target/linux/brcm2708/patches-4.19/950-0491-Revert-video-bcm2708_fb-Try-allocating-on-the-ARM-an.patch

   1 From 0c9e8983c1ab986a833e8b5fbe180f06957529ad Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.org>
   3 Date: Mon, 13 May 2019 17:34:29 +0100
   4 Subject: [PATCH 491/725] Revert "video: bcm2708_fb: Try allocating on the ARM
   5  and passing to VPU"
   6
   7 This reverts commit ca36c709fce57e8023d2b8b354376bf161601a49.
   8
   9 The driver tries a cma_alloc to avoid using gpu_mem, but should
  10 that fail the core code is logging an error with no easy way to
  11 test whether it will succeed or fail first.
  12
  13 Revert until we either totally give up on gpu_mem and increase
  14 CMA always, or find a way to try an allocation.
  15
  16 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
  17 ---
  18  drivers/video/fbdev/bcm2708_fb.c           | 102 +++------------------
  19  include/soc/bcm2835/raspberrypi-firmware.h |   1 -
  20  2 files changed, 12 insertions(+), 91 deletions(-)
  21
  22 --- a/drivers/video/fbdev/bcm2708_fb.c
  23 +++ b/drivers/video/fbdev/bcm2708_fb.c
  24 @@ -98,11 +98,6 @@ struct bcm2708_fb {
  25         struct bcm2708_fb_stats stats;
  26         unsigned long fb_bus_address;
  27         struct { u32 base, length; } gpu;
  28 -
  29 -       bool disable_arm_alloc;
  30 -       unsigned int image_size;
  31 -       dma_addr_t dma_addr;
  32 -       void *cpuaddr;
  33  };
  34
  35  #define to_bcm2708(info)       container_of(info, struct bcm2708_fb, fb)
  36 @@ -288,88 +283,23 @@ static int bcm2708_fb_set_par(struct fb_
  37                         .xoffset = info->var.xoffset,
  38                         .yoffset = info->var.yoffset,
  39                 .tag5 = { RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE, 8, 0 },
  40 -                       /* base and screen_size will be initialised later */
  41 -               .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH, 4, 0 },
  42 -                       /* pitch will be initialised later */
  43 +                       .base = 0,
  44 +                       .screen_size = 0,
  45 +               .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH, 4, 0 },
  46 +                       .pitch = 0,
  47         };
  48 -       int ret, image_size;
  49 -
  50 +       int ret;
  51
  52         print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n", __func__, info,
  53                     info->var.xres, info->var.yres, info->var.xres_virtual,
  54                     info->var.yres_virtual, (int)info->screen_size,
  55                     info->var.bits_per_pixel);
  56
  57 -       /* Try allocating our own buffer. We can specify all the parameters */
  58 -       image_size = ((info->var.xres * info->var.yres) *
  59 -                     info->var.bits_per_pixel) >> 3;
  60 -
  61 -       if (!fb->disable_arm_alloc &&
  62 -           (image_size != fb->image_size || !fb->dma_addr)) {
  63 -               if (fb->dma_addr) {
  64 -                       dma_free_coherent(info->device, fb->image_size,
  65 -                                         fb->cpuaddr, fb->dma_addr);
  66 -                       fb->image_size = 0;
  67 -                       fb->cpuaddr = NULL;
  68 -                       fb->dma_addr = 0;
  69 -               }
  70 -
  71 -               fb->cpuaddr = dma_alloc_coherent(info->device, image_size,
  72 -                                                &fb->dma_addr, GFP_KERNEL);
  73 -
  74 -               if (!fb->cpuaddr) {
  75 -                       fb->dma_addr = 0;
  76 -                       fb->disable_arm_alloc = true;
  77 -               } else {
  78 -                       fb->image_size = image_size;
  79 -               }
  80 -       }
  81 -
  82 -       if (fb->cpuaddr) {
  83 -               fbinfo.base = fb->dma_addr;
  84 -               fbinfo.screen_size = image_size;
  85 -               fbinfo.pitch = (info->var.xres * info->var.bits_per_pixel) >> 3;
  86 -
  87 -               ret = rpi_firmware_property_list(fb->fw, &fbinfo,
  88 -                                                sizeof(fbinfo));
  89 -               if (ret || fbinfo.base != fb->dma_addr) {
  90 -                       /* Firmware either failed, or assigned a different base
  91 -                        * address (ie it doesn't support being passed an FB
  92 -                        * allocation).
