+++ /dev/null
-From 3e33fb46eb8791ba39fe4781f278487bcc2c3356 Mon Sep 17 00:00:00 2001
-From: James Hughes <james.hughes@raspberrypi.org>
-Date: Thu, 14 Mar 2019 13:27:54 +0000
-Subject: [PATCH] Pulled in the multi frame buffer support from the Pi3
- repo
-
----
- drivers/video/fbdev/bcm2708_fb.c | 580 +++++++++++++++------
- include/soc/bcm2835/raspberrypi-firmware.h | 4 +
- 2 files changed, 432 insertions(+), 152 deletions(-)
-
---- a/drivers/video/fbdev/bcm2708_fb.c
-+++ b/drivers/video/fbdev/bcm2708_fb.c
-@@ -2,6 +2,7 @@
- * linux/drivers/video/bcm2708_fb.c
- *
- * Copyright (C) 2010 Broadcom
-+ * Copyright (C) 2018 Raspberry Pi (Trading) Ltd
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file COPYING in the main directory of this archive
-@@ -13,6 +14,7 @@
- * Copyright 1999-2001 Jeff Garzik <jgarzik@pobox.com>
- *
- */
-+
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/errno.h>
-@@ -36,6 +38,7 @@
- #include <linux/dma-mapping.h>
- #include <linux/cred.h>
- #include <soc/bcm2835/raspberrypi-firmware.h>
-+#include <linux/mutex.h>
-
- //#define BCM2708_FB_DEBUG
- #define MODULE_NAME "bcm2708_fb"
-@@ -82,62 +85,139 @@ struct bcm2708_fb_stats {
- u32 dma_irqs;
- };
-
-+struct vc4_display_settings_t {
-+ u32 display_num;
-+ u32 width;
-+ u32 height;
-+ u32 pitch;
-+ u32 depth;
-+ u32 virtual_width;
-+ u32 virtual_height;
-+ u32 virtual_width_offset;
-+ u32 virtual_height_offset;
-+ unsigned long fb_bus_address;
-+};
-+
-+struct bcm2708_fb_dev;
-+
- struct bcm2708_fb {
- struct fb_info fb;
- struct platform_device *dev;
-- struct rpi_firmware *fw;
- u32 cmap[16];
- u32 gpu_cmap[256];
-+ struct dentry *debugfs_dir;
-+ struct dentry *debugfs_subdir;
-+ unsigned long fb_bus_address;
-+ struct { u32 base, length; } gpu;
-+ struct vc4_display_settings_t display_settings;
-+ struct debugfs_regset32 screeninfo_regset;
-+ struct bcm2708_fb_dev *fbdev;
-+ unsigned int image_size;
-+ dma_addr_t dma_addr;
-+ void *cpuaddr;
-+};
-+
-+#define MAX_FRAMEBUFFERS 3
-+
-+struct bcm2708_fb_dev {
-+ int firmware_supports_multifb;
-+ /* Protects the DMA system from multiple FB access */
-+ struct mutex dma_mutex;
- int dma_chan;
- int dma_irq;
- void __iomem *dma_chan_base;
-- void *cb_base; /* DMA control blocks */
-- dma_addr_t cb_handle;
-- struct dentry *debugfs_dir;
- wait_queue_head_t dma_waitq;
-- struct bcm2708_fb_stats stats;
-- unsigned long fb_bus_address;
-- struct { u32 base, length; } gpu;
-+ bool disable_arm_alloc;
-+ struct bcm2708_fb_stats dma_stats;
-+ void *cb_base; /* DMA control blocks */
-+ dma_addr_t cb_handle;
-+ int instance_count;
-+ int num_displays;
-+ struct rpi_firmware *fw;
-+ struct bcm2708_fb displays[MAX_FRAMEBUFFERS];
- };
-
- #define to_bcm2708(info) container_of(info, struct bcm2708_fb, fb)
-
- static void bcm2708_fb_debugfs_deinit(struct bcm2708_fb *fb)
- {
-- debugfs_remove_recursive(fb->debugfs_dir);
-- fb->debugfs_dir = NULL;
-+ debugfs_remove_recursive(fb->debugfs_subdir);
-+ fb->debugfs_subdir = NULL;
-+
-+ fb->fbdev->instance_count--;
-+
-+ if (!fb->fbdev->instance_count) {
-+ debugfs_remove_recursive(fb->debugfs_dir);
-+ fb->debugfs_dir = NULL;
-+ }
- }
-
- static int bcm2708_fb_debugfs_init(struct bcm2708_fb *fb)
- {
-+ char buf[3];
-+ struct bcm2708_fb_dev *fbdev = fb->fbdev;
-+
- static struct debugfs_reg32 stats_registers[] = {
-- {
-- "dma_copies",
-- offsetof(struct bcm2708_fb_stats, dma_copies)
-- },
-- {
-- "dma_irqs",
-- offsetof(struct bcm2708_fb_stats, dma_irqs)
-- },
-+ {"dma_copies", offsetof(struct bcm2708_fb_stats, dma_copies)},
-+ {"dma_irqs", offsetof(struct bcm2708_fb_stats, dma_irqs)},
- };
-
-- fb->debugfs_dir = debugfs_create_dir(DRIVER_NAME, NULL);
-+ static struct debugfs_reg32 screeninfo[] = {
-+ {"width", offsetof(struct fb_var_screeninfo, xres)},
-+ {"height", offsetof(struct fb_var_screeninfo, yres)},
-+ {"bpp", offsetof(struct fb_var_screeninfo, bits_per_pixel)},
-+ {"xres_virtual", offsetof(struct fb_var_screeninfo, xres_virtual)},
-+ {"yres_virtual", offsetof(struct fb_var_screeninfo, yres_virtual)},
-+ {"xoffset", offsetof(struct fb_var_screeninfo, xoffset)},
