mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 02:08:38 +00:00
1382648b6b
The FB address is generated by the firmware running on the GPU/VideoCore and is a "bus" address. This address is the other side of an IOMMU from the ARM upon which U-Boot is running. Use bus_to_phys() to convert this to an ARM physical address. Without this, U-Boot seems to work just fine, but once the Linux kernel boots on an RPi2, accessing the FB memory often causes a hard system hang. This is related to:122426d46eARM: bcm2835: use phys_to_bus() for mbox5c0beb5c58usb: dwc2: use phys_to_bus/bus_to_phys79340db7f1ARM: bcm2835: implement phys_to_bus/bus_to_phys Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*
|
|
* (C) Copyright 2012 Stephen Warren
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <lcd.h>
|
|
#include <memalign.h>
|
|
#include <phys2bus.h>
|
|
#include <asm/arch/mbox.h>
|
|
#include <asm/global_data.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* Global variables that lcd.c expects to exist */
|
|
vidinfo_t panel_info;
|
|
|
|
static u32 bcm2835_pitch;
|
|
|
|
struct msg_query {
|
|
struct bcm2835_mbox_hdr hdr;
|
|
struct bcm2835_mbox_tag_physical_w_h physical_w_h;
|
|
u32 end_tag;
|
|
};
|
|
|
|
struct msg_setup {
|
|
struct bcm2835_mbox_hdr hdr;
|
|
struct bcm2835_mbox_tag_physical_w_h physical_w_h;
|
|
struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
|
|
struct bcm2835_mbox_tag_depth depth;
|
|
struct bcm2835_mbox_tag_pixel_order pixel_order;
|
|
struct bcm2835_mbox_tag_alpha_mode alpha_mode;
|
|
struct bcm2835_mbox_tag_virtual_offset virtual_offset;
|
|
struct bcm2835_mbox_tag_overscan overscan;
|
|
struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
|
|
struct bcm2835_mbox_tag_pitch pitch;
|
|
u32 end_tag;
|
|
};
|
|
|
|
void lcd_ctrl_init(void *lcdbase)
|
|
{
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
|
|
ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
|
|
int ret;
|
|
u32 w, h;
|
|
|
|
debug("bcm2835: Query resolution...\n");
|
|
|
|
BCM2835_MBOX_INIT_HDR(msg_query);
|
|
BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
|
|
GET_PHYSICAL_W_H);
|
|
ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
|
|
if (ret) {
|
|
printf("bcm2835: Could not query display resolution\n");
|
|
/* FIXME: How to disable the LCD to prevent errors? hang()? */
|
|
return;
|
|
}
|
|
|
|
w = msg_query->physical_w_h.body.resp.width;
|
|
h = msg_query->physical_w_h.body.resp.height;
|
|
|
|
debug("bcm2835: Setting up display for %d x %d\n", w, h);
|
|
|
|
BCM2835_MBOX_INIT_HDR(msg_setup);
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
|
|
msg_setup->physical_w_h.body.req.width = w;
|
|
msg_setup->physical_w_h.body.req.height = h;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
|
|
msg_setup->virtual_w_h.body.req.width = w;
|
|
msg_setup->virtual_w_h.body.req.height = h;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
|
|
msg_setup->depth.body.req.bpp = 16;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
|
|
msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
|
|
msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
|
|
msg_setup->virtual_offset.body.req.x = 0;
|
|
msg_setup->virtual_offset.body.req.y = 0;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
|
|
msg_setup->overscan.body.req.top = 0;
|
|
msg_setup->overscan.body.req.bottom = 0;
|
|
msg_setup->overscan.body.req.left = 0;
|
|
msg_setup->overscan.body.req.right = 0;
|
|
BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
|
|
msg_setup->allocate_buffer.body.req.alignment = 0x100;
|
|
BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
|
|
|
|
ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
|
|
if (ret) {
|
|
printf("bcm2835: Could not configure display\n");
|
|
/* FIXME: How to disable the LCD to prevent errors? hang()? */
|
|
return;
|
|
}
|
|
|
|
w = msg_setup->physical_w_h.body.resp.width;
|
|
h = msg_setup->physical_w_h.body.resp.height;
|
|
bcm2835_pitch = msg_setup->pitch.body.resp.pitch;
|
|
|
|
debug("bcm2835: Final resolution is %d x %d\n", w, h);
|
|
|
|
panel_info.vl_col = w;
|
|
panel_info.vl_row = h;
|
|
panel_info.vl_bpix = LCD_COLOR16;
|
|
|
|
gd->fb_base = bus_to_phys(
|
|
msg_setup->allocate_buffer.body.resp.fb_address);
|
|
}
|
|
|
|
void lcd_enable(void)
|
|
{
|
|
}
|
|
|
|
int lcd_get_size(int *line_length)
|
|
{
|
|
*line_length = bcm2835_pitch;
|
|
return *line_length * panel_info.vl_row;
|
|
}
|