drm/omap: dsi: drop custom enable_te() API

Instead of using the custom enable_te() API, this automatically
enables/disables TE core support when a matching packet is sent
to the panel.
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/20201215104657.802264-26-tomi.valkeinen@ti.com

drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c

@@ -768,7 +768,6 @@ static int dsicm_update(struct omap_dss_device *dssdev,
 
 static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
 {
-	struct omap_dss_device *src = ddata->src;
 	struct mipi_dsi_device *dsi = ddata->dsi;
 	int r;
 
@@ -777,8 +776,6 @@ static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
 	else
 		r = mipi_dsi_dcs_set_tear_off(dsi);
 
-	src->ops->dsi.enable_te(src, enable);
-
 	/* possible panel bug */
 	msleep(100);
 

drivers/gpu/drm/omapdrm/dss/dsi.c

@@ -4107,10 +4107,8 @@ static void dsi_display_disable(struct omap_dss_device *dssdev,
 	mutex_unlock(&dsi->lock);
 }
 
-static int dsi_enable_te(struct omap_dss_device *dssdev, bool enable)
+static int dsi_enable_te(struct dsi_data *dsi, bool enable)
 {
-	struct dsi_data *dsi = to_dsi_data(dssdev);
-
 	dsi->te_enabled = enable;
 
 	if (dsi->te_gpio) {
@@ -4720,6 +4718,7 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host,
 {
 	struct dsi_data *dsi = host_to_omap(host);
 	struct omap_dss_device *dssdev = &dsi->output;
+	int r;
 
 	if (!!(msg->flags & MIPI_DSI_MSG_USE_LPM) != dsi->in_lp_mode)
 		dsi_vc_enable_hs(dssdev, msg->channel,
@@ -4735,16 +4734,35 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host,
 	case MIPI_DSI_DCS_LONG_WRITE:
 	case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
 	case MIPI_DSI_NULL_PACKET:
-		return dsi_vc_write_common(dssdev, msg);
+		r = dsi_vc_write_common(dssdev, msg);
+		break;
 	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);
+		r = dsi_vc_generic_read(dssdev, msg);
+		break;
 	case MIPI_DSI_DCS_READ:
-		return dsi_vc_dcs_read(dssdev, msg);
+		r = dsi_vc_dcs_read(dssdev, msg);
+		break;
+	default:
+		r = -EINVAL;
+		break;
 	}
 
-	return -EINVAL;
+	if (r < 0)
+		return r;
+
+	if (msg->type == MIPI_DSI_DCS_SHORT_WRITE ||
+	    msg->type == MIPI_DSI_DCS_SHORT_WRITE_PARAM) {
+		u8 cmd = ((u8 *)msg->tx_buf)[0];
+
+		if (cmd == MIPI_DCS_SET_TEAR_OFF)
+			dsi_enable_te(dsi, false);
+		else if (cmd == MIPI_DCS_SET_TEAR_ON)
+			dsi_enable_te(dsi, true);
+	}
+
+	return 0;
 }
 
 static int dsi_get_clocks(struct dsi_data *dsi)
@@ -4791,8 +4809,6 @@ static const struct omap_dss_device_ops dsi_ops = {
 		.disable_video_output = dsi_disable_video_output,
 
 		.update = dsi_update,
-
-		.enable_te = dsi_enable_te,
 	},
 };
 

drivers/gpu/drm/omapdrm/dss/omapdss.h

@@ -291,8 +291,6 @@ struct omapdss_dsi_ops {
 	int (*set_config)(struct omap_dss_device *dssdev,
 			const struct omap_dss_dsi_config *cfg);
 
-	int (*enable_te)(struct omap_dss_device *dssdev, bool enable);
-
 	int (*update)(struct omap_dss_device *dssdev, int channel,
 			void (*callback)(int, void *), void *data);