target/linux/bcm27xx/patches-4.19/950-0110-drm-vc4-Add-missing-enable-disable-vblank-handlers-i.patch

   1 From 10d8194f8415a69d3ea049450e86e14572591a71 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Tue, 30 Jan 2018 14:21:02 -0800
   4 Subject: [PATCH] drm/vc4: Add missing enable/disable vblank handlers
   5  in fkms.
   6
   7 Fixes hang at boot in 4.14.
   8
   9 Signed-off-by: Eric Anholt <eric@anholt.net>
  10 ---
  11  drivers/gpu/drm/vc4/vc4_crtc.c         | 14 --------------
  12  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 15 +++++++++++++++
  13  2 files changed, 15 insertions(+), 14 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_crtc.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
  17 @@ -764,15 +764,8 @@ static void vc4_crtc_atomic_flush(struct
  18
  19  static int vc4_enable_vblank(struct drm_crtc *crtc)
  20  {
  21 -       struct drm_device *dev = crtc->dev;
  22 -       struct vc4_dev *vc4 = to_vc4_dev(dev);
  23         struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  24
  25 -       if (vc4->firmware_kms) {
  26 -               /* XXX: Can we mask the SMI interrupt? */
  27 -               return 0;
  28 -       }
  29 -
  30         CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
  31
  32         return 0;
  33 @@ -780,15 +773,8 @@ static int vc4_enable_vblank(struct drm_
  34
  35  static void vc4_disable_vblank(struct drm_crtc *crtc)
  36  {
  37 -       struct drm_device *dev = crtc->dev;
  38 -       struct vc4_dev *vc4 = to_vc4_dev(dev);
  39         struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  40
  41 -       if (vc4->firmware_kms) {
  42 -               /* XXX: Can we mask the SMI interrupt? */
  43 -               return;
  44 -       }
  45 -
  46         CRTC_WRITE(PV_INTEN, 0);
  47  }
  48
  49 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  50 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  51 @@ -433,6 +433,19 @@ static int vc4_page_flip(struct drm_crtc
  52         return drm_atomic_helper_page_flip(crtc, fb, event, flags, ctx);
  53  }
  54
  55 +static int vc4_fkms_enable_vblank(struct drm_crtc *crtc)
  56 +{
  57 +       /* XXX: Need a way to enable/disable the interrupt, to avoid
  58 +        * DRM warnings at boot time.
  59 +        */
  60 +
  61 +       return 0;
  62 +}
  63 +
  64 +static void vc4_fkms_disable_vblank(struct drm_crtc *crtc)
  65 +{
  66 +}
  67 +
  68  static const struct drm_crtc_funcs vc4_crtc_funcs = {
  69         .set_config = drm_atomic_helper_set_config,
  70         .destroy = drm_crtc_cleanup,
  71 @@ -443,6 +456,8 @@ static const struct drm_crtc_funcs vc4_c
  72         .reset = drm_atomic_helper_crtc_reset,
  73         .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
  74         .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
  75 +       .enable_vblank = vc4_fkms_enable_vblank,
  76 +       .disable_vblank = vc4_fkms_disable_vblank,
  77  };
  78
  79  static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {