On 07/02/2020 06:26, Nicolas Boichat wrote: > It is useful to know which component cannot be powered on. > > Signed-off-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx> > Reviewed-by: Steven Price <steven.price@xxxxxxx> > Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@xxxxxxxxxxxxx> Reviewed-by: Matthias Brugger <mbrugger@xxxxxxxx> > --- > > Was useful when trying to probe Bifrost GPU, to understand what > issue we are facing. > > v4: > - No change > v3: > - Rebased on https://patchwork.kernel.org/patch/11325689/ > > drivers/gpu/drm/panfrost/panfrost_gpu.c | 11 +++++++---- > 1 file changed, 7 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c > index 460fc190de6e815..856f2fd1fa8ed27 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c > @@ -308,17 +308,20 @@ void panfrost_gpu_power_on(struct panfrost_device *pfdev) > gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present); > ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO, > val, val == pfdev->features.l2_present, 100, 1000); > + if (ret) > + dev_err(pfdev->dev, "error powering up gpu L2"); > > gpu_write(pfdev, SHADER_PWRON_LO, pfdev->features.shader_present); > - ret |= readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO, > + ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO, > val, val == pfdev->features.shader_present, 100, 1000); > + if (ret) > + dev_err(pfdev->dev, "error powering up gpu shader"); > > gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present); > - ret |= readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO, > + ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO, > val, val == pfdev->features.tiler_present, 100, 1000); > - > if (ret) > - dev_err(pfdev->dev, "error powering up gpu"); > + dev_err(pfdev->dev, "error powering up gpu tiler"); > } > > void panfrost_gpu_power_off(struct panfrost_device *pfdev) >
