diff mbox series

[v3,3/8] drm/panel: panel-edp: Implement .get_orientation callback

Message ID 20220606044720.945964-4-hsinyi@chromium.org (mailing list archive)
State New, archived
Headers show
Series Add a panel API to return panel orientation | expand

Commit Message

Hsin-Yi Wang June 6, 2022, 4:47 a.m. UTC 
To return the orientation property to drm/kms driver.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
---
v2->v3: add comments for notice.
---
 drivers/gpu/drm/panel/panel-edp.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

Comments

Doug Anderson June 6, 2022, 2:21 p.m. UTC | #1 
Hi,

On Sun, Jun 5, 2022 at 9:47 PM Hsin-Yi Wang <hsinyi@chromium.org> wrote:
>
> To return the orientation property to drm/kms driver.
>
> Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
> Reviewed-by: Hans de Goede <hdegoede@redhat.com>
> ---
> v2->v3: add comments for notice.
> ---
>  drivers/gpu/drm/panel/panel-edp.c | 15 ++++++++++++++-
>  1 file changed, 14 insertions(+), 1 deletion(-)

Reviewed-by: Douglas Anderson <dianders@chromium.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/panel/panel-edp.c b/drivers/gpu/drm/panel/panel-edp.c
index 1732b4f56e38..5fa208005395 100644
--- a/drivers/gpu/drm/panel/panel-edp.c
+++ b/drivers/gpu/drm/panel/panel-edp.c
@@ -586,7 +586,12 @@  static int panel_edp_get_modes(struct drm_panel *panel,
 	else if (!num)
 		dev_warn(p->base.dev, "No display modes\n");
 
-	/* set up connector's "panel orientation" property */
+	/*
+	 * drm drivers are expected to call drm_panel_get_orientation() to get
+	 * panel's orientation then drm_connector_set_panel_orientation() to
+	 * set the property before drm_dev_register(). Otherwise there will be
+	 * a WARN_ON if orientation is set after drm is registered.
+	 */
 	drm_connector_set_panel_orientation(connector, p->orientation);
 
 	return num;
@@ -609,6 +614,13 @@  static int panel_edp_get_timings(struct drm_panel *panel,
 	return p->desc->num_timings;
 }
 
+static enum drm_panel_orientation panel_edp_get_orientation(struct drm_panel *panel)
+{
+	struct panel_edp *p = to_panel_edp(panel);
+
+       return p->orientation;
+}
+
 static int detected_panel_show(struct seq_file *s, void *data)
 {
 	struct drm_panel *panel = s->private;
@@ -637,6 +649,7 @@  static const struct drm_panel_funcs panel_edp_funcs = {
 	.prepare = panel_edp_prepare,
 	.enable = panel_edp_enable,
 	.get_modes = panel_edp_get_modes,
+	.get_orientation = panel_edp_get_orientation,
 	.get_timings = panel_edp_get_timings,
 	.debugfs_init = panel_edp_debugfs_init,
 };