fbdev: atafb: Fix broken frame buffer after kexec (80cf9635) · Commits · 戴 / test

On Falcon, Atari frame buffer initialization relies on preprogrammed register values. These register values are changed to blank the console. Hence when using kexec to boot into a new kernel while the console is blanked, the new kernel cannot determine the current video configuration, and the Atari frame buffer driver fails to initialize: atafb: phys_screen_base 6ce000 screen_len 4096 Fix this by doing a straight-forward conversion of the driver to a platform device driver, and adding a shutdown handler that unblanks the display. Signed-off-by:

Geert Uytterhoeven <geert@linux-m68k.org> Cc: Michael Schmitz <schmitzmic@gmail.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by:

Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/atafb.c

+30 −4

Original line number	Diff line number	Diff line
		@@ -54,6 +54,7 @@
		#include <linux/delay.h>
		#include <linux/init.h>
		#include <linux/interrupt.h>
		#include <linux/platform_device.h>

		#include <asm/setup.h>
		#include <linux/uaccess.h>
		@@ -3072,7 +3073,7 @@ int __init atafb_setup(char *options)
		return 0;
		}

		int __init atafb_init(void)
		static int __init atafb_probe(struct platform_device *pdev)
		{
		int pad, detected_mode, error;
		unsigned int defmode = 0;
		@@ -3084,9 +3085,6 @@ int __init atafb_init(void)
		atafb_setup(option);
		printk("atafb_init: start\n");

		if (!MACH_IS_ATARI)
		return -ENODEV;

		do {
		#ifdef ATAFB_EXT
		if (external_addr) {
		@@ -3247,4 +3245,32 @@ int __init atafb_init(void)
		return 0;
		}

		static void atafb_shutdown(struct platform_device *pdev)
		{
		/* Unblank before kexec */
		if (fbhw->blank)
		fbhw->blank(0);
		}

		static struct platform_driver atafb_driver = {
		.shutdown = atafb_shutdown,
		.driver = {
		.name = "atafb",
		},
		};

		static int __init atafb_init(void)
		{
		struct platform_device *pdev;

		if (!MACH_IS_ATARI)
		return -ENODEV;

		pdev = platform_device_register_simple("atafb", -1, NULL, 0);
		if (IS_ERR(pdev))
		return PTR_ERR(pdev);

		return platform_driver_probe(&atafb_driver, atafb_probe);
		}

		device_initcall(atafb_init);

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