Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E36B73BF67B; Mon, 23 Mar 2026 16:28:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774283308; cv=none; b=Mw6aUwwGuCXX3k9SIxGIyZThq074a7d0LiDJE+H2HwMFlOkQI97rGQ9Nxlm1UQo+8mkEZP2+kCzDIjukCe7p2iMJWGLHbjHP15ANNGxflErNkg5TCN7JgAquPVaFacsM9VamJ6ioGIlCVGVwCimFTtZXN/XVGZoMxiN49+pQmW0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774283308; c=relaxed/simple; bh=x4GIOloxbHACPRtiGA2MF6KFY9eB071wckxhG0bpx4s=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=d7B9E1yYpKDZawNa+o09ttCka5+s6oOLhM90jISkeuEQYRGmcAbghdESCA0xD6GzE0WxYvOS/50bIasqeJUZ/idGGdgwS4RBKdI2YXLj+AQBCuClmQpN75gCw953vDXhI/iR1o6W/uvPgpc4BGsejXFqiqUeJcbc+8VKDOm+3j4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=iZFuFldI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="iZFuFldI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1085AC4CEF7; Mon, 23 Mar 2026 16:28:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774283307; bh=x4GIOloxbHACPRtiGA2MF6KFY9eB071wckxhG0bpx4s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iZFuFldI04vGNx3AOTsgQDmtlc2A5RJmtDvSTXVuVtNet+rU7MdMFVBz09cuNyUY/ +Drgy9cMPadW3t7vLClmgPQU5bJMjqUcTKWcsqgNiCmNhX5orKQAfPA7S65eENUQwf 1JzLPvJBL6YEm/dkMXZ/QfbI5u2/mMHYSVBF0do4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?Christian=20K=C3=B6nig?= , Alex Deucher , Rosen Penev Subject: [PATCH 6.1 460/481] drm/amdgpu: clarify DC checks Date: Mon, 23 Mar 2026 14:47:22 +0100 Message-ID: <20260323134536.428244473@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260323134525.256603107@linuxfoundation.org> References: <20260323134525.256603107@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher [ Upstream commit d09ef243035b75a6d403ebfeb7e87fa20d7e25c6 ] There are several places where we don't want to check if a particular asic could support DC, but rather, if DC is enabled. Set a flag if DC is enabled and check for that rather than if a device supports DC or not. Acked-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Rosen Penev Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 2 - drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 - drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 32 +++++++++++----------- drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 4 +- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 - drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c | 2 - 8 files changed, 25 insertions(+), 21 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h @@ -1071,6 +1071,7 @@ struct amdgpu_device { struct work_struct reset_work; bool job_hang; + bool dc_enabled; }; static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c @@ -857,7 +857,7 @@ int amdgpu_acpi_init(struct amdgpu_devic struct amdgpu_atif *atif = &amdgpu_acpi_priv.atif; if (atif->notifications.brightness_change) { - if (amdgpu_device_has_dc_support(adev)) { + if (adev->dc_enabled) { #if defined(CONFIG_DRM_AMD_DC) struct amdgpu_display_manager *dm = &adev->dm; --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1981,7 +1981,7 @@ int amdgpu_debugfs_init(struct amdgpu_de amdgpu_ta_if_debugfs_init(adev); #if defined(CONFIG_DRM_AMD_DC) - if (amdgpu_device_has_dc_support(adev)) + if (adev->dc_enabled) dtn_debugfs_init(adev); #endif --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -4404,25 +4404,27 @@ int amdgpu_device_resume(struct drm_devi amdgpu_ras_resume(adev); - /* - * Most of the connector probing functions try to acquire runtime pm - * refs to ensure that the GPU is powered on when connector polling is - * performed. Since we're calling this from a runtime PM callback, - * trying to acquire rpm refs will cause us to deadlock. - * - * Since we're guaranteed to be holding the rpm lock, it's safe to - * temporarily disable the rpm helpers so this doesn't deadlock us. - */ + if (adev->mode_info.num_crtc) { + /* + * Most of the connector probing functions try to acquire runtime pm + * refs to ensure that the GPU is powered on when connector polling is + * performed. Since we're calling this from a runtime PM callback, + * trying to acquire rpm refs will cause us to deadlock. + * + * Since we're guaranteed to be holding the rpm lock, it's safe to + * temporarily disable the rpm helpers so this doesn't deadlock us. + */ #ifdef CONFIG_PM - dev->dev->power.disable_depth++; + dev->dev->power.disable_depth++; #endif - if (!amdgpu_device_has_dc_support(adev)) - drm_helper_hpd_irq_event(dev); - else - drm_kms_helper_hotplug_event(dev); + if (!adev->dc_enabled) + drm_helper_hpd_irq_event(dev); + else + drm_kms_helper_hotplug_event(dev); #ifdef CONFIG_PM - dev->dev->power.disable_depth--; + dev->dev->power.disable_depth--; #endif + } adev->in_suspend = false; if (adev->enable_mes) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -534,7 +534,7 @@ uint32_t amdgpu_display_supported_domain */ if ((bo_flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) && amdgpu_bo_support_uswc(bo_flags) && - amdgpu_device_has_dc_support(adev) && + adev->dc_enabled && adev->mode_info.gpu_vm_support) domain |= AMDGPU_GEM_DOMAIN_GTT; #endif @@ -1330,7 +1330,7 @@ int amdgpu_display_modeset_create_props( "dither", amdgpu_dither_enum_list, sz); - if (amdgpu_device_has_dc_support(adev)) { + if (adev->dc_enabled) { adev->mode_info.abm_level_property = drm_property_create_range(adev_to_drm(adev), 0, "abm level", 0, 4); --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -2530,7 +2530,7 @@ static int amdgpu_runtime_idle_check_dis if (ret) return ret; - if (amdgpu_device_has_dc_support(adev)) { + if (adev->dc_enabled) { struct drm_crtc *crtc; drm_for_each_crtc(crtc, drm_dev) { --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -4842,6 +4842,7 @@ static int dm_early_init(void *handle) adev_to_drm(adev)->dev, &dev_attr_s3_debug); #endif + adev->dc_enabled = true; return 0; } --- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c @@ -1567,7 +1567,7 @@ static void pp_pm_compute_clocks(void *h struct pp_hwmgr *hwmgr = handle; struct amdgpu_device *adev = hwmgr->adev; - if (!amdgpu_device_has_dc_support(adev)) { + if (!adev->dc_enabled) { amdgpu_dpm_get_active_displays(adev); adev->pm.pm_display_cfg.num_display = adev->pm.dpm.new_active_crtc_count; adev->pm.pm_display_cfg.vrefresh = amdgpu_dpm_get_vrefresh(adev);