-+ {"yoffset", offsetof(struct fb_var_screeninfo, yoffset)},
-+ };
-+
-+ fb->debugfs_dir = debugfs_lookup(DRIVER_NAME, NULL);
-+
-+ if (!fb->debugfs_dir)
-+ fb->debugfs_dir = debugfs_create_dir(DRIVER_NAME, NULL);
-+
- if (!fb->debugfs_dir) {
-- pr_warn("%s: could not create debugfs entry\n",
-- __func__);
-+ dev_warn(fb->fb.dev, "%s: could not create debugfs folder\n",
-+ __func__);
-+ return -EFAULT;
-+ }
-+
-+ snprintf(buf, sizeof(buf), "%u", fb->display_settings.display_num);
-+
-+ fb->debugfs_subdir = debugfs_create_dir(buf, fb->debugfs_dir);
-+
-+ if (!fb->debugfs_subdir) {
-+ dev_warn(fb->fb.dev, "%s: could not create debugfs entry %u\n",
-+ __func__, fb->display_settings.display_num);
- return -EFAULT;
- }
-
-- fb->stats.regset.regs = stats_registers;
-- fb->stats.regset.nregs = ARRAY_SIZE(stats_registers);
-- fb->stats.regset.base = &fb->stats;
--
-- if (!debugfs_create_regset32("stats", 0444, fb->debugfs_dir,
-- &fb->stats.regset)) {
-- pr_warn("%s: could not create statistics registers\n",
-- __func__);
-+ fbdev->dma_stats.regset.regs = stats_registers;
-+ fbdev->dma_stats.regset.nregs = ARRAY_SIZE(stats_registers);
-+ fbdev->dma_stats.regset.base = &fbdev->dma_stats;
-+
-+ if (!debugfs_create_regset32("dma_stats", 0444, fb->debugfs_subdir,
-+ &fbdev->dma_stats.regset)) {
-+ dev_warn(fb->fb.dev, "%s: could not create statistics registers\n",
-+ __func__);
-+ goto fail;
-+ }
-+
-+ fb->screeninfo_regset.regs = screeninfo;
-+ fb->screeninfo_regset.nregs = ARRAY_SIZE(screeninfo);
-+ fb->screeninfo_regset.base = &fb->fb.var;
-+
-+ if (!debugfs_create_regset32("screeninfo", 0444, fb->debugfs_subdir,
-+ &fb->screeninfo_regset)) {
-+ dev_warn(fb->fb.dev,
-+ "%s: could not create dimensions registers\n",
-+ __func__);
- goto fail;
- }
-+
-+ fbdev->instance_count++;
-+
- return 0;
-
- fail:
-@@ -145,6 +225,20 @@ fail:
- return -EFAULT;
- }
-
-+static void set_display_num(struct bcm2708_fb *fb)
-+{
-+ if (fb && fb->fbdev && fb->fbdev->firmware_supports_multifb) {
-+ u32 tmp = fb->display_settings.display_num;
-+
-+ if (rpi_firmware_property(fb->fbdev->fw,
-+ RPI_FIRMWARE_FRAMEBUFFER_SET_DISPLAY_NUM,
-+ &tmp,
-+ sizeof(tmp)))
-+ dev_warn_once(fb->fb.dev,
-+ "Set display number call failed. Old GPU firmware?");
-+ }
-+}
-+
- static int bcm2708_fb_set_bitfields(struct fb_var_screeninfo *var)
- {
- int ret = 0;
-@@ -222,11 +316,11 @@ static int bcm2708_fb_check_var(struct f
- struct fb_info *info)
- {
- /* info input, var output */
-- print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n",
-+ print_debug("%s(%p) %ux%u (%ux%u), %ul, %u\n",
- __func__, info, info->var.xres, info->var.yres,
- info->var.xres_virtual, info->var.yres_virtual,
-- (int)info->screen_size, info->var.bits_per_pixel);
-- print_debug("%s(%p) %dx%d (%dx%d), %d\n", __func__, var, var->xres,
-+ info->screen_size, info->var.bits_per_pixel);
-+ print_debug("%s(%p) %ux%u (%ux%u), %u\n", __func__, var, var->xres,
- var->yres, var->xres_virtual, var->yres_virtual,
- var->bits_per_pixel);
-
-@@ -283,23 +377,96 @@ static int bcm2708_fb_set_par(struct fb_
- .xoffset = info->var.xoffset,
- .yoffset = info->var.yoffset,
- .tag5 = { RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE, 8, 0 },
-- .base = 0,
-- .screen_size = 0,
-- .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH, 4, 0 },
-- .pitch = 0,
-+ /* base and screen_size will be initialised later */
-+ .tag6 = { RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH, 4, 0 },
-+ /* pitch will be initialised later */
- };
-- int ret;
-+ int ret, image_size;
-+
-
-- print_debug("%s(%p) %dx%d (%dx%d), %d, %d\n", __func__, info,
-+ print_debug("%s(%p) %dx%d (%dx%d), %d, %d (display %d)\n", __func__,
-+ info,
- info->var.xres, info->var.yres, info->var.xres_virtual,
- info->var.yres_virtual, (int)info->screen_size,
-- info->var.bits_per_pixel);
-+ info->var.bits_per_pixel, value);
-+
-+ /* Need to set the display number to act on first
-+ * Cannot do it in the tag list because on older firmware the call
-+ * will fail and stop the rest of the list being executed.
