diff mbox series

[v2] platform/x86: thinkpad_acpi: not loading brightness_init when _BCL invalid

Message ID 20200702110740.19880-1-aaron.ma@canonical.com (mailing list archive)
State Superseded, archived
Headers show
Series [v2] platform/x86: thinkpad_acpi: not loading brightness_init when _BCL invalid | expand

Commit Message

Aaron Ma July 2, 2020, 11:07 a.m. UTC
When _BCL invalid, disable thinkpad_acpi backlight brightness control.

brightness_enable is already checked at the beginning.
Most new thinkpads are using GPU driver to control brightness now,
print notice when enabled brightness control even when brightness_enable = 1.

Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

Comments

Andy Shevchenko July 9, 2020, 6:31 p.m. UTC | #1
On Thu, Jul 2, 2020 at 2:07 PM Aaron Ma <aaron.ma@canonical.com> wrote:
>
> When _BCL invalid, disable thinkpad_acpi backlight brightness control.
>
> brightness_enable is already checked at the beginning.
> Most new thinkpads are using GPU driver to control brightness now,
> print notice when enabled brightness control even when brightness_enable = 1.


> +       } else if (!tp_features.bright_acpimode) {
> +               pr_notice("thinkpad_acpi backlight interface not available\n");
> +               return 1;
>         }
>
> +       pr_notice("thinkpad_acpi native brightness control enabled\n");

In both cases don't you see the duplication of module name in the messages?
diff mbox series

Patch

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index ff7f0a4f2475..a52d6d457d6c 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -6955,10 +6955,13 @@  static int __init brightness_init(struct ibm_init_struct *iibm)
 			pr_warn("Cannot enable backlight brightness support, ACPI is already handling it.  Refer to the acpi_backlight kernel parameter.\n");
 			return 1;
 		}
-	} else if (tp_features.bright_acpimode && brightness_enable > 1) {
-		pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n");
+	} else if (!tp_features.bright_acpimode) {
+		pr_notice("thinkpad_acpi backlight interface not available\n");
+		return 1;
 	}
 
+	pr_notice("thinkpad_acpi native brightness control enabled\n");
+
 	/*
 	 * Check for module parameter bogosity, note that we
 	 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be