From 2dc80b00652f2a08f3f1a01e668e3c7ad716f55f Mon Sep 17 00:00:00 2001 From: Shirish S Date: Thu, 25 May 2017 10:05:25 +0530 Subject: [PATCH] drm/amdgpu: optimize amdgpu driver load & resume time amdgpu_device_resume() & amdgpu_device_init() have a high time consuming call of amdgpu_late_init() which sets the clock_gating state of all IP blocks and is blocking. This patch defers only this setting of clock gating state operation to post resume of amdgpu driver but ideally before the UI comes up or in some cases post ui as well. With this change the resume time of amdgpu_device comes down from 1.299s to 0.199s which further helps in reducing the overall system resume time. V1: made the optimization applicable during driver load as well. TEST:(For ChromiumOS on STONEY only) * UI comes up * amdgpu_late_init() call gets called consistently and no errors reported. Signed-off-by: Shirish S Reviewed-by: Huang Rui Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 46 +++++++++++++++++----- 2 files changed, 39 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h index 359fb0ca8209..c01b8b62682b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1613,6 +1613,9 @@ struct amdgpu_device { /* amdkfd interface */ struct kfd_dev *kfd; + /* delayed work_func for deferring clockgating during resume */ + struct delayed_work late_init_work; + struct amdgpu_virt virt; /* link all shadow bo */ diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index a1d631ab8eb9..e731c4876a09 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -57,6 +57,8 @@ MODULE_FIRMWARE("amdgpu/vega10_gpu_info.bin"); MODULE_FIRMWARE("amdgpu/raven_gpu_info.bin"); +#define AMDGPU_RESUME_MS 2000 + static int amdgpu_debugfs_regs_init(struct amdgpu_device *adev); static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev); @@ -1669,22 +1671,13 @@ static bool amdgpu_check_vram_lost(struct amdgpu_device *adev) AMDGPU_RESET_MAGIC_NUM); } -static int amdgpu_late_init(struct amdgpu_device *adev) +static int amdgpu_late_set_cg_state(struct amdgpu_device *adev) { int i = 0, r; for (i = 0; i < adev->num_ip_blocks; i++) { if (!adev->ip_blocks[i].status.valid) continue; - if (adev->ip_blocks[i].version->funcs->late_init) { - r = adev->ip_blocks[i].version->funcs->late_init((void *)adev); - if (r) { - DRM_ERROR("late_init of IP block <%s> failed %d\n", - adev->ip_blocks[i].version->funcs->name, r); - return r; - } - adev->ip_blocks[i].status.late_initialized = true; - } /* skip CG for VCE/UVD, it's handled specially */ if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD && adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE) { @@ -1698,6 +1691,29 @@ static int amdgpu_late_init(struct amdgpu_device *adev) } } } + return 0; +} + +static int amdgpu_late_init(struct amdgpu_device *adev) +{ + int i = 0, r; + + for (i = 0; i < adev->num_ip_blocks; i++) { + if (!adev->ip_blocks[i].status.valid) + continue; + if (adev->ip_blocks[i].version->funcs->late_init) { + r = adev->ip_blocks[i].version->funcs->late_init((void *)adev); + if (r) { + DRM_ERROR("late_init of IP block <%s> failed %d\n", + adev->ip_blocks[i].version->funcs->name, r); + return r; + } + adev->ip_blocks[i].status.late_initialized = true; + } + } + + mod_delayed_work(system_wq, &adev->late_init_work, + msecs_to_jiffies(AMDGPU_RESUME_MS)); amdgpu_fill_reset_magic(adev); @@ -1791,6 +1807,13 @@ static int amdgpu_fini(struct amdgpu_device *adev) return 0; } +static void amdgpu_late_init_func_handler(struct work_struct *work) +{ + struct amdgpu_device *adev = + container_of(work, struct amdgpu_device, late_init_work.work); + amdgpu_late_set_cg_state(adev); +} + int amdgpu_suspend(struct amdgpu_device *adev) { int i, r; @@ -2050,6 +2073,8 @@ int amdgpu_device_init(struct amdgpu_device *adev, INIT_LIST_HEAD(&adev->gtt_list); spin_lock_init(&adev->gtt_list_lock); + INIT_DELAYED_WORK(&adev->late_init_work, amdgpu_late_init_func_handler); + if (adev->asic_type >= CHIP_BONAIRE) { adev->rmmio_base = pci_resource_start(adev->pdev, 5); adev->rmmio_size = pci_resource_len(adev->pdev, 5); @@ -2247,6 +2272,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev) amdgpu_fbdev_fini(adev); r = amdgpu_fini(adev); adev->accel_working = false; + cancel_delayed_work_sync(&adev->late_init_work); /* free i2c buses */ amdgpu_i2c_fini(adev); amdgpu_atombios_fini(adev); -- 2.20.1