-+ * We can ignore this call failing as the default at other end is 0
-+ */
-+ set_display_num(fb);
-+
-+ /* Try allocating our own buffer. We can specify all the parameters */
-+ image_size = ((info->var.xres * info->var.yres) *
-+ info->var.bits_per_pixel) >> 3;
-+
-+ if (!fb->fbdev->disable_arm_alloc &&
-+ (image_size != fb->image_size || !fb->dma_addr)) {
-+ if (fb->dma_addr) {
-+ dma_free_coherent(info->device, fb->image_size,
-+ fb->cpuaddr, fb->dma_addr);
-+ fb->image_size = 0;
-+ fb->cpuaddr = NULL;
-+ fb->dma_addr = 0;
-+ }
-+
-+ fb->cpuaddr = dma_alloc_coherent(info->device, image_size,
-+ &fb->dma_addr, GFP_KERNEL);
-+
-+ if (!fb->cpuaddr) {
-+ fb->dma_addr = 0;
-+ fb->fbdev->disable_arm_alloc = true;
-+ } else {
-+ fb->image_size = image_size;
-+ }
-+ }
-+
-+ if (fb->cpuaddr) {
-+ fbinfo.base = fb->dma_addr;
-+ fbinfo.screen_size = image_size;
-+ fbinfo.pitch = (info->var.xres * info->var.bits_per_pixel) >> 3;
-+
-+ ret = rpi_firmware_property_list(fb->fbdev->fw, &fbinfo,
-+ sizeof(fbinfo));
-+ if (ret || fbinfo.base != fb->dma_addr) {
-+ /* Firmware either failed, or assigned a different base
-+ * address (ie it doesn't support being passed an FB
-+ * allocation).
-+ * Destroy the allocation, and don't try again.
-+ */
-+ dma_free_coherent(info->device, fb->image_size,
-+ fb->cpuaddr, fb->dma_addr);
-+ fb->image_size = 0;
-+ fb->cpuaddr = NULL;
-+ fb->dma_addr = 0;
-+ fb->fbdev->disable_arm_alloc = true;
-+ }
-+ } else {
-+ /* Our allocation failed - drop into the old scheme of
-+ * allocation by the VPU.
-+ */
-+ ret = -ENOMEM;
-+ }
-
-- ret = rpi_firmware_property_list(fb->fw, &fbinfo, sizeof(fbinfo));
- if (ret) {
-- dev_err(info->device,
-- "Failed to allocate GPU framebuffer (%d)\n", ret);
-- return ret;
-+ /* Old scheme:
-+ * - FRAMEBUFFER_ALLOCATE passes 0 for base and screen_size.
-+ * - GET_PITCH instead of SET_PITCH.
