From 05ebac0980543cf93dbd4a29e6b03c1c9b883c70 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Tue, 14 Nov 2017 20:32:52 +0200
Subject: [PATCH] drm/uapi: Deprecate DRM_MODE_FLAG_BCAST
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Reject any mode with DRM_MODE_FLAG_BCAST. We have no code that even
checks for this flag hence it can't possibly do any good.
I think this maybe originated from fbdev where it was supposed to
indicate PAL/NTSC broadcast timings. I have no idea why those would
have to be identified by a flag rather than by just the timings
themselves. And then I assume it got copied into xfree86 for
fbdevhw, and later on it leaked into the randr protocol and kms uapi.
Since kms fbdev emulation never uses the corresponding fbdev flag
there should be no sane way for this to come back into kms via
userspace either.
Cc: Jose Abreu <Jose.Abreu@synopsys.com>
Cc: Adam Jackson <ajax@redhat.com>
Cc: Keith Packard <keithp@keithp.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171114183258.16976-5-ville.syrjala@linux.intel.com
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
---
include/drm/drm_modes.h | 2 +-
include/uapi/drm/drm_mode.h | 3 +--
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index bce573375dd83..09773e766e1f9 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -299,7 +299,7 @@ struct drm_display_mode {
* - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
* - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
* - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
- * - DRM_MODE_FLAG_BCAST: not used?
+ * - DRM_MODE_FLAG_BCAST: <deprecated>
* - DRM_MODE_FLAG_PIXMUX: <deprecated>
* - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
* - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index 8d872e17223e7..a7cded1c43e8e 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -74,7 +74,7 @@ extern "C" {
#define DRM_MODE_FLAG_PCSYNC (1<<7)
#define DRM_MODE_FLAG_NCSYNC (1<<8)
#define DRM_MODE_FLAG_HSKEW (1<<9) /* hskew provided */
-#define DRM_MODE_FLAG_BCAST (1<<10)
+#define DRM_MODE_FLAG_BCAST (1<<10) /* deprecated */
#define DRM_MODE_FLAG_PIXMUX (1<<11) /* deprecated */
#define DRM_MODE_FLAG_DBLCLK (1<<12)
#define DRM_MODE_FLAG_CLKDIV2 (1<<13)
@@ -117,7 +117,6 @@ extern "C" {
DRM_MODE_FLAG_PCSYNC | \
DRM_MODE_FLAG_NCSYNC | \
DRM_MODE_FLAG_HSKEW | \
- DRM_MODE_FLAG_BCAST | \
DRM_MODE_FLAG_DBLCLK | \
DRM_MODE_FLAG_CLKDIV2 | \
DRM_MODE_FLAG_3D_MASK)
--
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