diff options
Diffstat (limited to 'drivers/gpu/drm/msm/adreno/a5xx_gpu.c')
| -rw-r--r-- | drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index a3c778df23a8..1471676b8b84 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -686,11 +686,18 @@ static int a5xx_hw_init(struct msm_gpu *gpu) gpu->funcs->flush(gpu, gpu->rb[0]); if (!a5xx_idle(gpu, gpu->rb[0])) return -EINVAL; - } else { - /* Print a warning so if we die, we know why */ + } else if (ret == -ENODEV) { + /* + * This device does not use zap shader (but print a warning + * just in case someone got their dt wrong.. hopefully they + * have a debug UART to realize the error of their ways... + * if you mess this up you are about to crash horribly) + */ dev_warn_once(gpu->dev->dev, "Zap shader not enabled - using SECVID_TRUST_CNTL instead\n"); gpu_write(gpu, REG_A5XX_RBBM_SECVID_TRUST_CNTL, 0x0); + } else { + return ret; } /* Last step - yield the ringbuffer */ @@ -1312,6 +1319,10 @@ static unsigned long a5xx_gpu_busy(struct msm_gpu *gpu) { u64 busy_cycles, busy_time; + /* Only read the gpu busy if the hardware is already active */ + if (pm_runtime_get_if_in_use(&gpu->pdev->dev) == 0) + return 0; + busy_cycles = gpu_read64(gpu, REG_A5XX_RBBM_PERFCTR_RBBM_0_LO, REG_A5XX_RBBM_PERFCTR_RBBM_0_HI); @@ -1320,6 +1331,8 @@ static unsigned long a5xx_gpu_busy(struct msm_gpu *gpu) gpu->devfreq.busy_cycles = busy_cycles; + pm_runtime_put(&gpu->pdev->dev); + if (WARN_ON(busy_time > ~0LU)) return ~0LU; |