On 12/01/2022 15:33, Xianting Tian wrote:

For example, memory-region in .dts as below, reg = <0x0 0x50000000 0x0 0x20000000>

We can get below values, struct resource r; r.start = 0x50000000; r.end = 0x6fffffff;

So the size should be: size = r.end - r.start + 1 = 0x20000000

Signed-off-by: Xianting Tian xianting.tian@linux.alibaba.com

Fixes: 072f1f9168ed ("drm/msm: add support for "stolen" mem") Reviewed-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org

---

drivers/gpu/drm/msm/msm_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index 892c04365..f04a2337d 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -466,7 +466,7 @@ static int msm_init_vram(struct drm_device *dev) of_node_put(node); if (ret) return ret;

• size = r.end - r.start;
  

• size = r.end - r.start + 1;
  

  DRM_INFO("using VRAM carveout: %lx@%pa\n", size, &r.start);

/* if we have no IOMMU, then we need to use carveout allocator.