diff options
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_gpu.c | 64 |
1 files changed, 46 insertions, 18 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c index f0be7e19b13e..97f097ee5c1d 100644 --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c @@ -362,28 +362,38 @@ unsigned long long panfrost_cycle_counter_read(struct panfrost_device *pfdev) return ((u64)hi << 32) | lo; } +static u64 panfrost_get_core_mask(struct panfrost_device *pfdev) +{ + u64 core_mask; + + if (pfdev->features.l2_present == 1) + return U64_MAX; + + /* + * Only support one core group now. + * ~(l2_present - 1) unsets all bits in l2_present except + * the bottom bit. (l2_present - 2) has all the bits in + * the first core group set. AND them together to generate + * a mask of cores in the first core group. + */ + core_mask = ~(pfdev->features.l2_present - 1) & + (pfdev->features.l2_present - 2); + dev_info_once(pfdev->dev, "using only 1st core group (%lu cores from %lu)\n", + hweight64(core_mask), + hweight64(pfdev->features.shader_present)); + + return core_mask; +} + void panfrost_gpu_power_on(struct panfrost_device *pfdev) { int ret; u32 val; - u64 core_mask = U64_MAX; + u64 core_mask; panfrost_gpu_init_quirks(pfdev); + core_mask = panfrost_get_core_mask(pfdev); - if (pfdev->features.l2_present != 1) { - /* - * Only support one core group now. - * ~(l2_present - 1) unsets all bits in l2_present except - * the bottom bit. (l2_present - 2) has all the bits in - * the first core group set. AND them together to generate - * a mask of cores in the first core group. - */ - core_mask = ~(pfdev->features.l2_present - 1) & - (pfdev->features.l2_present - 2); - dev_info_once(pfdev->dev, "using only 1st core group (%lu cores from %lu)\n", - hweight64(core_mask), - hweight64(pfdev->features.shader_present)); - } gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present & core_mask); ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO, val, val == (pfdev->features.l2_present & core_mask), @@ -408,9 +418,27 @@ void panfrost_gpu_power_on(struct panfrost_device *pfdev) void panfrost_gpu_power_off(struct panfrost_device *pfdev) { - gpu_write(pfdev, TILER_PWROFF_LO, 0); - gpu_write(pfdev, SHADER_PWROFF_LO, 0); - gpu_write(pfdev, L2_PWROFF_LO, 0); + u64 core_mask = panfrost_get_core_mask(pfdev); + int ret; + u32 val; + + gpu_write(pfdev, SHADER_PWROFF_LO, pfdev->features.shader_present & core_mask); + ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_PWRTRANS_LO, + val, !val, 1, 1000); + if (ret) + dev_err(pfdev->dev, "shader power transition timeout"); + + gpu_write(pfdev, TILER_PWROFF_LO, pfdev->features.tiler_present); + ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_PWRTRANS_LO, + val, !val, 1, 1000); + if (ret) + dev_err(pfdev->dev, "tiler power transition timeout"); + + gpu_write(pfdev, L2_PWROFF_LO, pfdev->features.l2_present & core_mask); + ret = readl_poll_timeout(pfdev->iomem + L2_PWRTRANS_LO, + val, !val, 0, 1000); + if (ret) + dev_err(pfdev->dev, "l2 power transition timeout"); } int panfrost_gpu_init(struct panfrost_device *pfdev) |