/* * (C) Copyright 2012 Stephen Warren * * SPDX-License-Identifier: GPL-2.0+ */ #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; 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_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; 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 = 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; }