target/linux/brcm2708/patches-4.19/950-0526-drm-vc4-Need-to-call-drm_crtc_vblank_-on-off-from-vc.patch

   1 From fe2432615ecc3500cc265d6b84334950b9cbd4bf Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 9 Apr 2019 18:14:44 +0100
   4 Subject: [PATCH] from
   5  vc4_crtc_[en|dis]able
   6
   7 vblank needs to be enabled and disabled by the driver to avoid the
   8 DRM framework complaining in the kernel log.
   9
  10 vc4_fkms_disable_vblank needs to signal that we don't want vblank
  11 callbacks too.
  12
  13 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  14 ---
  15  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 6 ++++++
  16  1 file changed, 6 insertions(+)
  17
  18 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  19 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  20 @@ -562,6 +562,8 @@ static void vc4_crtc_mode_set_nofb(struc
  21
  22  static void vc4_crtc_disable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  23  {
  24 +       drm_crtc_vblank_off(crtc);
  25 +
  26         /* Always turn the planes off on CRTC disable. In DRM, planes
  27          * are enabled/disabled through the update/disable hooks
  28          * above, and the CRTC enable/disable independently controls
  29 @@ -577,6 +579,7 @@ static void vc4_crtc_disable(struct drm_
  30
  31  static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
  32  {
  33 +       drm_crtc_vblank_on(crtc);
  34         /* Unblank the planes (if they're supposed to be displayed). */
  35
  36         if (crtc->primary->state->fb)
  37 @@ -673,6 +676,9 @@ static int vc4_fkms_enable_vblank(struct
  38
  39  static void vc4_fkms_disable_vblank(struct drm_crtc *crtc)
  40  {
  41 +       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
  42 +
  43 +       vc4_crtc->vblank_enabled = false;
  44  }
  45
  46  static const struct drm_crtc_funcs vc4_crtc_funcs = {