target/linux/bcm27xx/patches-5.4/950-0237-gpu-vc4-fkms-Switch-to-the-newer-mailbox-frame-buffe.patch

   1 From b721bcc62759ae7a2d9730d1121974702be96d7c Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Tue, 26 Mar 2019 14:43:06 +0000
   4 Subject: [PATCH] gpu: vc4-fkms: Switch to the newer mailbox frame
   5  buffer API.
   6
   7 The old mailbox FB API was ideally deprecated but still used by
   8 the FKMS driver.
   9 Update to the newer API.
  10
  11 NB This needs current firmware that accepts ARM allocated buffers
  12 through the newer API.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  15 ---
  16  drivers/gpu/drm/vc4/vc4_firmware_kms.c | 109 +++++++++++++------------
  17  1 file changed, 57 insertions(+), 52 deletions(-)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
  21 @@ -30,6 +30,25 @@
  22  #include "vc4_regs.h"
  23  #include <soc/bcm2835/raspberrypi-firmware.h>
  24
  25 +struct fb_alloc_tags {
  26 +       struct rpi_firmware_property_tag_header tag1;
  27 +       u32 xres, yres;
  28 +       struct rpi_firmware_property_tag_header tag2;
  29 +       u32 xres_virtual, yres_virtual;
  30 +       struct rpi_firmware_property_tag_header tag3;
  31 +       u32 bpp;
  32 +       struct rpi_firmware_property_tag_header tag4;
  33 +       u32 xoffset, yoffset;
  34 +       struct rpi_firmware_property_tag_header tag5;
  35 +       u32 base, screen_size;
  36 +       struct rpi_firmware_property_tag_header tag6;
  37 +       u32 pitch;
  38 +       struct rpi_firmware_property_tag_header tag7;
  39 +       u32 alpha_mode;
  40 +       struct rpi_firmware_property_tag_header tag8;
  41 +       u32 layer;
  42 +};
  43 +
  44  /* The firmware delivers a vblank interrupt to us through the SMI
  45   * hardware, which has only this one register.
  46   */
  47 @@ -123,45 +142,39 @@ static void vc4_primary_plane_atomic_upd
  48                                             struct drm_plane_state *old_state)
  49  {
  50         struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
  51 -       struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
  52         struct drm_plane_state *state = plane->state;
  53         struct drm_framebuffer *fb = state->fb;
  54         struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
  55 -       volatile struct fbinfo_s *fbinfo = vc4_plane->fbinfo;
  56 +       u32 format = fb->format->format;
  57 +       struct fb_alloc_tags fbinfo = {
  58 +               .tag1 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PHYSICAL_WIDTH_HEIGHT,
  59 +                         8, 0, },
  60 +                       .xres = state->crtc_w,
  61 +                       .yres = state->crtc_h,
  62 +               .tag2 = { RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_WIDTH_HEIGHT,
  63 +                         8, 0, },
  64 +                       .xres_virtual = state->crtc_w,
  65 +                       .yres_virtual = state->crtc_h,
  66 +               .tag3 = { RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH, 4, 0 },
  67 +                       .bpp = 32,
  68 +               .tag4 = { RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET, 8, 0 },
  69 +                       .xoffset = 0,
  70 +                       .yoffset = 0,
  71 +               .tag5 = { RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE, 8, 0 },
  72 +                       .base = bo->paddr + fb->offsets[0],
  73 +                       .screen_size = state->crtc_w * state->crtc_h * 4,
  74 +               .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH, 4, 0 },
  75 +                       .pitch = fb->pitches[0],
  76 +               .tag7 = { RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE, 4, 0 },
  77 +                       .alpha_mode = format == DRM_FORMAT_ARGB8888 ? 0 : 2,
  78 +               .tag8 = { RPI_FIRMWARE_FRAMEBUFFER_SET_LAYER, 4, 0 },
  79 +                       .layer = -127,
  80 +       };
  81         u32 bpp = 32;
  82         int ret;
  83
  84 -       fbinfo->xres = state->crtc_w;
  85 -       fbinfo->yres = state->crtc_h;
  86 -       fbinfo->xres_virtual = state->crtc_w;
  87 -       fbinfo->yres_virtual = state->crtc_h;
  88 -       fbinfo->bpp = bpp;
  89 -       fbinfo->xoffset = state->crtc_x;
  90 -       fbinfo->yoffset = state->crtc_y;
  91 -       fbinfo->base = bo->paddr + fb->offsets[0];
  92 -       fbinfo->pitch = fb->pitches[0];
  93 -
  94         if (fb->modifier == DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED)
  95 -               fbinfo->bpp |= BIT(31);
  96 -
  97 -       /* A bug in the firmware makes it so that if the fb->base is
  98 -        * set to nonzero, the configured pitch gets overwritten with
  99 -        * the previous pitch.  So, to get the configured pitch
 100 -        * recomputed, we have to make it allocate itself a new buffer
 101 -        * in VC memory, first.
