target/linux/bcm27xx/patches-6.1/950-0499-drm-vc4-crtc-Introduce-a-lower-level-crtc-init-helpe.patch

   1 From 4e2742244ff3084dfcd465180d7b7b843af13854 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Mon, 14 Nov 2022 14:11:41 +0100
   4 Subject: [PATCH] drm/vc4: crtc: Introduce a lower-level crtc init
   5  helper
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 The current vc4_crtc_init() helper assumes that we will be using
  11 hardware planes and calls vc4_plane_init().
  12
  13 While it's a reasonable assumption, we'll want to mock the plane and
  14 thus provide our own. Let's create a helper that will take the plane as
  15 an argument.
  16
  17 Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
  18 Reviewed-by: Maíra Canal <mcanal@igalia.com>
  19 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  20 ---
  21  drivers/gpu/drm/vc4/vc4_crtc.c | 70 +++++++++++++++++++++++++---------
  22  drivers/gpu/drm/vc4/vc4_drv.h  |  6 +++
  23  2 files changed, 57 insertions(+), 19 deletions(-)
  24
  25 --- a/drivers/gpu/drm/vc4/vc4_crtc.c
  26 +++ b/drivers/gpu/drm/vc4/vc4_crtc.c
  27 @@ -1326,31 +1326,38 @@ static void vc4_set_crtc_possible_masks(
  28         }
  29  }
  30
  31 -int vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
  32 -                 struct vc4_crtc *vc4_crtc,
  33 -                 const struct vc4_crtc_data *data,
  34 -                 const struct drm_crtc_funcs *crtc_funcs,
  35 -                 const struct drm_crtc_helper_funcs *crtc_helper_funcs,
  36 -                 bool feeds_txp)
  37 +/**
  38 + * __vc4_crtc_init - Initializes a CRTC
  39 + * @drm: DRM Device
  40 + * @pdev: CRTC Platform Device
  41 + * @vc4_crtc: CRTC Object to Initialize
  42 + * @data: Configuration data associated with this CRTC
  43 + * @primary_plane: Primary plane for CRTC
  44 + * @crtc_funcs: Callbacks for the new CRTC
  45 + * @crtc_helper_funcs: Helper Callbacks for the new CRTC
  46 + * @feeds_txp: Is this CRTC connected to the TXP?
  47 + *
  48 + * Initializes our private CRTC structure. This function is mostly
  49 + * relevant for KUnit testing, all other users should use
  50 + * vc4_crtc_init() instead.
  51 + *
  52 + * Returns:
  53 + * 0 on success, a negative error code on failure.
  54 + */
  55 +int __vc4_crtc_init(struct drm_device *drm,
  56 +                   struct platform_device *pdev,
  57 +                   struct vc4_crtc *vc4_crtc,
  58 +                   const struct vc4_crtc_data *data,
  59 +                   struct drm_plane *primary_plane,
  60 +                   const struct drm_crtc_funcs *crtc_funcs,
  61 +                   const struct drm_crtc_helper_funcs *crtc_helper_funcs,
  62 +                   bool feeds_txp)
  63  {
  64         struct vc4_dev *vc4 = to_vc4_dev(drm);
  65         struct drm_crtc *crtc = &vc4_crtc->base;
  66 -       struct drm_plane *primary_plane;
  67         unsigned int i;
  68         int ret;
  69
  70 -       /* For now, we create just the primary and the legacy cursor
  71 -        * planes.  We should be able to stack more planes on easily,
  72 -        * but to do that we would need to compute the bandwidth
  73 -        * requirement of the plane configuration, and reject ones
  74 -        * that will take too much.
  75 -        */
  76 -       primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY, 0);
  77 -       if (IS_ERR(primary_plane)) {
  78 -               dev_err(drm->dev, "failed to construct primary plane\n");
  79 -               return PTR_ERR(primary_plane);
  80 -       }
  81 -
  82         vc4_crtc->data = data;
  83         vc4_crtc->pdev = pdev;
  84         vc4_crtc->feeds_txp = feeds_txp;
  85 @@ -1399,6 +1406,31 @@ int vc4_crtc_init(struct drm_device *drm
  86         return 0;
  87  }
  88
  89 +int vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
  90 +                 struct vc4_crtc *vc4_crtc,
  91 +                 const struct vc4_crtc_data *data,
  92 +                 const struct drm_crtc_funcs *crtc_funcs,
  93 +                 const struct drm_crtc_helper_funcs *crtc_helper_funcs,
  94 +                 bool feeds_txp)
  95 +{
  96 +       struct drm_plane *primary_plane;
  97 +
  98 +       /* For now, we create just the primary and the legacy cursor
  99 +        * planes.  We should be able to stack more planes on easily,
 100 +        * but to do that we would need to compute the bandwidth
 101 +        * requirement of the plane configuration, and reject ones
 102 +        * that will take too much.
 103 +        */
 104 +       primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY, 0);
 105 +       if (IS_ERR(primary_plane)) {
 106 +               dev_err(drm->dev, "failed to construct primary plane\n");
 107 +               return PTR_ERR(primary_plane);
 108 +       }
 109 +
 110 +       return __vc4_crtc_init(drm, pdev, vc4_crtc, data, primary_plane,
 111 +                              crtc_funcs, crtc_helper_funcs, feeds_txp);
 112 +}
 113 +
 114  static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
 115  {
 116         struct platform_device *pdev = to_platform_device(dev);
 117 --- a/drivers/gpu/drm/vc4/vc4_drv.h
 118 +++ b/drivers/gpu/drm/vc4/vc4_drv.h
 119 @@ -912,6 +912,12 @@ int vc4_bo_debugfs_init(struct drm_minor
 120  /* vc4_crtc.c */
 121  extern struct platform_driver vc4_crtc_driver;
 122  int vc4_crtc_disable_at_boot(struct drm_crtc *crtc);
 123 +int __vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
 124 +                   struct vc4_crtc *vc4_crtc, const struct vc4_crtc_data *data,
 125 +                   struct drm_plane *primary_plane,
 126 +                   const struct drm_crtc_funcs *crtc_funcs,
 127 +                   const struct drm_crtc_helper_funcs *crtc_helper_funcs,
 128 +                   bool feeds_txp);
 129  int vc4_crtc_init(struct drm_device *drm, struct platform_device *pdev,
 130                   struct vc4_crtc *vc4_crtc, const struct vc4_crtc_data *data,
 131                   const struct drm_crtc_funcs *crtc_funcs,