disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/rockchip/rockchip_drm_debugfs.c
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@@ -56,7 +56,7 @@
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 int rockchip_drm_dump_plane_buffer(struct vop_dump_info *dump_info, int frame_count)
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 {
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 	int flags;
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-	int bpp = 32;
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+	int bpp;
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 	const char *ptr;
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 	char file_name[100];
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 	int width;
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@@ -70,6 +70,10 @@
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 	drm_get_format_name(dump_info->format->format, &format_name);
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 	strscpy(format, format_name.str, 5);
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 	bpp = rockchip_drm_get_bpp(dump_info->format);
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+	if (!bpp) {
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+		DRM_WARN("invalid bpp %d\n", bpp);
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+		return 0;
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+	}
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 	if (dump_info->yuv_format) {
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 		u8 hsub = dump_info->format->hsub;