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| author | Hans de Goede <hdegoede@redhat.com> | 2022-09-06 23:38:52 +0300 |
|---|---|---|
| committer | Hans de Goede <hdegoede@redhat.com> | 2022-09-17 16:20:30 +0300 |
| commit | 9b6a16575ebf23a98a9ff84aedde9f3b25731714 (patch) | |
| tree | d387f32c3a01bfcdb1f3589d0cdb701f41f77fbe /drivers/gpu/drm/gma500/psb_drv.h | |
| parent | 2830ca9e5b98bee82f1d1e284ce23fe7fb244ea8 (diff) | |
| download | linux-9b6a16575ebf23a98a9ff84aedde9f3b25731714.tar.xz | |
drm/gma500: Fix (vblank) IRQs not working after suspend/resume
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@redhat.com>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220906203852.527663-4-hdegoede@redhat.com
(cherry picked from commit 235fdbc32d559db21e580f85035c59372704f09e)
Diffstat (limited to 'drivers/gpu/drm/gma500/psb_drv.h')
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_drv.h | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h index 0ea3d23575f3..731cc356c07a 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; |