target/linux/brcm2708/patches-4.4/0515-drm-vc4-Disallow-interlaced-modes-on-DPI.patch

   1 From b03aa8d12928c3413b3f02fd7c52d900edee196a Mon Sep 17 00:00:00 2001
   2 From: Mario Kleiner <mario.kleiner.de@gmail.com>
   3 Date: Tue, 19 Jul 2016 20:58:57 +0200
   4 Subject: [PATCH] drm/vc4: Disallow interlaced modes on DPI.
   5
   6 We already don't expose such modes to userspace, but make
   7 sure userspace can't sneak some interlaced mode in.
   8
   9 Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
  10 Signed-off-by: Eric Anholt <eric@anholt.net>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_dpi.c | 11 +++++++++++
  13  1 file changed, 11 insertions(+)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_dpi.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_dpi.c
  17 @@ -349,9 +349,20 @@ static void vc4_dpi_encoder_enable(struc
  18         }
  19  }
  20
  21 +static bool vc4_dpi_encoder_mode_fixup(struct drm_encoder *encoder,
  22 +                                      const struct drm_display_mode *mode,
  23 +                                      struct drm_display_mode *adjusted_mode)
  24 +{
  25 +       if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
  26 +               return false;
  27 +
  28 +       return true;
  29 +}
  30 +
  31  static const struct drm_encoder_helper_funcs vc4_dpi_encoder_helper_funcs = {
  32         .disable = vc4_dpi_encoder_disable,
  33         .enable = vc4_dpi_encoder_enable,
  34 +       .mode_fixup = vc4_dpi_encoder_mode_fixup,
  35  };
  36
  37  static const struct of_device_id vc4_dpi_dt_match[] = {