imx-common: add board_video_skip

this function is shared by several boards and thus can be factorized

Signed-off-by: Eric Bénard <eric@eukrea.com>
Acked-by: Eric Nelson <eric.nelson@boundarydevices.com>
Acked-by: Stefano Babic <sbabic@denx.de>

arch/arm/imx-common/Makefile

@@ -19,6 +19,7 @@ obj-y	+= misc.o
 endif
 ifeq ($(SOC),$(filter $(SOC),mx6))
 obj-$(CONFIG_CMD_SATA) += sata.o
+obj-$(CONFIG_IMX_VIDEO_SKIP) += video.o
 endif
 obj-$(CONFIG_CMD_BMODE) += cmd_bmode.o
 obj-$(CONFIG_CMD_HDMIDETECT) += cmd_hdmidet.o

arch/arm/imx-common/video.c

@@ -0,0 +1,55 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/errno.h>
+#include <asm/imx-common/video.h>
+
+extern struct display_info_t const displays[];
+extern size_t display_count;
+
+int board_video_skip(void)
+{
+	int i;
+	int ret;
+	char const *panel = getenv("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, 0,
+				    displays[i].pixfmt);
+		if (!ret) {
+			displays[i].enable(displays+i);
+			printf("Display: %s (%ux%u)\n",
+			       displays[i].mode.name,
+			       displays[i].mode.xres,
+			       displays[i].mode.yres);
+		} else
+			printf("LCD %s cannot be configured: %d\n",
+			       displays[i].mode.name, ret);
+	} else {
+		printf("unsupported panel %s\n", panel);
+		return -EINVAL;
+	}
+
+	return 0;
+}

arch/arm/include/asm/imx-common/video.h

@@ -0,0 +1,20 @@
+/*
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __IMX_VIDEO_H_
+#define __IMX_VIDEO_H_
+
+#include <linux/fb.h>
+#include <ipu_pixfmt.h>
+
+struct display_info_t {
+	int	bus;
+	int	addr;
+	int	pixfmt;
+	int	(*detect)(struct display_info_t const *dev);
+	void	(*enable)(struct display_info_t const *dev);
+	struct	fb_videomode mode;
+};
+
+#endif