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| author |   Mark Pearson <markpearson@lenovo.com> | 2022-06-27 14:14:49 -0400 |
|---|---|---|
| committer |   Hans de Goede <hdegoede@redhat.com> | 2022-06-28 22:19:04 +0200 |
| commit | 57a3487eefa598bdcc15df6dd3991b7ea843fb53 (patch) | |
| tree | 785b729165fc9f673171dddbb5f5fc84ee81867a /drivers/platform/x86/thinkpad_acpi.c | |
| parent | platform/x86: panasonic-laptop: Use acpi_video_get_backlight_type() (diff) | |
| download | linux-dev-57a3487eefa598bdcc15df6dd3991b7ea843fb53.tar.xz linux-dev-57a3487eefa598bdcc15df6dd3991b7ea843fb53.zip | |
platform/x86: thinkpad_acpi: do not use PSC mode on Intel platforms
PSC platform profile mode is only supported on Linux for AMD platforms.
Some older Intel platforms (e.g T490) are advertising it's capability
as Windows uses it - but on Linux we should only be using MMC profile
for Intel systems.
Add a check to prevent it being enabled incorrectly.
Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Link: https://lore.kernel.org/r/20220627181449.3537-1-markpearson@lenovo.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'drivers/platform/x86/thinkpad_acpi.c')
| -rw-r--r-- | drivers/platform/x86/thinkpad_acpi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 17d503e65a54..09047ca14b43 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -10565,6 +10565,11 @@ static int tpacpi_dytc_profile_init(struct ibm_init_struct *iibm) dytc_mmc_get_available = true; } } else if (dytc_capabilities & BIT(DYTC_FC_PSC)) { /* PSC MODE */ + /* Support for this only works on AMD platforms */ + if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) { + dbg_printk(TPACPI_DBG_INIT, "PSC not support on Intel platforms\n"); + return -ENODEV; + } pr_debug("PSC is supported\n"); } else { dbg_printk(TPACPI_DBG_INIT, "No DYTC support available\n"); |