From: Hans de Goede <hdegoede@xxxxxxxxxx> [ Upstream commit 235fdbc32d559db21e580f85035c59372704f09e ] Fix gnome-shell (and other page-flip users) hanging after suspend/resume because of the gma500's IRQs not working. This fixes 2 problems with the IRQ handling: 1. gma_power_off() calls gma_irq_uninstall() which does a free_irq(), but gma_power_on() called gma_irq_preinstall() + gma_irq_postinstall() which do not call request_irq. Replace the pre- + post-install calls with gma_irq_install() which does prep + request + post. 2. After fixing 1. IRQs still do not work on a Packard Bell Dot SC (Intel Atom N2600, cedarview) netbook. Cederview uses MSI interrupts and it seems that the BIOS re-configures things back to normal APIC based interrupts during S3 suspend. There is some MSI PCI-config registers save/restore code which tries to deal with this, but on the Packard Bell Dot SC this is not sufficient to restore MSI IRQ functionality after a suspend/resume. Replace the PCI-config registers save/restore with pci_disable_msi() on suspend + pci_enable_msi() on resume. Fixing e.g. gnome-shell hanging. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20220906203852.527663-4-hdegoede@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/gma500/cdv_device.c | 4 +--- drivers/gpu/drm/gma500/oaktrail_device.c | 5 +---- drivers/gpu/drm/gma500/power.c | 8 +------- drivers/gpu/drm/gma500/psb_drv.c | 2 +- drivers/gpu/drm/gma500/psb_drv.h | 5 +---- drivers/gpu/drm/gma500/psb_irq.c | 15 ++++++++++++--- drivers/gpu/drm/gma500/psb_irq.h | 2 +- 7 files changed, 18 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c index dd32b484dd82..ce96234f3df2 100644 --- a/drivers/gpu/drm/gma500/cdv_device.c +++ b/drivers/gpu/drm/gma500/cdv_device.c @@ -581,11 +581,9 @@ static const struct psb_offset cdv_regmap[2] = { static int cdv_chip_setup(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); - struct pci_dev *pdev = to_pci_dev(dev->dev); INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func); - if (pci_enable_msi(pdev)) - dev_warn(dev->dev, "Enabling MSI failed!\n"); + dev_priv->use_msi = true; dev_priv->regmap = cdv_regmap; gma_get_core_freq(dev); psb_intel_opregion_init(dev); diff --git a/drivers/gpu/drm/gma500/oaktrail_device.c b/drivers/gpu/drm/gma500/oaktrail_device.c index 5923a9c89312..f90e628cb482 100644 --- a/drivers/gpu/drm/gma500/oaktrail_device.c +++ b/drivers/gpu/drm/gma500/oaktrail_device.c @@ -501,12 +501,9 @@ static const struct psb_offset oaktrail_regmap[2] = { static int oaktrail_chip_setup(struct drm_device *dev) { struct drm_psb_private *dev_priv = to_drm_psb_private(dev); - struct pci_dev *pdev = to_pci_dev(dev->dev); int ret; - if (pci_enable_msi(pdev)) - dev_warn(dev->dev, "Enabling MSI failed!\n"); - + dev_priv->use_msi = true; dev_priv->regmap = oaktrail_regmap; ret = mid_chip_setup(dev); diff --git a/drivers/gpu/drm/gma500/power.c b/drivers/gpu/drm/gma500/power.c index b91de6d36e41..66873085d450 100644 --- a/drivers/gpu/drm/gma500/power.c +++ b/drivers/gpu/drm/gma500/power.c @@ -139,8 +139,6 @@ static void gma_suspend_pci(struct pci_dev *pdev) dev_priv->regs.saveBSM = bsm; pci_read_config_dword(pdev, 0xFC, &vbt); dev_priv->regs.saveVBT = vbt; - pci_read_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, &dev_priv->msi_addr); - pci_read_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, &dev_priv->msi_data); pci_disable_device(pdev); pci_set_power_state(pdev, PCI_D3hot); @@ -168,9 +166,6 @@ static bool gma_resume_pci(struct