GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/arm/mach-imx/video.c

@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <common.h>
+#include <env.h>
+#include <linux/errno.h>
+#include <asm/mach-imx/video.h>
+
+#ifdef CONFIG_IMX_HDMI
+#include <asm/arch/mxc_hdmi.h>
+#include <asm/io.h>
+
+int detect_hdmi(struct display_info_t const *dev)
+{
+	struct hdmi_regs *hdmi	= (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
+	return readb(&hdmi->phy_stat0) & HDMI_DVI_STAT;
+}
+#endif
+
+int board_video_skip(void)
+{
+	int i;
+	int ret = 0;
+	char const *panel = env_get("panel");
+
+	if (!panel) {
+		for (i = 0; i < display_count; i++) {
+			struct display_info_t const *dev = displays+i;
+			if (dev->detect && dev->detect(dev)) {
+				panel = dev->mode.name;
+				printf("auto-detected panel %s\n", panel);
+				break;
+			}
+		}
+		if (!panel) {
+			panel = displays[0].mode.name;
+			printf("No panel detected: default to %s\n", panel);
+			i = 0;
+		}
+	} else {
+		for (i = 0; i < display_count; i++) {
+			if (!strcmp(panel, displays[i].mode.name))
+				break;
+		}
+	}
+
+	if (i < display_count) {
+		ret = ipuv3_fb_init(&displays[i].mode, displays[i].di ? 1 : 0,
+				    displays[i].pixfmt);
+		if (!ret) {
+			if (displays[i].enable)
+				displays[i].enable(displays + i);
+
+			printf("Display: %s (%ux%u)\n",
+			       displays[i].mode.name,
+			       displays[i].mode.xres,
+			       displays[i].mode.yres);
+
+#ifdef CONFIG_IMX_HDMI
+			if (!strcmp(displays[i].mode.name, "HDMI"))
+				imx_enable_hdmi_phy();
+#endif
+		} else
+			printf("LCD %s cannot be configured: %d\n",
+			       displays[i].mode.name, ret);
+	} else {
+		printf("unsupported panel %s\n", panel);
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+int ipu_displays_init(void)
+{
+	return board_video_skip();
+}