We need a way to pass signal polarity informations
between DRM panels, and the display drivers.
To do that, a pol_flags field was added to drm_display_mode.
Signed-off-by: Denis Carikli <denis@xxxxxxxxxx>
---
ChangeLog v11->v12:
- Rebased: This patch now applies against drm_modes.h
- Rebased: It now uses the new DRM_MODE_FLAG_POL_DE flags defines names
ChangeLog v10->v11:
- Since the imx-drm won't be able to retrive its regulators
from the device tree when using display-timings nodes,
and that I was told that the drm simple-panel driver
already supported that, I then, instead, added what was
lacking to make the eukrea displays work with the
drm-simple-panel driver.
That required a way to get back the display polarity
informations from the imx-drm driver without affecting
userspace.
---
include/drm/drm_modes.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index 2dbbf99..b3789e2 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -93,6 +93,13 @@ enum drm_mode_status {
#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
+#define DRM_MODE_FLAG_POL_PIXDATA_NEGEDGE BIT(1)
+#define DRM_MODE_FLAG_POL_PIXDATA_POSEDGE BIT(2)
+#define DRM_MODE_FLAG_POL_PIXDATA_PRESERVE BIT(3)
+#define DRM_MODE_FLAG_POL_DE_LOW BIT(4)
+#define DRM_MODE_FLAG_POL_DE_HIGH BIT(5)
+#define DRM_MODE_FLAG_POL_DE_PRESERVE BIT(6)
+
struct drm_display_mode {
/* Header */
struct list_head head;
@@ -144,6 +151,7 @@ struct drm_display_mode {
int vrefresh; /* in Hz */
int hsync; /* in kHz */
enum hdmi_picture_aspect picture_aspect_ratio;
+ unsigned int pol_flags;
};
/* mode specified on the command line */
--
1.7.9.5
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