video: fbdev: starfive: Fix frame buffer reserved memory resource con…

…flict

    starfive,vpp-lcdc 12000000.sfivefb: can't request region for resource [mem 0xfb000000-0xfcffffff]
    starfive,vpp-lcdc 12000000.sfivefb: Fail to allocate video RAM
    starfive,vpp-lcdc 12000000.sfivefb: starfive fb init fail
    starfive,vpp-lcdc 12000000.sfivefb: fb info init FAIL
    starfive,vpp-lcdc: probe of 12000000.sfivefb failed with error -16

devm_ioremap_resource() calls devm_request_mem_region(), which fails as
the reserved memory for the frame buffer is already present in the
resource list, cfr. /proc/iomem:

    fb000000-fcffffff : Reserved

Fix this by mapping the frame buffer memory using devm_ioremap().

Signed-off-by: Geert Uytterhoeven <[email protected]>

drivers/video/fbdev/starfive/starfive_fb.c

@@ -656,7 +656,8 @@ static int sf_fb_map_video_memory(struct sf_fb_data *sf_dev)
 	sf_dev->fb.screen_size = resource_size(&res_mem);
 	sf_dev->fb.fix.smem_start = res_mem.start;
 
-	sf_dev->fb.screen_base = devm_ioremap_resource(sf_dev->dev, &res_mem);
+	sf_dev->fb.screen_base = devm_ioremap(sf_dev->dev, res_mem.start,
+					      resource_size(&res_mem));
 	if (IS_ERR(sf_dev->fb.screen_base))
 		return PTR_ERR(sf_dev->fb.screen_base);