add lvds1024*800

hc

2024-01-31 f70575805708cabdedea7498aaa3f710fde4d920

 kernel/drivers/video/fbdev/platinumfb.c
..
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@@ -32,9 +32,7 @@
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 #include <linux/nvram.h>
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 #include <linux/of_device.h>
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 #include <linux/of_platform.h>
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-#include <asm/io.h>
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 #include <asm/prom.h>
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-#include <asm/pgtable.h>
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 #include "macmodes.h"
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 #include "platinumfb.h"
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@@ -98,7 +96,7 @@
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  * Interface used by the world
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  */
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-static struct fb_ops platinumfb_ops = {
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+static const struct fb_ops platinumfb_ops = {
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 	.owner =	THIS_MODULE,
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 	.fb_check_var	= platinumfb_check_var,
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 	.fb_set_par	= platinumfb_set_par,
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@@ -347,23 +345,18 @@
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 	sense = read_platinum_sense(pinfo);
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 	printk(KERN_INFO "platinumfb: Monitor sense value = 0x%x, ", sense);
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-	if (default_vmode == VMODE_NVRAM) {
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-#ifdef CONFIG_NVRAM
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+
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+	if (IS_REACHABLE(CONFIG_NVRAM) && default_vmode == VMODE_NVRAM)
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 		default_vmode = nvram_read_byte(NV_VMODE);
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-		if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
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-		    !platinum_reg_init[default_vmode-1])
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-#endif
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-			default_vmode = VMODE_CHOOSE;
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-	}
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-	if (default_vmode == VMODE_CHOOSE) {
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+	if (default_vmode <= 0 || default_vmode > VMODE_MAX ||
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+	    !platinum_reg_init[default_vmode - 1]) {
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 		default_vmode = mac_map_monitor_sense(sense);
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+		if (!platinum_reg_init[default_vmode - 1])
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+			default_vmode = VMODE_640_480_60;
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 	}
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-	if (default_vmode <= 0 || default_vmode > VMODE_MAX)
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-		default_vmode = VMODE_640_480_60;
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-#ifdef CONFIG_NVRAM
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-	if (default_cmode == CMODE_NVRAM)
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+
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+	if (IS_REACHABLE(CONFIG_NVRAM) && default_cmode == CMODE_NVRAM)
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 		default_cmode = nvram_read_byte(NV_CMODE);
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-#endif
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 	if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
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 		default_cmode = CMODE_8;
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 	/*
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@@ -545,10 +538,9 @@
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 	dev_info(&odev->dev, "Found Apple Platinum video hardware\n");
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 	info = framebuffer_alloc(sizeof(*pinfo), &odev->dev);
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-	if (info == NULL) {
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-		dev_err(&odev->dev, "Failed to allocate fbdev !\n");
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+	if (!info)
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 		return -ENOMEM;
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-	}
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+
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 	pinfo = info->par;
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 	if (of_address_to_resource(dp, 0, &pinfo->rsrc_reg) ||
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@@ -577,8 +569,7 @@
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 	/* frame buffer - map only 4MB */
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 	pinfo->frame_buffer_phys = pinfo->rsrc_fb.start;
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-	pinfo->frame_buffer = __ioremap(pinfo->rsrc_fb.start, 0x400000,
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-					_PAGE_WRITETHRU);
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+	pinfo->frame_buffer = ioremap_wt(pinfo->rsrc_fb.start, 0x400000);
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 	pinfo->base_frame_buffer = pinfo->frame_buffer;
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 	/* registers */