 102 -        */
 103 -       if (vc4_plane->pitch != fb->pitches[0]) {
 104 -               u32 saved_base = fbinfo->base;
 105 -               fbinfo->base = 0;
 106 -
 107 -               ret = rpi_firmware_transaction(vc4->firmware,
 108 -                                              RPI_FIRMWARE_CHAN_FB,
 109 -                                              vc4_plane->fbinfo_bus_addr);
 110 -               fbinfo->base = saved_base;
 111 -
 112 -               vc4_plane->pitch = fbinfo->pitch;
 113 -               WARN_ON_ONCE(vc4_plane->pitch != fb->pitches[0]);
 114 -       }
 115 +               fbinfo.bpp |= BIT(31);
 116
 117         DRM_DEBUG_ATOMIC("[PLANE:%d:%s] primary update %dx%d@%d +%d,%d 0x%pad/%d\n",
 118                          plane->base.id, plane->name,
 119 @@ -170,14 +183,13 @@ static void vc4_primary_plane_atomic_upd
 120                          bpp,
 121                          state->crtc_x,
 122                          state->crtc_y,
 123 -                        &fbinfo->base,
 124 +                        &fbinfo.base,
 125                          fb->pitches[0]);
 126
 127 -       ret = rpi_firmware_transaction(vc4->firmware,
 128 -                                      RPI_FIRMWARE_CHAN_FB,
 129 -                                      vc4_plane->fbinfo_bus_addr);
 130 -       WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]);
 131 -       WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]);
 132 +       ret = rpi_firmware_property_list(vc4->firmware, &fbinfo,
 133 +                                        sizeof(fbinfo));
 134 +       WARN_ON_ONCE(fbinfo.pitch != fb->pitches[0]);
 135 +       WARN_ON_ONCE(fbinfo.base != bo->paddr + fb->offsets[0]);
 136
 137         /* If the CRTC is on (or going to be on) and we're enabled,
 138          * then unblank.  Otherwise, stay blank until CRTC enable.
 139 @@ -333,10 +345,10 @@ static const struct drm_plane_helper_fun
 140  static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
 141                                              enum drm_plane_type type)
 142  {
 143 +       /* Primary and cursor planes only */
 144         struct drm_plane *plane = NULL;
 145         struct vc4_fkms_plane *vc4_plane;
 146 -       u32 xrgb8888 = DRM_FORMAT_XRGB8888;
 147 -       u32 argb8888 = DRM_FORMAT_ARGB8888;
 148 +       u32 formats[] = {DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888};
 149         int ret = 0;
 150         bool primary = (type == DRM_PLANE_TYPE_PRIMARY);
 151         static const uint64_t modifiers[] = {
 152 @@ -358,22 +370,15 @@ static struct drm_plane *vc4_fkms_plane_
 153         plane = &vc4_plane->base;
 154         ret = drm_universal_plane_init(dev, plane, 0xff,
 155                                        &vc4_plane_funcs,
 156 -                                      primary ? &xrgb8888 : &argb8888, 1,
 157 -                                      modifiers,
 158 +                                      formats, primary ? 2 : 1, modifiers,
 159                                        type, primary ? "primary" : "cursor");
 160
 161 -       if (type == DRM_PLANE_TYPE_PRIMARY) {
 162 -               vc4_plane->fbinfo =
 163 -                       dma_alloc_coherent(dev->dev,
 164 -                                          sizeof(*vc4_plane->fbinfo),
 165 -                                          &vc4_plane->fbinfo_bus_addr,
 166 -                                          GFP_KERNEL);
 167 -               memset(vc4_plane->fbinfo, 0, sizeof(*vc4_plane->fbinfo));
 168 -
 169 +       if (type == DRM_PLANE_TYPE_PRIMARY)
 170                 drm_plane_helper_add(plane, &vc4_primary_plane_helper_funcs);
 171 -       } else {
 172 +       else
 173                 drm_plane_helper_add(plane, &vc4_cursor_plane_helper_funcs);
 174 -       }
 175 +
 176 +       drm_plane_create_alpha_property(plane);
 177
 178         return plane;
 179  fail: