diff mbox series

[v3,5/8] drm/panel: panel-simple: Implement .get_orientation callback

Message ID 20220606044720.945964-6-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-simple.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

Comments

Doug Anderson June 6, 2022, 2:22 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-simple.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)

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

Patch

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index a34f4198a534..82041cdb5478 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -411,7 +411,12 @@  static int panel_simple_get_modes(struct drm_panel *panel,
 	/* add hard-coded panel modes */
 	num += panel_simple_get_non_edid_modes(p, connector);
 
-	/* 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;
@@ -434,6 +439,14 @@  static int panel_simple_get_timings(struct drm_panel *panel,
 	return p->desc->num_timings;
 }
 
+static enum drm_panel_orientation panel_simple_get_orientation(struct drm_panel *panel)
+{
+       struct panel_simple *p = to_panel_simple(panel);
+
+       return p->orientation;
+}
+
+
 static const struct drm_panel_funcs panel_simple_funcs = {
 	.disable = panel_simple_disable,
 	.unprepare = panel_simple_unprepare,
@@ -441,6 +454,7 @@  static const struct drm_panel_funcs panel_simple_funcs = {
 	.enable = panel_simple_enable,
 	.get_modes = panel_simple_get_modes,
 	.get_timings = panel_simple_get_timings,
+	.get_orientation = panel_simple_get_orientation,
 };
 
 static struct panel_desc panel_dpi;