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7#include <common.h>
8#include <lcd.h>
9#include <asm/arch/mbox.h>
10#include <asm/global_data.h>
11
12DECLARE_GLOBAL_DATA_PTR;
13
14
15vidinfo_t panel_info;
16
17static u32 bcm2835_pitch;
18
19struct 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
25struct 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
39void lcd_ctrl_init(void *lcdbase)
40{
41 ALLOC_ALIGN_BUFFER(struct msg_query, msg_query, 1, 16);
42 ALLOC_ALIGN_BUFFER(struct msg_setup, msg_setup, 1, 16);
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
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
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
108void lcd_enable(void)
109{
110}
111
112int lcd_get_size(int *line_length)
113{
114 *line_length = bcm2835_pitch;
115 return *line_length * panel_info.vl_row;
116}
117
