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160 lines
5.0 KiB
Diff
160 lines
5.0 KiB
Diff
From b3fe618a47d770f6c9808ade14360fd81a599789 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Wed, 19 Jun 2019 03:55:50 +0100
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Subject: [PATCH] video/bcm2708_fb: Revert cma allocation attempt
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"4600e91 Pulled in the multi frame buffer support from the Pi3 repo"
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pulled back in the code for allocating the framebuffer from the CMA
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heap.
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Revert it again.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/video/fbdev/bcm2708_fb.c | 101 +++------------------
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include/soc/bcm2835/raspberrypi-firmware.h | 1 -
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2 files changed, 13 insertions(+), 89 deletions(-)
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--- a/drivers/video/fbdev/bcm2708_fb.c
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+++ b/drivers/video/fbdev/bcm2708_fb.c
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@@ -112,9 +112,6 @@ struct bcm2708_fb {
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struct vc4_display_settings_t display_settings;
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struct debugfs_regset32 screeninfo_regset;
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struct bcm2708_fb_dev *fbdev;
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- unsigned int image_size;
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- dma_addr_t dma_addr;
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- void *cpuaddr;
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};
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#define MAX_FRAMEBUFFERS 3
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@@ -377,12 +374,12 @@ static int bcm2708_fb_set_par(struct fb_
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.xoffset = info->var.xoffset,
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.yoffset = info->var.yoffset,
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.tag5 = { RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE, 8, 0 },
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- /* base and screen_size will be initialised later */
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- .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH, 4, 0 },
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- /* pitch will be initialised later */
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+ .base = 0,
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+ .screen_size = 0,
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+ .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH, 4, 0 },
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+ .pitch = 0,
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};
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- int ret, image_size;
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-
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+ int ret;
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print_debug("%s(%p) %dx%d (%dx%d), %d, %d (display %d)\n", __func__,
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info,
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@@ -397,76 +394,12 @@ static int bcm2708_fb_set_par(struct fb_
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*/
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set_display_num(fb);
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- /* Try allocating our own buffer. We can specify all the parameters */
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- image_size = ((info->var.xres * info->var.yres) *
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- info->var.bits_per_pixel) >> 3;
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-
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- if (!fb->fbdev->disable_arm_alloc &&
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- (image_size != fb->image_size || !fb->dma_addr)) {
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- if (fb->dma_addr) {
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- dma_free_coherent(info->device, fb->image_size,
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- fb->cpuaddr, fb->dma_addr);
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- fb->image_size = 0;
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- fb->cpuaddr = NULL;
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- fb->dma_addr = 0;
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- }
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-
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- fb->cpuaddr = dma_alloc_coherent(info->device, image_size,
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- &fb->dma_addr, GFP_KERNEL);
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-
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- if (!fb->cpuaddr) {
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- fb->dma_addr = 0;
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- fb->fbdev->disable_arm_alloc = true;
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- } else {
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- fb->image_size = image_size;
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- }
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- }
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-
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- if (fb->cpuaddr) {
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- fbinfo.base = fb->dma_addr;
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- fbinfo.screen_size = image_size;
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- fbinfo.pitch = (info->var.xres * info->var.bits_per_pixel) >> 3;
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-
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- ret = rpi_firmware_property_list(fb->fbdev->fw, &fbinfo,
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- sizeof(fbinfo));
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- if (ret || fbinfo.base != fb->dma_addr) {
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- /* Firmware either failed, or assigned a different base
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- * address (ie it doesn't support being passed an FB
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- * allocation).
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- * Destroy the allocation, and don't try again.
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- */
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- dma_free_coherent(info->device, fb->image_size,
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- fb->cpuaddr, fb->dma_addr);
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- fb->image_size = 0;
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- fb->cpuaddr = NULL;
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- fb->dma_addr = 0;
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- fb->fbdev->disable_arm_alloc = true;
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- }
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- } else {
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- /* Our allocation failed - drop into the old scheme of
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- * allocation by the VPU.
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- */
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- ret = -ENOMEM;
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- }
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-
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+ ret = rpi_firmware_property_list(fb->fbdev->fw, &fbinfo,
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+ sizeof(fbinfo));
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if (ret) {
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- /* Old scheme:
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- * - FRAMEBUFFER_ALLOCATE passes 0 for base and screen_size.
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- * - GET_PITCH instead of SET_PITCH.
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- */
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- fbinfo.base = 0;
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- fbinfo.screen_size = 0;
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- fbinfo.tag6.tag = RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH;
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- fbinfo.pitch = 0;
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-
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- ret = rpi_firmware_property_list(fb->fbdev->fw, &fbinfo,
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- sizeof(fbinfo));
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- if (ret) {
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- dev_err(info->device,
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- "Failed to allocate GPU framebuffer (%d)\n",
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- ret);
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- return ret;
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- }
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+ dev_err(info->device,
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+ "Failed to allocate GPU framebuffer (%d)\n", ret);
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+ return ret;
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}
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if (info->var.bits_per_pixel <= 8)
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@@ -481,17 +414,9 @@ static int bcm2708_fb_set_par(struct fb_
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fb->fb.fix.smem_start = fbinfo.base;
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fb->fb.fix.smem_len = fbinfo.pitch * fbinfo.yres_virtual;
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fb->fb.screen_size = fbinfo.screen_size;
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-
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- if (!fb->dma_addr) {
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- if (fb->fb.screen_base)
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- iounmap(fb->fb.screen_base);
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-
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- fb->fb.screen_base = ioremap_wc(fbinfo.base,
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- fb->fb.screen_size);
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- } else {
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- fb->fb.screen_base = fb->cpuaddr;
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- }
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-
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+ if (fb->fb.screen_base)
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+ iounmap(fb->fb.screen_base);
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+ fb->fb.screen_base = ioremap_wc(fbinfo.base, fb->fb.screen_size);
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if (!fb->fb.screen_base) {
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/* the console may currently be locked */
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console_trylock();
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -138,7 +138,6 @@ enum rpi_firmware_property_tag {
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RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH = 0x00048005,
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RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER = 0x00048006,
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RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE = 0x00048007,
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- RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH = 0x00048008,
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RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET = 0x00048009,
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RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN = 0x0004800a,
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RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE = 0x0004800b,
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