RE: [PATCH] platform/x86: thinkpad_acpi: Fix profile modes on Intel platforms

["Limonciello, Mario" <Mario.Limonciello@amd.com>]

[Public]



> -----Original Message-----
> From: Mark Pearson <mpearson-lenovo@squebb.ca>
> Sent: Tuesday, January 24, 2023 09:36
> To: mpearson-lenovo@squebb.ca
> Cc: hdegoede@redhat.com; markgross@kernel.org; Limonciello, Mario
> <Mario.Limonciello@amd.com>; platform-driver-x86@vger.kernel.org;
> stable@vger.kernel.org
> Subject: [PATCH] platform/x86: thinkpad_acpi: Fix profile modes on Intel
> platforms
> 
> My last commit to fix profile mode displays on AMD platforms caused
> an issue on Intel platforms - sorry!
> 
> In it I was reading the current functional mode (MMC, PSC, AMT) from
> the BIOS but didn't account for the fact that on some of our Intel
> platforms I use a different API which returns just the profile and not
> the functional mode.
> 
> This commit fixes it so that on Intel platforms it knows the functional
> mode is always MMC.
> 
> I also fixed a potential problem that a platform may try to set the mode
> for both MMC and PSC - which was incorrect.
> 
> Tested on X1 Carbon 9 (Intel) and Z13 (AMD).
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=216963
> Fixes: fde5f74ccfc7 ("platform/x86: thinkpad_acpi: Fix profile mode display in
> AMT mode")

In order for this to go to stable, it needs this tag in the commit message and not
just CC stable in the git send-email command.

(no need to respin for this reason, patchwork or b4 should pick it up when Hans grabs it)

Cc: stable@vger.kernel.org

> 
> Signed-off-by: Mark Pearson <mpearson-lenovo@squebb.ca>

Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>

> ---
>  drivers/platform/x86/thinkpad_acpi.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c
> b/drivers/platform/x86/thinkpad_acpi.c
> index a95946800ae9..6668d472df39 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -10496,8 +10496,7 @@ static int dytc_profile_set(struct
> platform_profile_handler *pprof,
>  			if (err)
>  				goto unlock;
>  		}
> -	}
> -	if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
> +	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
>  		err =
> dytc_command(DYTC_SET_COMMAND(DYTC_FUNCTION_PSC, perfmode,
> 1), &output);
>  		if (err)
>  			goto unlock;
> @@ -10525,14 +10524,16 @@ static void dytc_profile_refresh(void)
>  			err = dytc_command(DYTC_CMD_MMC_GET,
> &output);
>  		else
>  			err = dytc_cql_command(DYTC_CMD_GET, &output);
> -	} else if (dytc_capabilities & BIT(DYTC_FC_PSC))
> +		funcmode = DYTC_FUNCTION_MMC;
> +	} else if (dytc_capabilities & BIT(DYTC_FC_PSC)) {
>  		err = dytc_command(DYTC_CMD_GET, &output);
> -
> +		/*Check if we are PSC mode, or have AMT enabled */
> +		funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
> +	}
>  	mutex_unlock(&dytc_mutex);
>  	if (err)
>  		return;
> 
> -	funcmode = (output >> DYTC_GET_FUNCTION_BIT) & 0xF;
>  	perfmode = (output >> DYTC_GET_MODE_BIT) & 0xF;
>  	convert_dytc_to_profile(funcmode, perfmode, &profile);
>  	if (profile != dytc_current_profile) {
> --
> 2.38.1