linux-kernel - [PATCHv3 6/8] drm/omap: add support for rotation hints from display drivers

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Message-Id: <20180330171822.25896-7-sebastian.reichel@collabora.co.uk>
Date:   Fri, 30 Mar 2018 19:18:20 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.co.uk>
To:     Sebastian Reichel <sre@...nel.org>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Tony Lindgren <tony@...mide.com>, Pavel Machek <pavel@....cz>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com,
        Sebastian Reichel <sebastian.reichel@...labora.co.uk>
Subject: [PATCHv3 6/8] drm/omap: add support for rotation hints from display drivers

This adds support for setting DRM panel orientation property
based on rotation information from the display driver.

Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.co.uk>
---
 drivers/gpu/drm/omapdrm/dss/omapdss.h    |  2 ++
 drivers/gpu/drm/omapdrm/omap_connector.c | 34 +++++++++++++++++++++++++++++++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index 14d74adb13fb..01a2a6638f70 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -554,6 +554,8 @@ struct omap_dss_driver {
 			    struct videomode *vm);
 	void (*get_size)(struct omap_dss_device *dssdev,
 			 unsigned int *width, unsigned int *height);
+	void (*get_rotation)(struct omap_dss_device *dssdev,
+				int *rotation);
 
 	int (*set_wss)(struct omap_dss_device *dssdev, u32 wss);
 	u32 (*get_wss)(struct omap_dss_device *dssdev);
diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index a33b51484b2d..f8ae8bdf9211 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -249,6 +249,8 @@ struct drm_connector *omap_connector_init(struct drm_device *dev,
 	struct drm_connector *connector = NULL;
 	struct omap_connector *omap_connector;
 	bool hpd_supported = false;
+	int rotation = -1;
+	int ret;
 
 	DBG("%s", dssdev->name);
 
@@ -267,7 +269,7 @@ struct drm_connector *omap_connector_init(struct drm_device *dev,
 	drm_connector_helper_add(connector, &omap_connector_helper_funcs);
 
 	if (dssdev->driver->register_hpd_cb) {
-		int ret = dssdev->driver->register_hpd_cb(dssdev,
+		ret = dssdev->driver->register_hpd_cb(dssdev,
 							  omap_connector_hpd_cb,
 							  omap_connector);
 		if (!ret)
@@ -288,6 +290,36 @@ struct drm_connector *omap_connector_init(struct drm_device *dev,
 	connector->interlace_allowed = 1;
 	connector->doublescan_allowed = 0;
 
+	if (dssdev->driver->get_rotation)
+		dssdev->driver->get_rotation(dssdev, &rotation);
+
+	switch (rotation) {
+	case 0:
+		connector->display_info.panel_orientation =
+			DRM_MODE_PANEL_ORIENTATION_NORMAL;
+		break;
+	case 90:
+		connector->display_info.panel_orientation =
+			DRM_MODE_PANEL_ORIENTATION_RIGHT_UP;
+		break;
+	case 180:
+		connector->display_info.panel_orientation =
+			DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP;
+		break;
+	case 270:
+		connector->display_info.panel_orientation =
+			DRM_MODE_PANEL_ORIENTATION_LEFT_UP;
+		break;
+	default:
+		connector->display_info.panel_orientation =
+			DRM_MODE_PANEL_ORIENTATION_UNKNOWN;
+		break;
+	}
+
+	ret = drm_connector_init_panel_orientation_property(connector, 0, 0);
+	if (ret)
+		DBG("%s: Failed to init orientation property (%d)", dssdev->name, ret);
+
 	return connector;
 
 fail:
-- 
2.16.2