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@eukrea.com --- 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 */