diff options
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c index 0989aee3dd2c..1bc40d667281 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c @@ -100,12 +100,10 @@ static int a6xx_hfi_queue_write(struct a6xx_gmu *gmu, return 0; } -static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum, - u32 *payload, u32 payload_size) +static int a6xx_hfi_wait_for_msg_interrupt(struct a6xx_gmu *gmu, u32 id, u32 seqnum) { - struct a6xx_hfi_queue *queue = &gmu->queues[HFI_RESPONSE_QUEUE]; - u32 val; int ret; + u32 val; /* Wait for a response */ ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val, @@ -122,6 +120,19 @@ static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum, gmu_write(gmu, REG_A6XX_GMU_GMU2HOST_INTR_CLR, A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ); + return 0; +} + +static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum, + u32 *payload, u32 payload_size) +{ + struct a6xx_hfi_queue *queue = &gmu->queues[HFI_RESPONSE_QUEUE]; + int ret; + + ret = a6xx_hfi_wait_for_msg_interrupt(gmu, id, seqnum); + if (ret) + return ret; + for (;;) { struct a6xx_hfi_msg_response resp; @@ -129,12 +140,18 @@ static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum, ret = a6xx_hfi_queue_read(gmu, queue, (u32 *) &resp, sizeof(resp) >> 2); - /* If the queue is empty our response never made it */ + /* If the queue is empty, there may have been previous missed + * responses that preceded the response to our packet. Wait + * further before we give up. + */ if (!ret) { - DRM_DEV_ERROR(gmu->dev, - "The HFI response queue is unexpectedly empty\n"); - - return -ENOENT; + ret = a6xx_hfi_wait_for_msg_interrupt(gmu, id, seqnum); + if (ret) { + DRM_DEV_ERROR(gmu->dev, + "The HFI response queue is unexpectedly empty\n"); + return ret; + } + continue; } if (HFI_HEADER_ID(resp.header) == HFI_F2H_MSG_ERROR) { |