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From b03aa8d12928c3413b3f02fd7c52d900edee196a Mon Sep 17 00:00:00 2001
From: Mario Kleiner <mario.kleiner.de@gmail.com>
Date: Tue, 19 Jul 2016 20:58:57 +0200
Subject: [PATCH] drm/vc4: Disallow interlaced modes on DPI.
We already don't expose such modes to userspace, but make
sure userspace can't sneak some interlaced mode in.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/vc4_dpi.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -349,9 +349,20 @@ static void vc4_dpi_encoder_enable(struc
}
}
+static bool vc4_dpi_encoder_mode_fixup(struct drm_encoder *encoder,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return false;
+
+ return true;
+}
+
static const struct drm_encoder_helper_funcs vc4_dpi_encoder_helper_funcs = {
.disable = vc4_dpi_encoder_disable,
.enable = vc4_dpi_encoder_enable,
+ .mode_fixup = vc4_dpi_encoder_mode_fixup,
};
static const struct of_device_id vc4_dpi_dt_match[] = {
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