From 51a4726b04e880fdd9b4e0e58b13f70b0a68a7f5 Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 30 Sep 2015 16:45:52 -0400 Subject: [PATCH] drm/radeon: add pm sysfs files late They were added relatively early in the driver init process which meant that in some cases the driver was not finished initializing before external tools tried to use them which could result in a crash depending on the timing. Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/radeon_display.c | 14 +----- drivers/gpu/drm/radeon/radeon_pm.c | 63 +++++++++++++++---------- 2 files changed, 40 insertions(+), 37 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c index d2e9e9efc159..6743174acdbc 100644 --- a/drivers/gpu/drm/radeon/radeon_display.c +++ b/drivers/gpu/drm/radeon/radeon_display.c @@ -1633,18 +1633,8 @@ int radeon_modeset_init(struct radeon_device *rdev) radeon_fbdev_init(rdev); drm_kms_helper_poll_init(rdev->ddev); - if (rdev->pm.dpm_enabled) { - /* do dpm late init */ - ret = radeon_pm_late_init(rdev); - if (ret) { - rdev->pm.dpm_enabled = false; - DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n"); - } - /* set the dpm state for PX since there won't be - * a modeset to call this. - */ - radeon_pm_compute_clocks(rdev); - } + /* do pm late init */ + ret = radeon_pm_late_init(rdev); return 0; } diff --git a/drivers/gpu/drm/radeon/radeon_pm.c b/drivers/gpu/drm/radeon/radeon_pm.c index 05751f3f8444..44489cce7458 100644 --- a/drivers/gpu/drm/radeon/radeon_pm.c +++ b/drivers/gpu/drm/radeon/radeon_pm.c @@ -1326,14 +1326,6 @@ static int radeon_pm_init_old(struct radeon_device *rdev) INIT_DELAYED_WORK(&rdev->pm.dynpm_idle_work, radeon_dynpm_idle_work_handler); if (rdev->pm.num_power_states > 1) { - /* where's the best place to put these? */ - ret = device_create_file(rdev->dev, &dev_attr_power_profile); - if (ret) - DRM_ERROR("failed to create device file for power profile\n"); - ret = device_create_file(rdev->dev, &dev_attr_power_method); - if (ret) - DRM_ERROR("failed to create device file for power method\n"); - if (radeon_debugfs_pm_init(rdev)) { DRM_ERROR("Failed to register debugfs file for PM!\n"); } @@ -1391,20 +1383,6 @@ static int radeon_pm_init_dpm(struct radeon_device *rdev) goto dpm_failed; rdev->pm.dpm_enabled = true; - ret = device_create_file(rdev->dev, &dev_attr_power_dpm_state); - if (ret) - DRM_ERROR("failed to create device file for dpm state\n"); - ret = device_create_file(rdev->dev, &dev_attr_power_dpm_force_performance_level); - if (ret) - DRM_ERROR("failed to create device file for dpm state\n"); - /* XXX: these are noops for dpm but are here for backwards compat */ - ret = device_create_file(rdev->dev, &dev_attr_power_profile); - if (ret) - DRM_ERROR("failed to create device file for power profile\n"); - ret = device_create_file(rdev->dev, &dev_attr_power_method); - if (ret) - DRM_ERROR("failed to create device file for power method\n"); - if (radeon_debugfs_pm_init(rdev)) { DRM_ERROR("Failed to register debugfs file for dpm!\n"); } @@ -1545,9 +1523,44 @@ int radeon_pm_late_init(struct radeon_device *rdev) int ret = 0; if (rdev->pm.pm_method == PM_METHOD_DPM) { - mutex_lock(&rdev->pm.mutex); - ret = radeon_dpm_late_enable(rdev); - mutex_unlock(&rdev->pm.mutex); + if (rdev->pm.dpm_enabled) { + ret = device_create_file(rdev->dev, &dev_attr_power_dpm_state); + if (ret) + DRM_ERROR("failed to create device file for dpm state\n"); + ret = device_create_file(rdev->dev, &dev_attr_power_dpm_force_performance_level); + if (ret) + DRM_ERROR("failed to create device file for dpm state\n"); + /* XXX: these are noops for dpm but are here for backwards compat */ + ret = device_create_file(rdev->dev, &dev_attr_power_profile); + if (ret) + DRM_ERROR("failed to create device file for power profile\n"); + ret = device_create_file(rdev->dev, &dev_attr_power_method); + if (ret) + DRM_ERROR("failed to create device file for power method\n"); + + mutex_lock(&rdev->pm.mutex); + ret = radeon_dpm_late_enable(rdev); + mutex_unlock(&rdev->pm.mutex); + if (ret) { + rdev->pm.dpm_enabled = false; + DRM_ERROR("radeon_pm_late_init failed, disabling dpm\n"); + } else { + /* set the dpm state for PX since there won't be + * a modeset to call this. + */ + radeon_pm_compute_clocks(rdev); + } + } + } else { + if (rdev->pm.num_power_states > 1) { + /* where's the best place to put these? */ + ret = device_create_file(rdev->dev, &dev_attr_power_profile); + if (ret) + DRM_ERROR("failed to create device file for power profile\n"); + ret = device_create_file(rdev->dev, &dev_attr_power_method); + if (ret) + DRM_ERROR("failed to create device file for power method\n"); + } } return ret; }