channel), 20, 20)) { DSSERR("rx fifo not empty after write, dumping data:\n"); - dsi_vc_flush_receive_data(dsi, channel); - r = -EIO; - goto err; + dsi_vc_flush_receive_data(dsi, msg->channel); + return -EIO; }
return 0; -err: - DSSERR("dsi_vc_write_common(ch %d, cmd 0x%02x, len %d) failed\n", - channel, data[0], len); - return r; -} - -static int dsi_vc_dcs_write(struct omap_dss_device *dssdev, int channel, - const u8 *data, int len) -{ - return dsi_vc_write_common(dssdev, channel, data, len, - DSS_DSI_CONTENT_DCS); -} - -static int dsi_vc_generic_write(struct omap_dss_device *dssdev, int channel, - const u8 *data, int len) -{ - return dsi_vc_write_common(dssdev, channel, data, len, - DSS_DSI_CONTENT_GENERIC); }
static int dsi_vc_dcs_send_read_request(struct dsi_data *dsi, int channel, @@ -3008,15 +2961,6 @@ static int dsi_vc_generic_read(struct omap_dss_device *dssdev, int channel, return 0; }
-static int dsi_vc_set_max_rx_packet_size(struct omap_dss_device *dssdev, int channel, - u16 len) -{ - struct dsi_data *dsi = to_dsi_data(dssdev); - - return dsi_vc_send_short(dsi, channel, - MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0); -} - static int dsi_enter_ulps(struct dsi_data *dsi) { DECLARE_COMPLETION_ONSTACK(completion); @@ -4817,36 +4761,17 @@ 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_SET_MAXIMUM_RETURN_PACKET_SIZE: + case MIPI_DSI_NULL_PACKET: + return dsi_vc_write_common(dssdev, msg); case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM: case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM: case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM: @@ -4857,11 +4782,6 @@ static ssize_t omap_dsi_transfer(struct omap_dss_device *dssdev, 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;