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- From 30f69de2c6e1dedc4d071a24a0690e81118421d9 Mon Sep 17 00:00:00 2001
- From: Mario Kleiner <mario.kleiner.de@gmail.com>
- Date: Tue, 19 Jul 2016 20:58:59 +0200
- Subject: [PATCH] drm/vc4: Reject doublescan modes.
- We can't handle doublescan modes at the moment, so if
- userspace tries to set one, reject the mode set.
- Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
- Signed-off-by: Eric Anholt <eric@anholt.net>
- ---
- drivers/gpu/drm/vc4/vc4_crtc.c | 7 +++++++
- 1 file changed, 7 insertions(+)
- --- a/drivers/gpu/drm/vc4/vc4_crtc.c
- +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
- @@ -542,6 +542,13 @@ static bool vc4_crtc_mode_fixup(struct d
- const struct drm_display_mode *mode,
- struct drm_display_mode *adjusted_mode)
- {
- + /* Do not allow doublescan modes from user space */
- + if (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN) {
- + DRM_DEBUG_KMS("[CRTC:%d] Doublescan mode rejected.\n",
- + crtc->base.id);
- + return false;
- + }
- +
- /*
- * Interlaced video modes got CRTC_INTERLACE_HALVE_V applied when
- * coming from user space. We don't want this, as it screws up
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