-+ */
-+ fbinfo.base = 0;
-+ fbinfo.screen_size = 0;
-+ fbinfo.tag6.tag = RPI_FIRMWARE_FRAMEBUFFER_GET_PITCH;
-+ fbinfo.pitch = 0;
-+
-+ ret = rpi_firmware_property_list(fb->fbdev->fw, &fbinfo,
-+ sizeof(fbinfo));
-+ if (ret) {
-+ dev_err(info->device,
-+ "Failed to allocate GPU framebuffer (%d)\n",
-+ ret);
-+ return ret;
-+ }
- }
-
- if (info->var.bits_per_pixel <= 8)
-@@ -314,9 +481,17 @@ static int bcm2708_fb_set_par(struct fb_
- fb->fb.fix.smem_start = fbinfo.base;
- fb->fb.fix.smem_len = fbinfo.pitch * fbinfo.yres_virtual;
- fb->fb.screen_size = fbinfo.screen_size;
-- if (fb->fb.screen_base)
-- iounmap(fb->fb.screen_base);
-- fb->fb.screen_base = ioremap_wc(fbinfo.base, fb->fb.screen_size);
-+
-+ if (!fb->dma_addr) {
-+ if (fb->fb.screen_base)
-+ iounmap(fb->fb.screen_base);
-+
-+ fb->fb.screen_base = ioremap_wc(fbinfo.base,
-+ fb->fb.screen_size);
-+ } else {
-+ fb->fb.screen_base = fb->cpuaddr;
-+ }
-+
- if (!fb->fb.screen_base) {
- /* the console may currently be locked */
- console_trylock();
-@@ -374,7 +549,10 @@ static int bcm2708_fb_setcolreg(unsigned
- packet->length = regno + 1;
- memcpy(packet->cmap, fb->gpu_cmap,
- sizeof(packet->cmap));
-- ret = rpi_firmware_property(fb->fw,
-+
-+ set_display_num(fb);
-+
-+ ret = rpi_firmware_property(fb->fbdev->fw,
- RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE,
- packet,
- (2 + packet->length) * sizeof(u32));
-@@ -413,8 +591,11 @@ static int bcm2708_fb_blank(int blank_mo
- return -EINVAL;
- }
-
-- ret = rpi_firmware_property(fb->fw, RPI_FIRMWARE_FRAMEBUFFER_BLANK,
-+ set_display_num(fb);
-+
-+ ret = rpi_firmware_property(fb->fbdev->fw, RPI_FIRMWARE_FRAMEBUFFER_BLANK,
- &value, sizeof(value));
-+
- if (ret)
- dev_err(info->device, "%s(%d) failed: %d\n", __func__,
- blank_mode, ret);
-@@ -431,7 +612,7 @@ static int bcm2708_fb_pan_display(struct
- info->var.yoffset = var->yoffset;
- result = bcm2708_fb_set_par(info);
- if (result != 0)
-- pr_err("%s(%d,%d) returns=%d\n", __func__, var->xoffset,
-+ pr_err("%s(%u,%u) returns=%d\n", __func__, var->xoffset,
- var->yoffset, result);
- return result;
- }
-@@ -439,8 +620,9 @@ static int bcm2708_fb_pan_display(struct
- static void dma_memcpy(struct bcm2708_fb *fb, dma_addr_t dst, dma_addr_t src,
- int size)
- {
-- int burst_size = (fb->dma_chan == 0) ? 8 : 2;
-- struct bcm2708_dma_cb *cb = fb->cb_base;
-+ struct bcm2708_fb_dev *fbdev = fb->fbdev;
-+ struct bcm2708_dma_cb *cb = fbdev->cb_base;
-+ int burst_size = (fbdev->dma_chan == 0) ? 8 : 2;
-
- cb->info = BCM2708_DMA_BURST(burst_size) | BCM2708_DMA_S_WIDTH |
- BCM2708_DMA_S_INC | BCM2708_DMA_D_WIDTH |
-@@ -453,21 +635,27 @@ static void dma_memcpy(struct bcm2708_fb
- cb->pad[1] = 0;
- cb->next = 0;
-
-+ // Not sure what to do if this gets a signal whilst waiting
-+ if (mutex_lock_interruptible(&fbdev->dma_mutex))
-+ return;
-+
- if (size < dma_busy_wait_threshold) {
-- bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
-- bcm_dma_wait_idle(fb->dma_chan_base);
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ bcm_dma_wait_idle(fbdev->dma_chan_base);
- } else {
-- void __iomem *dma_chan = fb->dma_chan_base;
-+ void __iomem *local_dma_chan = fbdev->dma_chan_base;
-
- cb->info |= BCM2708_DMA_INT_EN;
-- bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
-- while (bcm_dma_is_busy(dma_chan)) {
-- wait_event_interruptible(fb->dma_waitq,
-- !bcm_dma_is_busy(dma_chan));
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ while (bcm_dma_is_busy(local_dma_chan)) {
-+ wait_event_interruptible(fbdev->dma_waitq,
-+ !bcm_dma_is_busy(local_dma_chan));
- }
-- fb->stats.dma_irqs++;
-+ fbdev->dma_stats.dma_irqs++;
- }
-- fb->stats.dma_copies++;
-+ fbdev->dma_stats.dma_copies++;
