Add DRM flags for the LCD display clock polarity so the pixelclk-active DT
property can be properly handled by drivers using the DRM API.
Signed-off-by: Marek Vasut <ma...@denx.de>
Cc: Dave Airlie <airl...@gmail.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Philipp Zabel <p.za...@pengutronix.de>
Cc: Sascha Hauer <s.ha...@pengutronix.de>
Cc: Shawn Guo <shawn....@linaro.org>
---
drivers/gpu/drm/drm_modes.c | 5 +++++
include/uapi/drm/drm_mode.h | 3 +++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 85071a1..d1f3bfc 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -537,6 +537,11 @@ int drm_display_mode_from_videomode(const struct videomode
*vm,
dmode->flags |= DRM_MODE_FLAG_DBLSCAN;
if (vm->flags & DISPLAY_FLAGS_DOUBLECLK)
dmode->flags |= DRM_MODE_FLAG_DBLCLK;
+ if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE)
+ dmode->flags |= DRM_MODE_FLAG_PIXELCLK_PPOL;
+ else if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ dmode->flags |= DRM_MODE_FLAG_PIXELCLK_NPOL;
+
drm_mode_set_name(dmode);
return 0;
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index f104c26..a6169ca 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -73,6 +73,9 @@
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (7<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (8<<14)
+/* CRTC LCD clock polarity flags. */
+#define DRM_MODE_FLAG_PIXELCLK_PPOL (1<<19)
+#define DRM_MODE_FLAG_PIXELCLK_NPOL (1<<20)
/* DPMS flags */
/* bit compatible with the xorg definitions. */
--
1.8.4.2
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