A DeviceTree panel node can specify the panel's rotation in steps of 90 degrees. Set the DRM connector orientation from the field. Do nothing if the field is missing or invalid.
Signed-off-by: Thomas Zimmermann <[email protected]> --- drivers/gpu/drm/sysfb/simpledrm.c | 32 +++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/sysfb/simpledrm.c b/drivers/gpu/drm/sysfb/simpledrm.c index 5c1db0785d92..a84d4284b814 100644 --- a/drivers/gpu/drm/sysfb/simpledrm.c +++ b/drivers/gpu/drm/sysfb/simpledrm.c @@ -229,6 +229,33 @@ simplefb_get_panel_height_mm_of(struct drm_device *dev, struct device_node *of_p return __simplefb_get_panel_size_mm_of(dev, of_panel_node, "height-mm"); } +static enum drm_panel_orientation +simplefb_get_panel_orientation_of(struct drm_device *dev, struct device_node *of_panel_node) +{ + int ret; + u32 rotation; + + ret = of_property_read_u32(of_panel_node, "rotation", &rotation); + if (ret) { + drm_dbg(dev, "simplefb: cannot parse panel rotation: error %d\n", ret); + return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; + } + + switch (rotation) { + case 0: + return DRM_MODE_PANEL_ORIENTATION_NORMAL; + case 90: + return DRM_MODE_PANEL_ORIENTATION_RIGHT_UP; + case 180: + return DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP; + case 270: + return DRM_MODE_PANEL_ORIENTATION_LEFT_UP; + default: + drm_dbg(dev, "simplefb: cannot parse panel rotation: value %u\n", rotation); + return DRM_MODE_PANEL_ORIENTATION_UNKNOWN; + } +} + /* * Simple Framebuffer device */ @@ -632,6 +659,7 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, int width, height, stride; u16 width_mm = 0, height_mm = 0; struct device_node *panel_node; + enum drm_panel_orientation orientation = DRM_MODE_PANEL_ORIENTATION_UNKNOWN; const struct drm_format_info *format; struct resource *res, *mem = NULL; struct drm_plane *primary_plane; @@ -696,6 +724,7 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, if (panel_node) { width_mm = simplefb_get_panel_width_mm_of(dev, panel_node); height_mm = simplefb_get_panel_height_mm_of(dev, panel_node); + orientation = simplefb_get_panel_orientation_of(dev, panel_node); of_node_put(panel_node); } } else { @@ -831,8 +860,7 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv, if (ret) return ERR_PTR(ret); drm_connector_helper_add(connector, &simpledrm_connector_helper_funcs); - drm_connector_set_panel_orientation_with_quirk(connector, - DRM_MODE_PANEL_ORIENTATION_UNKNOWN, + drm_connector_set_panel_orientation_with_quirk(connector, orientation, width, height); ret = drm_connector_attach_encoder(connector, encoder); -- 2.54.0