-+
-+ mutex_unlock(&fbdev->dma_mutex);
- }
-
- /* address with no aliases */
-@@ -542,10 +730,13 @@ static int bcm2708_ioctl(struct fb_info
-
- switch (cmd) {
- case FBIO_WAITFORVSYNC:
-- ret = rpi_firmware_property(fb->fw,
-+ set_display_num(fb);
-+
-+ ret = rpi_firmware_property(fb->fbdev->fw,
- RPI_FIRMWARE_FRAMEBUFFER_SET_VSYNC,
- &dummy, sizeof(dummy));
- break;
-+
- case FBIODMACOPY:
- {
- struct fb_dmacopy ioparam;
-@@ -615,23 +806,22 @@ static int bcm2708_compat_ioctl(struct f
- static void bcm2708_fb_fillrect(struct fb_info *info,
- const struct fb_fillrect *rect)
- {
-- /* (is called) print_debug("bcm2708_fb_fillrect\n"); */
- cfb_fillrect(info, rect);
- }
-
- /* A helper function for configuring dma control block */
- static void set_dma_cb(struct bcm2708_dma_cb *cb,
-- int burst_size,
-- dma_addr_t dst,
-- int dst_stride,
-- dma_addr_t src,
-- int src_stride,
-- int w,
-- int h)
-+ int burst_size,
-+ dma_addr_t dst,
-+ int dst_stride,
-+ dma_addr_t src,
-+ int src_stride,
-+ int w,
-+ int h)
- {
- cb->info = BCM2708_DMA_BURST(burst_size) | BCM2708_DMA_S_WIDTH |
-- BCM2708_DMA_S_INC | BCM2708_DMA_D_WIDTH |
-- BCM2708_DMA_D_INC | BCM2708_DMA_TDMODE;
-+ BCM2708_DMA_S_INC | BCM2708_DMA_D_WIDTH |
-+ BCM2708_DMA_D_INC | BCM2708_DMA_TDMODE;
- cb->dst = dst;
- cb->src = src;
- /*
-@@ -649,15 +839,19 @@ static void bcm2708_fb_copyarea(struct f
- const struct fb_copyarea *region)
- {
- struct bcm2708_fb *fb = to_bcm2708(info);
-- struct bcm2708_dma_cb *cb = fb->cb_base;
-+ struct bcm2708_fb_dev *fbdev = fb->fbdev;
-+ struct bcm2708_dma_cb *cb = fbdev->cb_base;
- int bytes_per_pixel = (info->var.bits_per_pixel + 7) >> 3;
-
- /* Channel 0 supports larger bursts and is a bit faster */
-- int burst_size = (fb->dma_chan == 0) ? 8 : 2;
-+ int burst_size = (fbdev->dma_chan == 0) ? 8 : 2;
- int pixels = region->width * region->height;
-
-- /* Fallback to cfb_copyarea() if we don't like something */
-- if (bytes_per_pixel > 4 ||
-+ /* If DMA is currently in use (ie being used on another FB), then
-+ * rather than wait for it to finish, just use the cfb_copyarea
-+ */
-+ if (!mutex_trylock(&fbdev->dma_mutex) ||
-+ bytes_per_pixel > 4 ||
- info->var.xres * info->var.yres > 1920 * 1200 ||
- region->width <= 0 || region->width > info->var.xres ||
- region->height <= 0 || region->height > info->var.yres ||
-@@ -684,8 +878,8 @@ static void bcm2708_fb_copyarea(struct f
- * 1920x1200 resolution at 32bpp pixel depth.
- */
- int y;
-- dma_addr_t control_block_pa = fb->cb_handle;
-- dma_addr_t scratchbuf = fb->cb_handle + 16 * 1024;
-+ dma_addr_t control_block_pa = fbdev->cb_handle;
-+ dma_addr_t scratchbuf = fbdev->cb_handle + 16 * 1024;
- int scanline_size = bytes_per_pixel * region->width;
- int scanlines_per_cb = (64 * 1024 - 16 * 1024) / scanline_size;
-
-@@ -735,10 +929,10 @@ static void bcm2708_fb_copyarea(struct f
- }
- set_dma_cb(cb, burst_size,
- fb->fb_bus_address + dy * fb->fb.fix.line_length +
-- bytes_per_pixel * region->dx,
-+ bytes_per_pixel * region->dx,
- stride,
- fb->fb_bus_address + sy * fb->fb.fix.line_length +
-- bytes_per_pixel * region->sx,
-+ bytes_per_pixel * region->sx,
- stride,
- region->width * bytes_per_pixel,
- region->height);
-@@ -748,32 +942,33 @@ static void bcm2708_fb_copyarea(struct f
- cb->next = 0;
-
- if (pixels < dma_busy_wait_threshold) {
-- bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
-- bcm_dma_wait_idle(fb->dma_chan_base);
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ bcm_dma_wait_idle(fbdev->dma_chan_base);
- } else {
-- void __iomem *dma_chan = fb->dma_chan_base;
-+ void __iomem *local_dma_chan = fbdev->dma_chan_base;
-
- cb->info |= BCM2708_DMA_INT_EN;
