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openwrt/target/linux/bcm27xx/patches-4.19/950-0555-Pulled-in-the-multi-frame-buffer-support-from-the-Pi.patch
Adrian Schmutzler 7d7aa2fd92 brcm2708: rename target to bcm27xx 
This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-02-14 14:10:51 +01:00

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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);
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