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/*
* (C) Copyright 2012 Stephen Warren
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <common.h>
#include <lcd.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;
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;
u32 end_tag;
};
void lcd_ctrl_init(void *lcdbase)
{
ALLOC_ALIGN_BUFFER(struct msg_query, msg_query, 1, 16);
ALLOC_ALIGN_BUFFER(struct msg_setup, msg_setup, 1, 16);
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;
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;
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 = msg_setup->allocate_buffer.body.resp.fb_address;
}
void lcd_enable(void)
{
}
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