  93 -                        * Destroy the allocation, and don't try again.
  94 -                        */
  95 -                       dma_free_coherent(info->device, fb->image_size,
  96 -                                         fb->cpuaddr, fb->dma_addr);
  97 -                       fb->image_size = 0;
  98 -                       fb->cpuaddr = NULL;
  99 -                       fb->dma_addr = 0;
 100 -                       fb->disable_arm_alloc = true;
 101 -               }
 102 -       } else {
 103 -               /* Our allocation failed - drop into the old scheme of
 104 -                * allocation by the VPU.
 105 -                */
 106 -               ret = -ENOMEM;
 107 -       }
 108 -
 109 +       ret = rpi_firmware_property_list(fb->fw, &fbinfo, sizeof(fbinfo));
 110         if (ret) {
 111 -               /* Old scheme:
 112 -                * - FRAMEBUFFER_ALLOCATE passes 0 for base and screen_size.
 113 -                * - GET_PITCH instead of SET_PITCH.
 114 -                */
 115 -               fbinfo.base = 0;
 116 -               fbinfo.screen_size = 0;
 117 -               fbinfo.tag6.tag = RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH;
 118 -               fbinfo.pitch = 0;
 119 -
 120 -               ret = rpi_firmware_property_list(fb->fw, &fbinfo,
 121 -                                                sizeof(fbinfo));
 122 -               if (ret) {
 123 -                       dev_err(info->device,
 124 -                               "Failed to allocate GPU framebuffer (%d)\n",
 125 -                               ret);
 126 -                       return ret;
 127 -               }
 128 +               dev_err(info->device,
 129 +                       "Failed to allocate GPU framebuffer (%d)\n", ret);
 130 +               return ret;
 131         }
 132
 133         if (info->var.bits_per_pixel <= 8)
 134 @@ -384,17 +314,9 @@ static int bcm2708_fb_set_par(struct fb_
 135         fb->fb.fix.smem_start = fbinfo.base;
 136         fb->fb.fix.smem_len = fbinfo.pitch * fbinfo.yres_virtual;
 137         fb->fb.screen_size = fbinfo.screen_size;
 138 -
 139 -       if (!fb->dma_addr) {
 140 -               if (fb->fb.screen_base)
 141 -                       iounmap(fb->fb.screen_base);
 142 -
 143 -               fb->fb.screen_base = ioremap_wc(fbinfo.base,
 144 -                                               fb->fb.screen_size);
 145 -       } else {
 146 -               fb->fb.screen_base = fb->cpuaddr;
 147 -       }
 148 -
 149 +       if (fb->fb.screen_base)
 150 +               iounmap(fb->fb.screen_base);
 151 +       fb->fb.screen_base = ioremap_wc(fbinfo.base, fb->fb.screen_size);
 152         if (!fb->fb.screen_base) {
 153                 /* the console may currently be locked */
 154                 console_trylock();
 155 --- a/include/soc/bcm2835/raspberrypi-firmware.h
 156 +++ b/include/soc/bcm2835/raspberrypi-firmware.h
 157 @@ -128,7 +128,6 @@ enum rpi_firmware_property_tag {
 158         RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH =                  0x00048005,
 159         RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER =            0x00048006,
 160         RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE =             0x00048007,
 161 -       RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH =                  0x00048008,
 162         RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET =         0x00048009,
 163         RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN =               0x0004800a,
 164         RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE =                0x0004800b,