target/linux/bcm27xx/patches-4.19/950-0527-drm-vc4-Add-support-for-H-V-flips-on-each-plane-for-.patch

   1 From 129100bd38125bef5fe237ab867349dbe8b210ba Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 9 Apr 2019 17:19:51 +0100
   4 Subject: [PATCH] drm: vc4: Add support for H & V flips on each plane
   5  for FKMS
   6
   7 They are near zero cost options for the HVS, therefore they
   8 may as well be implemented, and it allows us to invert the
   9 DSI display.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  12 ---
  13  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 36 ++++++++++++++++++++++++++
  14  1 file changed, 36 insertions(+)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  18 @@ -61,8 +61,21 @@ struct set_plane {
  19         u8 padding;
  20
  21         u32 planes[4];  /* DMA address of each plane */
  22 +
  23 +       u32 transform;
  24  };
  25
  26 +/* Values for the transform field */
  27 +#define TRANSFORM_NO_ROTATE    0
  28 +#define TRANSFORM_ROTATE_180   BIT(1)
  29 +#define TRANSFORM_FLIP_HRIZ    BIT(16)
  30 +#define TRANSFORM_FLIP_VERT    BIT(17)
  31 +
  32 +#define SUPPORTED_ROTATIONS    (DRM_MODE_ROTATE_0 | \
  33 +                                DRM_MODE_ROTATE_180 | \
  34 +                                DRM_MODE_REFLECT_X | \
  35 +                                DRM_MODE_REFLECT_Y)
  36 +
  37  struct mailbox_set_plane {
  38         struct rpi_firmware_property_tag_header tag;
  39         struct set_plane plane;
  40 @@ -274,6 +287,7 @@ static void vc4_plane_atomic_update(stru
  41         struct vc4_crtc *vc4_crtc = to_vc4_crtc(state->crtc);
  42         int num_planes = fb->format->num_planes;
  43         struct drm_display_mode *mode = &state->crtc->mode;
  44 +       unsigned int rotation = SUPPORTED_ROTATIONS;
  45
  46         mb->plane.vc_image_type = vc_fmt->vc_image;
  47         mb->plane.width = fb->width;
  48 @@ -294,6 +308,24 @@ static void vc4_plane_atomic_update(stru
  49         mb->plane.is_vu = vc_fmt->is_vu;
  50         mb->plane.planes[0] = bo->paddr + fb->offsets[0];
  51
  52 +       rotation = drm_rotation_simplify(state->rotation, rotation);
  53 +
  54 +       switch (rotation) {
  55 +       default:
  56 +       case DRM_MODE_ROTATE_0:
  57 +               mb->plane.transform = TRANSFORM_NO_ROTATE;
  58 +               break;
  59 +       case DRM_MODE_ROTATE_180:
  60 +               mb->plane.transform = TRANSFORM_ROTATE_180;
  61 +               break;
  62 +       case DRM_MODE_REFLECT_X:
  63 +               mb->plane.transform = TRANSFORM_FLIP_HRIZ;
  64 +               break;
  65 +       case DRM_MODE_REFLECT_Y:
  66 +               mb->plane.transform = TRANSFORM_FLIP_VERT;
  67 +               break;
  68 +       }
  69 +
  70         /* FIXME: If the dest rect goes off screen then clip the src rect so we
  71          * don't have off-screen pixels.
  72          */
  73 @@ -514,9 +546,13 @@ static struct drm_plane *vc4_fkms_plane_
  74                                        formats, num_formats, modifiers,
  75                                        type, NULL);
  76
  77 +       /* FIXME: Do we need to be checking return values from all these calls?
  78 +        */
  79         drm_plane_helper_add(plane, &vc4_plane_helper_funcs);
  80
  81         drm_plane_create_alpha_property(plane);
  82 +       drm_plane_create_rotation_property(plane, DRM_MODE_ROTATE_0,
  83 +                                          SUPPORTED_ROTATIONS);
  84
  85         /*
  86          * Default frame buffer setup is with FB on -127, and raspistill etc