blob: cd605e632cb606c84754c24b6ca1590db9a22ab7 [file] [log] [blame]
Stephen Warren6be3c9f2013-01-29 16:37:40 +00001/*
2 * (C) Copyright 2012 Stephen Warren
3 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02004 * SPDX-License-Identifier: GPL-2.0+
Stephen Warren6be3c9f2013-01-29 16:37:40 +00005 */
6
7#include <common.h>
8#include <lcd.h>
Simon Glasscf92e052015-09-02 17:24:58 -06009#include <memalign.h>
Stephen Warren13826482016-02-06 10:42:43 -070010#include <phys2bus.h>
Stephen Warren6be3c9f2013-01-29 16:37:40 +000011#include <asm/arch/mbox.h>
12#include <asm/global_data.h>
13
14DECLARE_GLOBAL_DATA_PTR;
15
16/* Global variables that lcd.c expects to exist */
Stephen Warren6be3c9f2013-01-29 16:37:40 +000017vidinfo_t panel_info;
Stephen Warren6be3c9f2013-01-29 16:37:40 +000018
Andre Heider44376ef2013-11-09 11:07:53 +010019static u32 bcm2835_pitch;
20
Stephen Warren6be3c9f2013-01-29 16:37:40 +000021struct msg_query {
22 struct bcm2835_mbox_hdr hdr;
23 struct bcm2835_mbox_tag_physical_w_h physical_w_h;
24 u32 end_tag;
25};
26
27struct msg_setup {
28 struct bcm2835_mbox_hdr hdr;
29 struct bcm2835_mbox_tag_physical_w_h physical_w_h;
30 struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
31 struct bcm2835_mbox_tag_depth depth;
32 struct bcm2835_mbox_tag_pixel_order pixel_order;
33 struct bcm2835_mbox_tag_alpha_mode alpha_mode;
34 struct bcm2835_mbox_tag_virtual_offset virtual_offset;
35 struct bcm2835_mbox_tag_overscan overscan;
36 struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
Andre Heider44376ef2013-11-09 11:07:53 +010037 struct bcm2835_mbox_tag_pitch pitch;
Stephen Warren6be3c9f2013-01-29 16:37:40 +000038 u32 end_tag;
39};
40
41void lcd_ctrl_init(void *lcdbase)
42{
Alexander Stein927753a2015-07-24 09:22:12 +020043 ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
44 ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
Stephen Warren6be3c9f2013-01-29 16:37:40 +000045 int ret;
46 u32 w, h;
Alexander Graf99de2542016-03-24 10:31:11 +010047 u32 fb_start, fb_end;
Stephen Warren6be3c9f2013-01-29 16:37:40 +000048
49 debug("bcm2835: Query resolution...\n");
50
51 BCM2835_MBOX_INIT_HDR(msg_query);
52 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
53 GET_PHYSICAL_W_H);
54 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
55 if (ret) {
56 printf("bcm2835: Could not query display resolution\n");
57 /* FIXME: How to disable the LCD to prevent errors? hang()? */
58 return;
59 }
60
61 w = msg_query->physical_w_h.body.resp.width;
62 h = msg_query->physical_w_h.body.resp.height;
63
64 debug("bcm2835: Setting up display for %d x %d\n", w, h);
65
66 BCM2835_MBOX_INIT_HDR(msg_setup);
67 BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
68 msg_setup->physical_w_h.body.req.width = w;
69 msg_setup->physical_w_h.body.req.height = h;
70 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
71 msg_setup->virtual_w_h.body.req.width = w;
72 msg_setup->virtual_w_h.body.req.height = h;
73 BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
74 msg_setup->depth.body.req.bpp = 16;
75 BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
76 msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
77 BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
78 msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
79 BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
80 msg_setup->virtual_offset.body.req.x = 0;
81 msg_setup->virtual_offset.body.req.y = 0;
82 BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
83 msg_setup->overscan.body.req.top = 0;
84 msg_setup->overscan.body.req.bottom = 0;
85 msg_setup->overscan.body.req.left = 0;
86 msg_setup->overscan.body.req.right = 0;
87 BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
88 msg_setup->allocate_buffer.body.req.alignment = 0x100;
Andre Heider44376ef2013-11-09 11:07:53 +010089 BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
Stephen Warren6be3c9f2013-01-29 16:37:40 +000090
91 ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
92 if (ret) {
93 printf("bcm2835: Could not configure display\n");
94 /* FIXME: How to disable the LCD to prevent errors? hang()? */
95 return;
96 }
97
98 w = msg_setup->physical_w_h.body.resp.width;
99 h = msg_setup->physical_w_h.body.resp.height;
Andre Heider44376ef2013-11-09 11:07:53 +0100100 bcm2835_pitch = msg_setup->pitch.body.resp.pitch;
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000101
102 debug("bcm2835: Final resolution is %d x %d\n", w, h);
103
104 panel_info.vl_col = w;
105 panel_info.vl_row = h;
106 panel_info.vl_bpix = LCD_COLOR16;
107
Stephen Warren13826482016-02-06 10:42:43 -0700108 gd->fb_base = bus_to_phys(
109 msg_setup->allocate_buffer.body.resp.fb_address);
Alexander Graf99de2542016-03-24 10:31:11 +0100110
111 /* Enable dcache for the frame buffer */
112 fb_start = gd->fb_base & ~(MMU_SECTION_SIZE - 1);
113 fb_end = gd->fb_base + msg_setup->allocate_buffer.body.resp.fb_size;
114 fb_end = ALIGN(fb_end, 1 << MMU_SECTION_SHIFT);
115 mmu_set_region_dcache_behaviour(fb_start, fb_end - fb_start,
116 DCACHE_WRITEBACK);
117 lcd_set_flush_dcache(1);
Stephen Warren6be3c9f2013-01-29 16:37:40 +0000118}
119
120void lcd_enable(void)
121{
122}
Andre Heider44376ef2013-11-09 11:07:53 +0100123
124int lcd_get_size(int *line_length)
125{
126 *line_length = bcm2835_pitch;
127 return *line_length * panel_info.vl_row;
128}