From: Jonathan Cameron <jonathan.cameron@huawei.com>
To: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Linux ACPI <linux-acpi@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
Bjorn Helgaas <helgaas@kernel.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
Hans de Goede <hansg@kernel.org>,
Mario Limonciello <mario.limonciello@amd.com>
Subject: Re: [PATCH v2.1 6/8] ACPI: bus: Rework the handling of \_SB._OSC platform features
Date: Tue, 23 Dec 2025 11:25:07 +0000 [thread overview]
Message-ID: <20251223112507.0000250d@huawei.com> (raw)
In-Reply-To: <1966378.CQOukoFCf9@rafael.j.wysocki>
On Mon, 22 Dec 2025 20:21:19 +0100
"Rafael J. Wysocki" <rafael@kernel.org> wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> Both acpi_bus_osc_negotiate_platform_control() and
> acpi_bus_osc_negotiate_usb_control() first call acpi_run_osc() to
> evaluate _OSC in "query mode", with OSC_QUERY_ENABLE set in the
> capabilities buffer, and then use the resultant feature mask as
> the input buffer for requesting control of those features by
> calling acpi_run_osc() to evaluate _OSC with OSC_QUERY_ENABLE clear.
>
> This involves some code duplication and unnecessary memory
> allocations, so introduce a new helper function carrying out an
> _OSC handshake along the lines of the above description in a simpler
> way and update acpi_bus_osc_negotiate_platform_control() to use it.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
next prev parent reply other threads:[~2025-12-23 11:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-22 18:58 [PATCH v2.1 0/8] ACPI: bus: Rework of the \_SB._OSC handling Rafael J. Wysocki
2025-12-22 19:05 ` [PATCH v2.1 1/8] ACPI: bus: Fix handling of _OSC errors in acpi_run_osc() Rafael J. Wysocki
2025-12-23 11:12 ` Jonathan Cameron
2025-12-23 16:13 ` Rafael J. Wysocki
2025-12-22 19:11 ` [PATCH v2.1 2/8] ACPI: bus: Rework printing debug messages on _OSC errors Rafael J. Wysocki
2025-12-23 11:13 ` Jonathan Cameron
2025-12-22 19:14 ` [PATCH v2.1 3/8] ACPI: bus: Split _OSC evaluation out of acpi_run_osc() Rafael J. Wysocki
2025-12-23 11:18 ` Jonathan Cameron
2025-12-22 19:17 ` [PATCH v2.1 4/8] ACPI: bus: Split _OSC error processing " Rafael J. Wysocki
2025-12-22 19:18 ` [PATCH v2.1 5/8] ACPI: bus: Rename label and use ACPI_FREE() in acpi_run_osc() Rafael J. Wysocki
2025-12-22 19:21 ` [PATCH v2.1 6/8] ACPI: bus: Rework the handling of \_SB._OSC platform features Rafael J. Wysocki
2025-12-23 11:25 ` Jonathan Cameron [this message]
2025-12-22 19:23 ` [PATCH v2.1 7/8] ACPI: bus: Adjust feature mask creation for \_SB._OSC Rafael J. Wysocki
2025-12-23 11:26 ` Jonathan Cameron
2025-12-22 19:26 ` [PATCH v2.1 8/8] ACPI: bus: Rework the handling of \_SB._OSC USB4 features Rafael J. Wysocki
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