On 2022-08-12 16:56, Mukul Joshi wrote:
There are no backing hardware registers for ih_soft ring.
As a result, don't try to access hardware registers for read
and write pointers when processing interrupts on the IH soft
ring.
Signed-off-by: Mukul Joshi <mukul.joshi@xxxxxxx>
The patch looks good to me. But you probably should apply the same
changes to vega10_ih.c and navi10_ih.c as well.
Regards,
Felix
---
drivers/gpu/drm/amd/amdgpu/vega20_ih.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
index 3b4eb8285943..2022ffbb8dba 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
@@ -385,9 +385,11 @@ static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
u32 wptr, tmp;
struct amdgpu_ih_regs *ih_regs;
- if (ih == &adev->irq.ih) {
+ if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
/* Only ring0 supports writeback. On other rings fall back
* to register-based code with overflow checking below.
+ * ih_soft ring doesn't have any backing hardware registers,
+ * update wptr and return.
*/
wptr = le32_to_cpu(*ih->wptr_cpu);
@@ -461,6 +463,9 @@ static void vega20_ih_set_rptr(struct amdgpu_device *adev,
{
struct amdgpu_ih_regs *ih_regs;
+ if (ih == &adev->irq.ih_soft)
+ return;
+
if (ih->use_doorbell) {
/* XXX check if swapping is necessary on BE */
*ih->rptr_cpu = ih->rptr;
