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Commit 4fd07ac0 authored by Jesse Barnes's avatar Jesse Barnes Committed by Matthew Garrett
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IPS driver: apply BIOS provided CPU limit if different from default 



The BIOS may hand us a lower CPU power limit than the default for a
given SKU.  We should use it in case the platform isn't designed to
dissapate the full TDP of a given part.

Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
parent 070c0ee1

drivers/platform/x86/intel_ips.c

+4 −3
Original line number Diff line number Diff line
@@ -1391,9 +1391,10 @@ static struct ips_mcp_limits *ips_detect_cpu(struct ips_driver *ips) 
	tdp = turbo_power & TURBO_TDP_MASK;



	/* Sanity check TDP against CPU */

	if (limits->mcp_power_limit != (tdp / 8) * 1000) {

		dev_warn(&ips->dev->dev, "Warning: CPU TDP doesn't match expected value (found %d, expected %d)\n",

			 tdp / 8, limits->mcp_power_limit / 1000);

	if (limits->core_power_limit != (tdp / 8) * 1000) {

		dev_info(&ips->dev->dev, "CPU TDP doesn't match expected value (found %d, expected %d)\n",

			 tdp / 8, limits->core_power_limit / 1000);

		limits->core_power_limit = (tdp / 8) * 1000;

	}



out: