Revert "drm/omap: dss: Remove unused omap_dss_device operations"

This reverts commit e086558ae923 ("drm/omap: dss: Remove unused
omap_dss_device operations")

This is still needed by DSI. E.g. unloading modules without this will
cause a crash.

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/20201215104657.802264-2-tomi.valkeinen@ti.com

1 files changed, 39 insertions, 5 deletions

diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index 57e92a4d5937..a2b08d32baad 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -113,8 +113,13 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
 	bus_flags = connector->display_info.bus_flags;
 	omap_encoder_update_videomode_flags(&vm, bus_flags);
 
-	/* Set timings for the dss manager. */
+	/* Set timings for all devices in the display pipeline. */
 	dss_mgr_set_timings(output, &vm);
+
+	for (dssdev = output; dssdev; dssdev = dssdev->next) {
+		if (dssdev->ops && dssdev->ops->set_timings)
+			dssdev->ops->set_timings(dssdev, adjusted_mode);
+	}
 }
 
 static void omap_encoder_disable(struct drm_encoder *encoder)
@@ -127,10 +132,26 @@ static void omap_encoder_disable(struct drm_encoder *encoder)
 
 	/*
 	 * Disable the chain of external devices, starting at the one at the
-	 * internal encoder's output. This is used for DSI outputs only, as
-	 * dssdev->next is NULL for all other outputs.
+	 * internal encoder's output.
 	 */
 	omapdss_device_disable(dssdev->next);
+
+	/*
+	 * Disable the internal encoder. This will disable the DSS output. The
+	 * DSI is treated as an exception as DSI pipelines still use the legacy
+	 * flow where the pipeline output controls the encoder.
+	 */
+	if (dssdev->type != OMAP_DISPLAY_TYPE_DSI) {
+		if (dssdev->ops && dssdev->ops->disable)
+			dssdev->ops->disable(dssdev);
+		dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+	}
+
+	/*
+	 * Perform the post-disable operations on the chain of external devices
+	 * to complete the display pipeline disable.
+	 */
+	omapdss_device_post_disable(dssdev->next);
 }
 
 static void omap_encoder_enable(struct drm_encoder *encoder)
@@ -141,10 +162,23 @@ static void omap_encoder_enable(struct drm_encoder *encoder)
 
 	dev_dbg(dev->dev, "enable(%s)\n", dssdev->name);
 
+	/* Prepare the chain of external devices for pipeline enable. */
+	omapdss_device_pre_enable(dssdev->next);
+
+	/*
+	 * Enable the internal encoder. This will enable the DSS output. The
+	 * DSI is treated as an exception as DSI pipelines still use the legacy
+	 * flow where the pipeline output controls the encoder.
+	 */
+	if (dssdev->type != OMAP_DISPLAY_TYPE_DSI) {
+		if (dssdev->ops && dssdev->ops->enable)
+			dssdev->ops->enable(dssdev);
+		dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+	}
+
 	/*
 	 * Enable the chain of external devices, starting at the one at the
-	 * internal encoder's output. This is used for DSI outputs only, as
-	 * dssdev->next is NULL for all other outputs.
+	 * internal encoder's output.
 	 */
 	omapdss_device_enable(dssdev->next);
 }