pci_dev *pdev) pci_restore_state(pdev); pci_write_config_dword(pdev, 0x5c, dev_priv->regs.saveBSM); pci_write_config_dword(pdev, 0xFC, dev_priv->regs.saveVBT); - /* restoring MSI address and data in PCIx space */ - pci_write_config_dword(pdev, PSB_PCIx_MSI_ADDR_LOC, dev_priv->msi_addr); - pci_write_config_dword(pdev, PSB_PCIx_MSI_DATA_LOC, dev_priv->msi_data); ret = pci_enable_device(pdev); if (ret != 0) @@ -223,8 +218,7 @@ int gma_power_resume(struct device *_dev) mutex_lock(&power_mutex); gma_resume_pci(pdev); gma_resume_display(pdev); - gma_irq_preinstall(dev); - gma_irq_postinstall(dev); + gma_irq_install(dev); mutex_unlock(&power_mutex); return 0; } diff --git a/drivers/gpu/drm/gma500/psb_drv.c b/drivers/gpu/drm/gma500/psb_drv.c index 1d8744f3e702..54e756b48606 100644 --- a/drivers/gpu/drm/gma500/psb_drv.c +++ b/drivers/gpu/drm/gma500/psb_drv.c @@ -383,7 +383,7 @@ static int psb_driver_load(struct drm_device *dev, unsigned long flags) PSB_WVDC32(0xFFFFFFFF, PSB_INT_MASK_R); spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags); - gma_irq_install(dev, pdev->irq); + gma_irq_install(dev); dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h index 0ddfec1a0851..4c3fc5eaf6ad 100644 --- a/drivers/gpu/drm/gma500/psb_drv.h +++ b/drivers/gpu/drm/gma500/psb_drv.h @@ -490,6 +490,7 @@ struct drm_psb_private { int rpm_enabled; /* MID specific */ + bool use_msi; bool has_gct; struct oaktrail_gct_data gct_data; @@ -499,10 +500,6 @@ struct drm_psb_private { /* Register state */ struct psb_save_area regs; - /* MSI reg save */ - uint32_t msi_addr; - uint32_t msi_data; - /* Hotplug handling */ struct work_struct hotplug_work; diff --git a/drivers/gpu/drm/gma500/psb_irq.c b/drivers/gpu/drm/gma500/psb_irq.c index e6e6d61bbeab..038f18ed0a95 100644 --- a/drivers/gpu/drm/gma500/psb_irq.c +++ b/drivers/gpu/drm/gma500/psb_irq.c @@ -316,17 +316,24 @@ void gma_irq_postinstall(struct drm_device *dev) spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags); } -int gma_irq_install(struct drm_device *dev, unsigned int irq) +int gma_irq_install(struct drm_device *dev) { + struct drm_psb_private *dev_priv = to_drm_psb_private(dev); + struct pci_dev *pdev = to_pci_dev(dev->dev); int ret; - if (irq == IRQ_NOTCONNECTED) + if (dev_priv->use_msi && pci_enable_msi(pdev)) { + dev_warn(dev->dev, "Enabling MSI failed!\n"); + dev_priv->use_msi = false; + } + + if (pdev->irq == IRQ_NOTCONNECTED) return -ENOTCONN; gma_irq_preinstall(dev); /* PCI devices require shared interrupts. */ - ret = request_irq(irq, gma_irq_handler, IRQF_SHARED, dev->driver->name, dev); + ret = request_irq(pdev->irq, gma_irq_handler, IRQF_SHARED, dev->driver->name, dev); if (ret) return ret; @@ -369,6 +376,8 @@ void gma_irq_uninstall(struct drm_device *dev) spin_unlock_irqrestore(&dev_priv->irqmask_lock, irqflags); free_irq(pdev->irq, dev); + if (dev_priv->use_msi) + pci_disable_msi(pdev); } int gma_crtc_enable_vblank(struct drm_crtc *crtc) diff --git a/drivers/gpu/drm/gma500/psb_irq.h b/drivers/gpu/drm/gma500/psb_irq.h index b51e395194ff..7648f69824a5 100644 --- a/drivers/gpu/drm/gma500/psb_irq.h +++ b/drivers/gpu/drm/gma500/psb_irq.h @@ -17,7 +17,7 @@ struct drm_device; void gma_irq_preinstall(struct drm_device *dev); void gma_irq_postinstall(struct drm_device *dev); -int gma_irq_install(struct drm_device *dev, unsigned int irq); +int gma_irq_install(struct drm_device *dev); void gma_irq_uninstall(struct drm_device *dev); int gma_crtc_enable_vblank(struct drm_crtc *crtc); -- 2.35.1
