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Subject[PATCH v1 1/2] drm: Add missing flags for pixel clock & data enable
Date
Add missing flags for pixel clock & data enable polarities.
These flags are similar to other synchronization signals (hsync, vsync...).

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
---
drivers/gpu/drm/drm_modes.c | 19 ++++++++++++++++++-
include/uapi/drm/drm_mode.h | 6 ++++++
2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 02db9ac..596f8b3 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -130,7 +130,7 @@ EXPORT_SYMBOL(drm_mode_probed_add);
* according to the hdisplay, vdisplay, vrefresh.
* It is based from the VESA(TM) Coordinated Video Timing Generator by
* Graham Loveridge April 9, 2003 available at
- * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
+ * http://www.elo.utfsm.cl/~elo212/docs/CVTd6r1.xls
*
* And it is copied from xf86CVTmode in xserver/hw/xfree86/modes/xf86cvt.c.
* What I have done is to translate it by using integer calculation.
@@ -611,6 +611,15 @@ void 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_PPIXCLK;
+ else if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
+ dmode->flags |= DRM_MODE_FLAG_NPIXCLK;
+ if (vm->flags & DISPLAY_FLAGS_DE_HIGH)
+ dmode->flags |= DRM_MODE_FLAG_PDATAEN;
+ else if (vm->flags & DISPLAY_FLAGS_DE_LOW)
+ dmode->flags |= DRM_MODE_FLAG_NDE;
+
drm_mode_set_name(dmode);
}
EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);
@@ -652,6 +661,14 @@ void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;
if (dmode->flags & DRM_MODE_FLAG_DBLCLK)
vm->flags |= DISPLAY_FLAGS_DOUBLECLK;
+ if (dmode->flags & DRM_MODE_FLAG_PPIXDATA)
+ vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE;
+ else if (dmode->flags & DRM_MODE_FLAG_NPIXDATA)
+ vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE;
+ if (dmode->flags & DRM_MODE_FLAG_PDE)
+ vm->flags |= DISPLAY_FLAGS_DE_HIGH;
+ else if (dmode->flags & DRM_MODE_FLAG_NDE)
+ vm->flags |= DISPLAY_FLAGS_DE_LOW;
}
EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);

diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index d3e0fe3..b335a17 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -89,6 +89,12 @@ extern "C" {
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (7<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (8<<14)

+/* flags for polarity clock & data enable polarities */
+#define DRM_MODE_FLAG_PPIXDATA (1 << 19)
+#define DRM_MODE_FLAG_NPIXDATA (1 << 20)
+#define DRM_MODE_FLAG_PDE (1 << 21)
+#define DRM_MODE_FLAG_NDE (1 << 22)
+
/* Picture aspect ratio options */
#define DRM_MODE_PICTURE_ASPECT_NONE 0
#define DRM_MODE_PICTURE_ASPECT_4_3 1
--
2.7.4
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