ARM: bcm283x: Allocate all mailbox buffers cacheline aligned
[karo-tx-uboot.git] / drivers / video / bcm2835.c
1 /*
2  * (C) Copyright 2012 Stephen Warren
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  */
6
7 #include <common.h>
8 #include <lcd.h>
9 #include <asm/arch/mbox.h>
10 #include <asm/global_data.h>
11
12 DECLARE_GLOBAL_DATA_PTR;
13
14 /* Global variables that lcd.c expects to exist */
15 vidinfo_t panel_info;
16
17 static u32 bcm2835_pitch;
18
19 struct msg_query {
20         struct bcm2835_mbox_hdr hdr;
21         struct bcm2835_mbox_tag_physical_w_h physical_w_h;
22         u32 end_tag;
23 };
24
25 struct msg_setup {
26         struct bcm2835_mbox_hdr hdr;
27         struct bcm2835_mbox_tag_physical_w_h physical_w_h;
28         struct bcm2835_mbox_tag_virtual_w_h virtual_w_h;
29         struct bcm2835_mbox_tag_depth depth;
30         struct bcm2835_mbox_tag_pixel_order pixel_order;
31         struct bcm2835_mbox_tag_alpha_mode alpha_mode;
32         struct bcm2835_mbox_tag_virtual_offset virtual_offset;
33         struct bcm2835_mbox_tag_overscan overscan;
34         struct bcm2835_mbox_tag_allocate_buffer allocate_buffer;
35         struct bcm2835_mbox_tag_pitch pitch;
36         u32 end_tag;
37 };
38
39 void lcd_ctrl_init(void *lcdbase)
40 {
41         ALLOC_CACHE_ALIGN_BUFFER(struct msg_query, msg_query, 1);
42         ALLOC_CACHE_ALIGN_BUFFER(struct msg_setup, msg_setup, 1);
43         int ret;
44         u32 w, h;
45
46         debug("bcm2835: Query resolution...\n");
47
48         BCM2835_MBOX_INIT_HDR(msg_query);
49         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_query->physical_w_h,
50                                         GET_PHYSICAL_W_H);
51         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_query->hdr);
52         if (ret) {
53                 printf("bcm2835: Could not query display resolution\n");
54                 /* FIXME: How to disable the LCD to prevent errors? hang()? */
55                 return;
56         }
57
58         w = msg_query->physical_w_h.body.resp.width;
59         h = msg_query->physical_w_h.body.resp.height;
60
61         debug("bcm2835: Setting up display for %d x %d\n", w, h);
62
63         BCM2835_MBOX_INIT_HDR(msg_setup);
64         BCM2835_MBOX_INIT_TAG(&msg_setup->physical_w_h, SET_PHYSICAL_W_H);
65         msg_setup->physical_w_h.body.req.width = w;
66         msg_setup->physical_w_h.body.req.height = h;
67         BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_w_h, SET_VIRTUAL_W_H);
68         msg_setup->virtual_w_h.body.req.width = w;
69         msg_setup->virtual_w_h.body.req.height = h;
70         BCM2835_MBOX_INIT_TAG(&msg_setup->depth, SET_DEPTH);
71         msg_setup->depth.body.req.bpp = 16;
72         BCM2835_MBOX_INIT_TAG(&msg_setup->pixel_order, SET_PIXEL_ORDER);
73         msg_setup->pixel_order.body.req.order = BCM2835_MBOX_PIXEL_ORDER_BGR;
74         BCM2835_MBOX_INIT_TAG(&msg_setup->alpha_mode, SET_ALPHA_MODE);
75         msg_setup->alpha_mode.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
76         BCM2835_MBOX_INIT_TAG(&msg_setup->virtual_offset, SET_VIRTUAL_OFFSET);
77         msg_setup->virtual_offset.body.req.x = 0;
78         msg_setup->virtual_offset.body.req.y = 0;
79         BCM2835_MBOX_INIT_TAG(&msg_setup->overscan, SET_OVERSCAN);
80         msg_setup->overscan.body.req.top = 0;
81         msg_setup->overscan.body.req.bottom = 0;
82         msg_setup->overscan.body.req.left = 0;
83         msg_setup->overscan.body.req.right = 0;
84         BCM2835_MBOX_INIT_TAG(&msg_setup->allocate_buffer, ALLOCATE_BUFFER);
85         msg_setup->allocate_buffer.body.req.alignment = 0x100;
86         BCM2835_MBOX_INIT_TAG_NO_REQ(&msg_setup->pitch, GET_PITCH);
87
88         ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg_setup->hdr);
89         if (ret) {
90                 printf("bcm2835: Could not configure display\n");
91                 /* FIXME: How to disable the LCD to prevent errors? hang()? */
92                 return;
93         }
94
95         w = msg_setup->physical_w_h.body.resp.width;
96         h = msg_setup->physical_w_h.body.resp.height;
97         bcm2835_pitch = msg_setup->pitch.body.resp.pitch;
98
99         debug("bcm2835: Final resolution is %d x %d\n", w, h);
100
101         panel_info.vl_col = w;
102         panel_info.vl_row = h;
103         panel_info.vl_bpix = LCD_COLOR16;
104
105         gd->fb_base = msg_setup->allocate_buffer.body.resp.fb_address;
106 }
107
108 void lcd_enable(void)
109 {
110 }
111
112 int lcd_get_size(int *line_length)
113 {
114         *line_length = bcm2835_pitch;
115         return *line_length * panel_info.vl_row;
116 }