mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Allwinner LCD driver
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*
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* (C) Copyright 2017 Vasily Khoruzhick <anarsoul@gmail.com>
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*/
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#include <common.h>
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#include <display.h>
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#include <video_bridge.h>
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#include <backlight.h>
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#include <dm.h>
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#include <edid.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/lcdc.h>
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#include <asm/arch/gpio.h>
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#include <asm/gpio.h>
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struct sunxi_lcd_priv {
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struct display_timing timing;
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int panel_bpp;
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};
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static void sunxi_lcdc_config_pinmux(void)
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{
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#ifdef CONFIG_MACH_SUN50I
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int pin;
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for (pin = SUNXI_GPD(0); pin <= SUNXI_GPD(21); pin++) {
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sunxi_gpio_set_cfgpin(pin, SUNXI_GPD_LCD0);
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sunxi_gpio_set_drv(pin, 3);
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}
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#endif
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}
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static int sunxi_lcd_enable(struct udevice *dev, int bpp,
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const struct display_timing *edid)
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{
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struct sunxi_ccm_reg * const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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struct sunxi_lcdc_reg * const lcdc =
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(struct sunxi_lcdc_reg *)SUNXI_LCD0_BASE;
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struct sunxi_lcd_priv *priv = dev_get_priv(dev);
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struct udevice *backlight;
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int clk_div, clk_double, ret;
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/* Reset off */
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setbits_le32(&ccm->ahb_reset1_cfg, 1 << AHB_RESET_OFFSET_LCD0);
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/* Clock on */
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setbits_le32(&ccm->ahb_gate1, 1 << AHB_GATE_OFFSET_LCD0);
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lcdc_init(lcdc);
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sunxi_lcdc_config_pinmux();
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lcdc_pll_set(ccm, 0, edid->pixelclock.typ / 1000,
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&clk_div, &clk_double, false);
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lcdc_tcon0_mode_set(lcdc, edid, clk_div, false,
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priv->panel_bpp, CONFIG_VIDEO_LCD_DCLK_PHASE);
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lcdc_enable(lcdc, priv->panel_bpp);
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ret = uclass_get_device(UCLASS_PANEL_BACKLIGHT, 0, &backlight);
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if (!ret)
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backlight_enable(backlight);
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return 0;
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}
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static int sunxi_lcd_read_timing(struct udevice *dev,
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struct display_timing *timing)
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{
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struct sunxi_lcd_priv *priv = dev_get_priv(dev);
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memcpy(timing, &priv->timing, sizeof(struct display_timing));
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return 0;
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}
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static int sunxi_lcd_probe(struct udevice *dev)
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{
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struct udevice *cdev;
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struct sunxi_lcd_priv *priv = dev_get_priv(dev);
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int ret;
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int node, timing_node, val;
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#ifdef CONFIG_VIDEO_BRIDGE
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/* Try to get timings from bridge first */
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ret = uclass_get_device(UCLASS_VIDEO_BRIDGE, 0, &cdev);
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if (!ret) {
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u8 edid[EDID_SIZE];
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int channel_bpp;
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ret = video_bridge_attach(cdev);
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if (ret) {
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debug("video bridge attach failed: %d\n", ret);
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return ret;
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}
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ret = video_bridge_read_edid(cdev, edid, EDID_SIZE);
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if (ret > 0) {
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ret = edid_get_timing(edid, ret,
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&priv->timing, &channel_bpp);
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priv->panel_bpp = channel_bpp * 3;
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if (!ret)
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return ret;
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}
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}
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#endif
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/* Fallback to timings from DT if there's no bridge or
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* if reading EDID failed
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*/
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ret = uclass_get_device(UCLASS_PANEL, 0, &cdev);
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if (ret) {
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debug("video panel not found: %d\n", ret);
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return ret;
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}
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if (fdtdec_decode_display_timing(gd->fdt_blob, dev_of_offset(cdev),
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0, &priv->timing)) {
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debug("%s: Failed to decode display timing\n", __func__);
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return -EINVAL;
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}
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timing_node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(cdev),
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"display-timings");
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node = fdt_first_subnode(gd->fdt_blob, timing_node);
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val = fdtdec_get_int(gd->fdt_blob, node, "bits-per-pixel", -1);
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if (val != -1)
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priv->panel_bpp = val;
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else
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priv->panel_bpp = 18;
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return 0;
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}
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static const struct dm_display_ops sunxi_lcd_ops = {
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.read_timing = sunxi_lcd_read_timing,
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.enable = sunxi_lcd_enable,
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};
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U_BOOT_DRIVER(sunxi_lcd) = {
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.name = "sunxi_lcd",
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.id = UCLASS_DISPLAY,
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.ops = &sunxi_lcd_ops,
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.probe = sunxi_lcd_probe,
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.priv_auto_alloc_size = sizeof(struct sunxi_lcd_priv),
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};
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#ifdef CONFIG_MACH_SUN50I
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U_BOOT_DEVICE(sunxi_lcd) = {
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.name = "sunxi_lcd"
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};
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#endif
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