Hi Am 25.10.23 um 13:36 schrieb Hogander, Jouni: [...]
+ + if (!drm_drv_uses_atomic_modeset(dev)) + drm_helper_disable_unused_functions(dev);Can you please explain why this is needed here?
This disables some parts of the mode-setting pipeline and is required for drivers with non-atomic commits. AFAICT atomic mode setting is not supported on some very old Intel chips. [1] I'll leave a short comment on the code.
[1] https://elixir.bootlin.com/linux/v6.6/source/drivers/gpu/drm/i915/intel_device_info.c#L399
Best regard Thomas
+ + ret = drm_fb_helper_initial_config(fb_helper); + if (ret) + goto err_drm_fb_helper_fini; + + vga_switcheroo_client_fb_set(pdev, fb_helper->info);return 0;+ +err_drm_fb_helper_fini: + drm_fb_helper_fini(fb_helper); +err_drm_err: + drm_err(dev, "Failed to setup i915 fbdev emulation (ret=%d)\n", ret); + return ret; }static const struct drm_client_funcs intel_fbdev_client_funcs = {@@ -703,22 +729,23 @@ static const struct drm_client_funcs intel_fbdev_client_funcs = { .hotplug = intel_fbdev_client_hotplug, };-int intel_fbdev_init(struct drm_device *dev)+void intel_fbdev_setup(struct drm_i915_private *dev_priv)Use i915 rather than dev_priv. BR, Jouni Högander{ - struct drm_i915_private *dev_priv = to_i915(dev); + struct drm_device *dev = &dev_priv->drm; struct intel_fbdev *ifbdev; int ret;- if (drm_WARN_ON(dev, !HAS_DISPLAY(dev_priv)))- return -ENODEV; + if (!HAS_DISPLAY(dev_priv)) + return;ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);if (!ifbdev) - return -ENOMEM; - - mutex_init(&ifbdev->hpd_lock); + return; drm_fb_helper_prepare(dev, &ifbdev->helper, 32, &intel_fb_helper_funcs);+ dev_priv->display.fbdev.fbdev = ifbdev;+ INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); + mutex_init(&ifbdev->hpd_lock); if (intel_fbdev_init_bios(dev, ifbdev)) ifbdev->helper.preferred_bpp = ifbdev->preferred_bpp; else @@ -726,68 +753,19 @@ int intel_fbdev_init(struct drm_device *dev)ret = drm_client_init(dev, &ifbdev->helper.client, "i915-fbdev", &intel_fbdev_client_funcs); - if (ret) + if (ret) { + drm_err(dev, "Failed to register client: %d\n", ret); goto err_drm_fb_helper_unprepare; + }- ret = drm_fb_helper_init(dev, &ifbdev->helper);- if (ret) - goto err_drm_client_release; - - dev_priv->display.fbdev.fbdev = ifbdev; - INIT_WORK(&dev_priv->display.fbdev.suspend_work, intel_fbdev_suspend_worker); + drm_client_register(&ifbdev->helper.client);- return 0;+ return;-err_drm_client_release:- drm_client_release(&ifbdev->helper.client); err_drm_fb_helper_unprepare: drm_fb_helper_unprepare(&ifbdev->helper); + mutex_destroy(&ifbdev->hpd_lock); kfree(ifbdev); - return ret; -} - -static void intel_fbdev_initial_config(void *data, async_cookie_t cookie) -{ - struct intel_fbdev *ifbdev = data; - - /* Due to peculiar init order wrt to hpd handling this is separate. */ - if (drm_fb_helper_initial_config(&ifbdev->helper)) - intel_fbdev_unregister(to_i915(ifbdev->helper.dev)); -} - -void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv) -{ - struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; - - if (!ifbdev) - return; - - ifbdev->cookie = async_schedule(intel_fbdev_initial_config, ifbdev); -} - -void intel_fbdev_unregister(struct drm_i915_private *dev_priv) -{ - struct intel_fbdev *ifbdev = dev_priv->display.fbdev.fbdev; - - if (!ifbdev) - return; - - intel_fbdev_set_suspend(&dev_priv->drm, FBINFO_STATE_SUSPENDED, true); - - if (!current_is_async()) - intel_fbdev_sync(ifbdev); - - drm_fb_helper_unregister_info(&ifbdev->helper); -} - -void intel_fbdev_fini(struct drm_i915_private *dev_priv) -{ - struct intel_fbdev *ifbdev = fetch_and_zero(&dev_priv-display.fbdev.fbdev);- - if (!ifbdev) - return; - - intel_fbdev_destroy(ifbdev); }struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev*fbdev) diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.h b/drivers/gpu/drm/i915/display/intel_fbdev.h index 8c953f102ba22..08de2d5b34338 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.h +++ b/drivers/gpu/drm/i915/display/intel_fbdev.h @@ -14,27 +14,11 @@ struct intel_fbdev; struct intel_framebuffer;#ifdef CONFIG_DRM_FBDEV_EMULATION-int intel_fbdev_init(struct drm_device *dev); -void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv); -void intel_fbdev_unregister(struct drm_i915_private *dev_priv); -void intel_fbdev_fini(struct drm_i915_private *dev_priv); +void intel_fbdev_setup(struct drm_i915_private *dev_priv); void intel_fbdev_set_suspend(struct drm_device *dev, int state, bool synchronous); struct intel_framebuffer *intel_fbdev_framebuffer(struct intel_fbdev *fbdev); #else -static inline int intel_fbdev_init(struct drm_device *dev) -{ - return 0; -} - -static inline void intel_fbdev_initial_config_async(struct drm_i915_private *dev_priv) -{ -} - -static inline void intel_fbdev_unregister(struct drm_i915_private *dev_priv) -{ -} - -static inline void intel_fbdev_fini(struct drm_i915_private *dev_priv) +static inline void intel_fbdev_setup(struct drm_i915_private *dev_priv) { }diff --git a/drivers/gpu/drm/i915/i915_driver.cb/drivers/gpu/drm/i915/i915_driver.c index 86460cd8167d1..53663c0cc3be4 100644 --- a/drivers/gpu/drm/i915/i915_driver.c +++ b/drivers/gpu/drm/i915/i915_driver.c @@ -817,6 +817,8 @@ int i915_driver_probe(struct pci_dev *pdev, const struct pci_device_id *ent)i915->do_release = true; + intel_fbdev_setup(i915);+ return 0;out_cleanup_gem:
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)
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