-- bcm_dma_start(fb->dma_chan_base, fb->cb_handle);
-- while (bcm_dma_is_busy(dma_chan)) {
-- wait_event_interruptible(fb->dma_waitq,
-- !bcm_dma_is_busy(dma_chan));
-+ bcm_dma_start(fbdev->dma_chan_base, fbdev->cb_handle);
-+ while (bcm_dma_is_busy(local_dma_chan)) {
-+ wait_event_interruptible(fbdev->dma_waitq,
-+ !bcm_dma_is_busy(local_dma_chan));
- }
-- fb->stats.dma_irqs++;
-+ fbdev->dma_stats.dma_irqs++;
- }
-- fb->stats.dma_copies++;
-+ fbdev->dma_stats.dma_copies++;
-+
-+ mutex_unlock(&fbdev->dma_mutex);
- }
-
- static void bcm2708_fb_imageblit(struct fb_info *info,
- const struct fb_image *image)
- {
-- /* (is called) print_debug("bcm2708_fb_imageblit\n"); */
- cfb_imageblit(info, image);
- }
-
- static irqreturn_t bcm2708_fb_dma_irq(int irq, void *cxt)
- {
-- struct bcm2708_fb *fb = cxt;
-+ struct bcm2708_fb_dev *fbdev = cxt;
-
- /* FIXME: should read status register to check if this is
- * actually interrupting us or not, in case this interrupt
-@@ -783,9 +978,9 @@ static irqreturn_t bcm2708_fb_dma_irq(in
- */
-
- /* acknowledge the interrupt */
-- writel(BCM2708_DMA_INT, fb->dma_chan_base + BCM2708_DMA_CS);
-+ writel(BCM2708_DMA_INT, fbdev->dma_chan_base + BCM2708_DMA_CS);
-
-- wake_up(&fb->dma_waitq);
-+ wake_up(&fbdev->dma_waitq);
- return IRQ_HANDLED;
- }
-
-@@ -821,11 +1016,23 @@ static int bcm2708_fb_register(struct bc
- fb->fb.fix.ywrapstep = 0;
- fb->fb.fix.accel = FB_ACCEL_NONE;
-
-- fb->fb.var.xres = fbwidth;
-- fb->fb.var.yres = fbheight;
-- fb->fb.var.xres_virtual = fbwidth;
-- fb->fb.var.yres_virtual = fbheight;
-- fb->fb.var.bits_per_pixel = fbdepth;
-+ /* If we have data from the VC4 on FB's, use that, otherwise use the
-+ * module parameters
-+ */
-+ if (fb->display_settings.width) {
-+ fb->fb.var.xres = fb->display_settings.width;
-+ fb->fb.var.yres = fb->display_settings.height;
-+ fb->fb.var.xres_virtual = fb->fb.var.xres;
-+ fb->fb.var.yres_virtual = fb->fb.var.yres;
-+ fb->fb.var.bits_per_pixel = fb->display_settings.depth;
-+ } else {
-+ fb->fb.var.xres = fbwidth;
-+ fb->fb.var.yres = fbheight;
-+ fb->fb.var.xres_virtual = fbwidth;
-+ fb->fb.var.yres_virtual = fbheight;
-+ fb->fb.var.bits_per_pixel = fbdepth;
-+ }
-+
- fb->fb.var.vmode = FB_VMODE_NONINTERLACED;
- fb->fb.var.activate = FB_ACTIVATE_NOW;
- fb->fb.var.nonstd = 0;
-@@ -841,26 +1048,23 @@ static int bcm2708_fb_register(struct bc
- fb->fb.monspecs.dclkmax = 100000000;
-
- bcm2708_fb_set_bitfields(&fb->fb.var);
-- init_waitqueue_head(&fb->dma_waitq);
-
- /*
- * Allocate colourmap.
- */
--
- fb_set_var(&fb->fb, &fb->fb.var);
-+
- ret = bcm2708_fb_set_par(&fb->fb);
-+
- if (ret)
- return ret;
-
-- print_debug("BCM2708FB: registering framebuffer (%dx%d@%d) (%d)\n",
-- fbwidth, fbheight, fbdepth, fbswap);
--
- ret = register_framebuffer(&fb->fb);
-- print_debug("BCM2708FB: register framebuffer (%d)\n", ret);
-+
- if (ret == 0)
- goto out;
-
-- print_debug("BCM2708FB: cannot register framebuffer (%d)\n", ret);
-+ dev_warn(fb->fb.dev, "Unable to register framebuffer (%d)\n", ret);
- out:
- return ret;
- }
-@@ -869,10 +1073,18 @@ static int bcm2708_fb_probe(struct platf
- {
- struct device_node *fw_np;
- struct rpi_firmware *fw;
-- struct bcm2708_fb *fb;
-- int ret;
-+ int ret, i;
-+ u32 num_displays;
-+ struct bcm2708_fb_dev *fbdev;
-+ struct { u32 base, length; } gpu_mem;
-+
-+ fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
-+
-+ if (!fbdev)
-+ return -ENOMEM;
-
- fw_np = of_parse_phandle(dev->dev.of_node, "firmware", 0);
-+
- /* Remove comment when booting without Device Tree is no longer supported
- * if (!fw_np) {
- * dev_err(&dev->dev, "Missing firmware node\n");
-@@ -880,90 +1092,154 @@ static int bcm2708_fb_probe(struct platf
- * }
- */
