From: Alex Deucher Date: Tue, 19 Jul 2022 17:15:40 +0000 (-0400) Subject: drm/amdgpu: move non-DC vblank handling out of irq code X-Git-Tag: v6.6.7~3824^2~17^2~76 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a347ca9720335028686b16302bd0d2075880b3d7;p=platform%2Fkernel%2Flinux-starfive.git drm/amdgpu: move non-DC vblank handling out of irq code Move it into the DCE code for each generation. This avoids confusion with the different display paths. v2: no need for a hotplug worker for vkms Acked-by: Christian König Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c index d2759d2..8513815 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -44,6 +44,41 @@ #include #include +/** + * amdgpu_display_hotplug_work_func - work handler for display hotplug event + * + * @work: work struct pointer + * + * This is the hotplug event work handler (all ASICs). + * The work gets scheduled from the IRQ handler if there + * was a hotplug interrupt. It walks through the connector table + * and calls hotplug handler for each connector. After this, it sends + * a DRM hotplug event to alert userspace. + * + * This design approach is required in order to defer hotplug event handling + * from the IRQ handler to a work handler because hotplug handler has to use + * mutexes which cannot be locked in an IRQ handler (since &mutex_lock may + * sleep). + */ +void amdgpu_display_hotplug_work_func(struct work_struct *work) +{ + struct amdgpu_device *adev = container_of(work, struct amdgpu_device, + hotplug_work); + struct drm_device *dev = adev_to_drm(adev); + struct drm_mode_config *mode_config = &dev->mode_config; + struct drm_connector *connector; + struct drm_connector_list_iter iter; + + mutex_lock(&mode_config->mutex); + drm_connector_list_iter_begin(dev, &iter); + drm_for_each_connector_iter(connector, &iter) + amdgpu_connector_hotplug(connector); + drm_connector_list_iter_end(&iter); + mutex_unlock(&mode_config->mutex); + /* Just fire off a uevent and let userspace tell us what to do */ + drm_helper_hpd_irq_event(dev); +} + static int amdgpu_display_framebuffer_init(struct drm_device *dev, struct amdgpu_framebuffer *rfb, const struct drm_mode_fb_cmd2 *mode_cmd, diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h index 560352f..9d19940 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h @@ -35,6 +35,7 @@ #define amdgpu_display_add_encoder(adev, e, s, c) (adev)->mode_info.funcs->add_encoder((adev), (e), (s), (c)) #define amdgpu_display_add_connector(adev, ci, sd, ct, ib, coi, h, r) (adev)->mode_info.funcs->add_connector((adev), (ci), (sd), (ct), (ib), (coi), (h), (r)) +void amdgpu_display_hotplug_work_func(struct work_struct *work); void amdgpu_display_update_priority(struct amdgpu_device *adev); uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev, uint64_t bo_flags); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c index 89011ba..a6aef48 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c @@ -101,41 +101,6 @@ const char *soc15_ih_clientid_name[] = { }; /** - * amdgpu_hotplug_work_func - work handler for display hotplug event - * - * @work: work struct pointer - * - * This is the hotplug event work handler (all ASICs). - * The work gets scheduled from the IRQ handler if there - * was a hotplug interrupt. It walks through the connector table - * and calls hotplug handler for each connector. After this, it sends - * a DRM hotplug event to alert userspace. - * - * This design approach is required in order to defer hotplug event handling - * from the IRQ handler to a work handler because hotplug handler has to use - * mutexes which cannot be locked in an IRQ handler (since &mutex_lock may - * sleep). - */ -static void amdgpu_hotplug_work_func(struct work_struct *work) -{ - struct amdgpu_device *adev = container_of(work, struct amdgpu_device, - hotplug_work); - struct drm_device *dev = adev_to_drm(adev); - struct drm_mode_config *mode_config = &dev->mode_config; - struct drm_connector *connector; - struct drm_connector_list_iter iter; - - mutex_lock(&mode_config->mutex); - drm_connector_list_iter_begin(dev, &iter); - drm_for_each_connector_iter(connector, &iter) - amdgpu_connector_hotplug(connector); - drm_connector_list_iter_end(&iter); - mutex_unlock(&mode_config->mutex); - /* Just fire off a uevent and let userspace tell us what to do */ - drm_helper_hpd_irq_event(dev); -} - -/** * amdgpu_irq_disable_all - disable *all* interrupts * * @adev: amdgpu device pointer @@ -317,21 +282,6 @@ int amdgpu_irq_init(struct amdgpu_device *adev) } } - if (!amdgpu_device_has_dc_support(adev)) { - if (!adev->enable_virtual_display) - /* Disable vblank IRQs aggressively for power-saving */ - /* XXX: can this be enabled for DC? */ - adev_to_drm(adev)->vblank_disable_immediate = true; - - r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); - if (r) - return r; - - /* Pre-DCE11 */ - INIT_WORK(&adev->hotplug_work, - amdgpu_hotplug_work_func); - } - INIT_WORK(&adev->irq.ih1_work, amdgpu_irq_handle_ih1); INIT_WORK(&adev->irq.ih2_work, amdgpu_irq_handle_ih2); INIT_WORK(&adev->irq.ih_soft_work, amdgpu_irq_handle_ih_soft); @@ -345,11 +295,8 @@ int amdgpu_irq_init(struct amdgpu_device *adev) /* PCI devices require shared interrupts. */ r = request_irq(irq, amdgpu_irq_handler, IRQF_SHARED, adev_to_drm(adev)->driver->name, adev_to_drm(adev)); - if (r) { - if (!amdgpu_device_has_dc_support(adev)) - flush_work(&adev->hotplug_work); + if (r) return r; - } adev->irq.installed = true; adev->irq.irq = irq; adev_to_drm(adev)->max_vblank_count = 0x00ffffff; @@ -366,9 +313,6 @@ void amdgpu_irq_fini_hw(struct amdgpu_device *adev) adev->irq.installed = false; if (adev->irq.msi_enabled) pci_free_irq_vectors(adev->pdev); - - if (!amdgpu_device_has_dc_support(adev)) - flush_work(&adev->hotplug_work); } amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft); diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c index 9b81b68..7cf99f7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vkms.c @@ -511,6 +511,10 @@ static int amdgpu_vkms_sw_init(void *handle) return r; } + r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); + if (r) + return r; + drm_kms_helper_poll_init(adev_to_drm(adev)); adev->mode_info.mode_config_initialized = true; diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c index 05051d5..a2452fc 100644 --- a/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v10_0.c @@ -2828,6 +2828,17 @@ static int dce_v10_0_sw_init(void *handle) if (r) return r; + /* Disable vblank IRQs aggressively for power-saving */ + /* XXX: can this be enabled for DC? */ + adev_to_drm(adev)->vblank_disable_immediate = true; + + r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); + if (r) + return r; + + INIT_WORK(&adev->hotplug_work, + amdgpu_display_hotplug_work_func); + drm_kms_helper_poll_init(adev_to_drm(adev)); adev->mode_info.mode_config_initialized = true; @@ -2890,6 +2901,8 @@ static int dce_v10_0_hw_fini(void *handle) dce_v10_0_pageflip_interrupt_fini(adev); + flush_work(&adev->hotplug_work); + return 0; } diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c index c928bc9..6ac680c 100644 --- a/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v11_0.c @@ -2947,6 +2947,17 @@ static int dce_v11_0_sw_init(void *handle) if (r) return r; + /* Disable vblank IRQs aggressively for power-saving */ + /* XXX: can this be enabled for DC? */ + adev_to_drm(adev)->vblank_disable_immediate = true; + + r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); + if (r) + return r; + + INIT_WORK(&adev->hotplug_work, + amdgpu_display_hotplug_work_func); + drm_kms_helper_poll_init(adev_to_drm(adev)); adev->mode_info.mode_config_initialized = true; @@ -3020,6 +3031,8 @@ static int dce_v11_0_hw_fini(void *handle) dce_v11_0_pageflip_interrupt_fini(adev); + flush_work(&adev->hotplug_work); + return 0; } diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c index 62315fd..354ae09 100644 --- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c @@ -2705,6 +2705,18 @@ static int dce_v6_0_sw_init(void *handle) if (r) return r; + /* Disable vblank IRQs aggressively for power-saving */ + /* XXX: can this be enabled for DC? */ + adev_to_drm(adev)->vblank_disable_immediate = true; + + r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); + if (r) + return r; + + /* Pre-DCE11 */ + INIT_WORK(&adev->hotplug_work, + amdgpu_display_hotplug_work_func); + drm_kms_helper_poll_init(adev_to_drm(adev)); return r; @@ -2763,6 +2775,8 @@ static int dce_v6_0_hw_fini(void *handle) dce_v6_0_pageflip_interrupt_fini(adev); + flush_work(&adev->hotplug_work); + return 0; } diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c index 87d5e4c..33977b0 100644 --- a/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/dce_v8_0.c @@ -2729,6 +2729,18 @@ static int dce_v8_0_sw_init(void *handle) if (r) return r; + /* Disable vblank IRQs aggressively for power-saving */ + /* XXX: can this be enabled for DC? */ + adev_to_drm(adev)->vblank_disable_immediate = true; + + r = drm_vblank_init(adev_to_drm(adev), adev->mode_info.num_crtc); + if (r) + return r; + + /* Pre-DCE11 */ + INIT_WORK(&adev->hotplug_work, + amdgpu_display_hotplug_work_func); + drm_kms_helper_poll_init(adev_to_drm(adev)); adev->mode_info.mode_config_initialized = true; @@ -2789,6 +2801,8 @@ static int dce_v8_0_hw_fini(void *handle) dce_v8_0_pageflip_interrupt_fini(adev); + flush_work(&adev->hotplug_work); + return 0; }