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video: fbdev: starfive: workaround for unavailable pointer of dtb

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Fix sf_fb_map_video_memory in starfive_fb.c
This commit is contained in:
jack.zhu 2021-03-16 23:53:55 +08:00 • committed by Emil Renner Berthing
parent 461413540d
commit 0c90600daa
1 changed files with 14 additions and 9 deletions
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23
drivers/video/fbdev/starfive/starfive_fb.c
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@ -37,8 +37,10 @@
#include <asm/irq.h>
#include <asm/div64.h>
#include <asm/cacheflush.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_reserved_mem.h>
#include <linux/of_address.h>
#include <video/stf-vin.h>
#include "starfive_fb.h"
@ -636,18 +638,21 @@ static struct fb_ops sf_fb_ops = {
static int sf_fb_map_video_memory(struct sf_fb_data *sf_dev)
{
int ret;
dma_addr_t fb_phys_addr = 0;
struct resource res_mem;
struct device_node *node;
ret = of_reserved_mem_device_init(sf_dev->dev);
if(ret) {
dev_err(sf_dev->dev, "Could not get reserved memory\n");
return ret;
node = of_parse_phandle(sf_dev->dev->of_node, "memory-region", 0);
if(node) {
of_address_to_resource(node, 0, &res_mem);
sf_dev->fb.screen_size = resource_size(&res_mem);
sf_dev->fb.fix.smem_start = res_mem.start;
} else {
dev_err(sf_dev->dev, "Could not get reserved memory.\n");
return -ENOMEM;
}
sf_dev->fb.screen_base = dma_alloc_coherent(sf_dev->dev, FB_MEM_SIZE, &fb_phys_addr, GFP_KERNEL);
sf_dev->fb.screen_size = FB_MEM_SIZE;
sf_dev->fb.fix.smem_start = fb_phys_addr;
sf_dev->fb.screen_base = devm_ioremap_resource(sf_dev->dev, &res_mem);
memset(sf_dev->fb.screen_base, 0, sf_dev->fb.screen_size);
return 0;
}