- fw = rpi_firmware_get(fw_np);
-+ fbdev->fw = fw;
-+
- if (!fw)
- return -EPROBE_DEFER;
-
-- fb = kzalloc(sizeof(*fb), GFP_KERNEL);
-- if (!fb) {
-- ret = -ENOMEM;
-- goto free_region;
-+ ret = rpi_firmware_property(fw,
-+ RPI_FIRMWARE_FRAMEBUFFER_GET_NUM_DISPLAYS,
-+ &num_displays, sizeof(u32));
-+
-+ /* If we fail to get the number of displays, or it returns 0, then
-+ * assume old firmware that doesn't have the mailbox call, so just
-+ * set one display
-+ */
-+ if (ret || num_displays == 0) {
-+ num_displays = 1;
-+ dev_err(&dev->dev,
-+ "Unable to determine number of FB's. Assuming 1\n");
-+ ret = 0;
-+ } else {
-+ fbdev->firmware_supports_multifb = 1;
- }
-
-- fb->fw = fw;
-- bcm2708_fb_debugfs_init(fb);
-+ if (num_displays > MAX_FRAMEBUFFERS) {
-+ dev_warn(&dev->dev,
-+ "More displays reported from firmware than supported in driver (%u vs %u)",
-+ num_displays, MAX_FRAMEBUFFERS);
-+ num_displays = MAX_FRAMEBUFFERS;
-+ }
-
-- fb->cb_base = dma_alloc_writecombine(&dev->dev, SZ_64K,
-- &fb->cb_handle, GFP_KERNEL);
-- if (!fb->cb_base) {
-+ dev_info(&dev->dev, "FB found %d display(s)\n", num_displays);
-+
-+ /* Set up the DMA information. Note we have just one set of DMA
-+ * parameters to work with all the FB's so requires synchronising when
-+ * being used
-+ */
-+
-+ mutex_init(&fbdev->dma_mutex);
-+
-+ fbdev->cb_base = dma_alloc_writecombine(&dev->dev, SZ_64K,
-+ &fbdev->cb_handle,
-+ GFP_KERNEL);
-+ if (!fbdev->cb_base) {
- dev_err(&dev->dev, "cannot allocate DMA CBs\n");
- ret = -ENOMEM;
- goto free_fb;
- }
-
-- pr_info("BCM2708FB: allocated DMA memory %pad\n", &fb->cb_handle);
--
- ret = bcm_dma_chan_alloc(BCM_DMA_FEATURE_BULK,
-- &fb->dma_chan_base, &fb->dma_irq);
-+ &fbdev->dma_chan_base,
-+ &fbdev->dma_irq);
- if (ret < 0) {
-- dev_err(&dev->dev, "couldn't allocate a DMA channel\n");
-+ dev_err(&dev->dev, "Couldn't allocate a DMA channel\n");
- goto free_cb;
- }
-- fb->dma_chan = ret;
-+ fbdev->dma_chan = ret;
-
-- ret = request_irq(fb->dma_irq, bcm2708_fb_dma_irq,
-- 0, "bcm2708_fb dma", fb);
-+ ret = request_irq(fbdev->dma_irq, bcm2708_fb_dma_irq,
-+ 0, "bcm2708_fb DMA", fbdev);
- if (ret) {
-- pr_err("%s: failed to request DMA irq\n", __func__);
-+ dev_err(&dev->dev,
-+ "Failed to request DMA irq\n");
- goto free_dma_chan;
- }
-
-- pr_info("BCM2708FB: allocated DMA channel %d\n", fb->dma_chan);
-+ rpi_firmware_property(fbdev->fw,
-+ RPI_FIRMWARE_GET_VC_MEMORY,
-+ &gpu_mem, sizeof(gpu_mem));
-+
-+ for (i = 0; i < num_displays; i++) {
-+ struct bcm2708_fb *fb = &fbdev->displays[i];
-+
-+ fb->display_settings.display_num = i;
-+ fb->dev = dev;
-+ fb->fb.device = &dev->dev;
-+ fb->fbdev = fbdev;
-+
-+ fb->gpu.base = gpu_mem.base;
-+ fb->gpu.length = gpu_mem.length;
-+
-+ if (fbdev->firmware_supports_multifb) {
-+ ret = rpi_firmware_property(fw,
-+ RPI_FIRMWARE_FRAMEBUFFER_GET_DISPLAY_SETTINGS,
-+ &fb->display_settings,
-+ GET_DISPLAY_SETTINGS_PAYLOAD_SIZE);
-+ } else {
-+ memset(&fb->display_settings, 0,
-+ sizeof(fb->display_settings));
-+ }
-+
-+ ret = bcm2708_fb_register(fb);
-
-- fb->dev = dev;
-- fb->fb.device = &dev->dev;
-+ if (ret == 0) {
-+ bcm2708_fb_debugfs_init(fb);
-
-- /* failure here isn't fatal, but we'll fail in vc_mem_copy if
-- * fb->gpu is not valid
-- */
-- rpi_firmware_property(fb->fw, RPI_FIRMWARE_GET_VC_MEMORY, &fb->gpu,
-- sizeof(fb->gpu));
-+ fbdev->num_displays++;
-
-- ret = bcm2708_fb_register(fb);
-- if (ret == 0) {
-- platform_set_drvdata(dev, fb);
-- goto out;
-+ dev_info(&dev->dev,
-+ "Registered framebuffer for display %u, size %ux%u\n",
-+ fb->display_settings.display_num,
-+ fb->fb.var.xres,
-+ fb->fb.var.yres);
-+ } else {
-+ // Use this to flag if this FB entry is in use.
