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| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2021-05-20 14:58:20 +0800 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-07-11 17:09:01 +0300 |
| commit | 8e55f99c510f38acb9b1b7552cb942eeb585795e (patch) | |
| tree | 83b48e032145d0f816037e22c286d7e59180c867 /drivers/gpu/drm/i915/display/intel_cursor.c | |
| parent | ca6374e267e2735fe382fe95de2a8a9c30c6bdb3 (diff) | |
drm/i915: Invoke another _DSM to enable MUX on HP Workstation laptops
On HP Fury G7 Workstations, graphics output is re-routed from Intel GFX
to discrete GFX after S3. This is not desirable, because userspace will
treat connected display as a new one, losing display settings.
The expected behavior is to let discrete GFX drives all external
displays.
The platform in question uses ACPI method \_SB.PCI0.HGME to enable MUX.
The method is inside the another _DSM, so add the _DSM and call it
accordingly.
I also tested some MUX-less and iGPU only laptops with that _DSM, no
regression was found.
v4:
- Rebase.
- Change the DSM name to avoid confusion.
- Move the function call to intel_opregion.
v3:
- Remove BXT from names.
- Change the parameter type.
- Fold the function into intel_modeset_init_hw().
v2:
- Forward declare struct pci_dev.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/3113
References: https://lore.kernel.org/intel-gfx/1460040732-31417-4-git-send-email-animesh.manna@intel.com/
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210520065832.614245-1-kai.heng.feng@canonical.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_cursor.c')
0 files changed, 0 insertions, 0 deletions