-+ fb->fbdev = NULL;
-+ }
-+ }
-+
-+ // Did we actually successfully create any FB's?
-+ if (fbdev->num_displays) {
-+ init_waitqueue_head(&fbdev->dma_waitq);
-+ platform_set_drvdata(dev, fbdev);
-+ return ret;
- }
-
- free_dma_chan:
-- bcm_dma_chan_free(fb->dma_chan);
-+ bcm_dma_chan_free(fbdev->dma_chan);
- free_cb:
-- dma_free_writecombine(&dev->dev, SZ_64K, fb->cb_base, fb->cb_handle);
-+ dma_free_writecombine(&dev->dev, SZ_64K, fbdev->cb_base,
-+ fbdev->cb_handle);
- free_fb:
-- kfree(fb);
--free_region:
- dev_err(&dev->dev, "probe failed, err %d\n", ret);
--out:
-+
- return ret;
- }
-
- static int bcm2708_fb_remove(struct platform_device *dev)
- {
-- struct bcm2708_fb *fb = platform_get_drvdata(dev);
-+ struct bcm2708_fb_dev *fbdev = platform_get_drvdata(dev);
-+ int i;
-
- platform_set_drvdata(dev, NULL);
-
-- if (fb->fb.screen_base)
-- iounmap(fb->fb.screen_base);
-- unregister_framebuffer(&fb->fb);
--
-- dma_free_writecombine(&dev->dev, SZ_64K, fb->cb_base, fb->cb_handle);
-- bcm_dma_chan_free(fb->dma_chan);
--
-- bcm2708_fb_debugfs_deinit(fb);
-+ for (i = 0; i < fbdev->num_displays; i++) {
-+ if (fbdev->displays[i].fb.screen_base)
-+ iounmap(fbdev->displays[i].fb.screen_base);
-+
-+ if (fbdev->displays[i].fbdev) {
-+ unregister_framebuffer(&fbdev->displays[i].fb);
-+ bcm2708_fb_debugfs_deinit(&fbdev->displays[i]);
-+ }
-+ }
-
-- free_irq(fb->dma_irq, fb);
-+ dma_free_writecombine(&dev->dev, SZ_64K, fbdev->cb_base,
-+ fbdev->cb_handle);
-+ bcm_dma_chan_free(fbdev->dma_chan);
-+ free_irq(fbdev->dma_irq, fbdev);
-
-- kfree(fb);
-+ mutex_destroy(&fbdev->dma_mutex);
-
- return 0;
- }
-@@ -978,10 +1254,10 @@ static struct platform_driver bcm2708_fb
- .probe = bcm2708_fb_probe,
- .remove = bcm2708_fb_remove,
- .driver = {
-- .name = DRIVER_NAME,
-- .owner = THIS_MODULE,
-- .of_match_table = bcm2708_fb_of_match_table,
-- },
-+ .name = DRIVER_NAME,
-+ .owner = THIS_MODULE,
-+ .of_match_table = bcm2708_fb_of_match_table,
-+ },
- };
-
- static int __init bcm2708_fb_init(void)
---- a/include/soc/bcm2835/raspberrypi-firmware.h
-+++ b/include/soc/bcm2835/raspberrypi-firmware.h
-@@ -138,9 +138,11 @@ enum rpi_firmware_property_tag {
- RPI_FIRMWARE_FRAMEBUFFER_SET_DEPTH = 0x00048005,
- RPI_FIRMWARE_FRAMEBUFFER_SET_PIXEL_ORDER = 0x00048006,
- RPI_FIRMWARE_FRAMEBUFFER_SET_ALPHA_MODE = 0x00048007,
-+ RPI_FIRMWARE_FRAMEBUFFER_SET_PITCH = 0x00048008,
- RPI_FIRMWARE_FRAMEBUFFER_SET_VIRTUAL_OFFSET = 0x00048009,
- RPI_FIRMWARE_FRAMEBUFFER_SET_OVERSCAN = 0x0004800a,
- RPI_FIRMWARE_FRAMEBUFFER_SET_PALETTE = 0x0004800b,
-+
- RPI_FIRMWARE_FRAMEBUFFER_SET_TOUCHBUF = 0x0004801f,
- RPI_FIRMWARE_FRAMEBUFFER_SET_GPIOVIRTBUF = 0x00048020,
- RPI_FIRMWARE_FRAMEBUFFER_SET_VSYNC = 0x0004800e,
-@@ -159,6 +161,8 @@ enum rpi_firmware_property_tag {
- RPI_FIRMWARE_GET_DMA_CHANNELS = 0x00060001,
- };
-
-+#define GET_DISPLAY_SETTINGS_PAYLOAD_SIZE 64
-+
- #if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
- int rpi_firmware_property(struct rpi_firmware *fw,
- u32 tag, void *data, size_t len);
projects / openwrt / staging / chunkeey.git / blobdiff