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SubjectRe: [PATCH v4 3/3] drm/privacy_screen_x86: Add entry for ChromeOS privacy-screen
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Hi,

On 12/22/21 01:11, Rajat Jain wrote:
> Add a static entry in the x86 table, to detect and wait for
> privacy-screen on some ChromeOS platforms.
>
> Please note that this means that if CONFIG_CHROMEOS_PRIVACY_SCREEN is
> enabled, and if "GOOG0010" device is found in ACPI, then the i915 probe
> shall return EPROBE_DEFER until a platform driver actually registers the
> privacy-screen: https://hansdegoede.livejournal.com/25948.html
>
> Signed-off-by: Rajat Jain <rajatja@google.com>

Thanks, patch looks good to me:

Reviewed-by: Hans de Goede <hdegoede@redhat.com>

Regards,

Hans


> ---
> v4: * Simplify the detect_chromeos_privacy_screen() function
> * Don't change the existing print statement
> v3: * Remove the pr_info() from detect_chromeos_privacy_screen(), instead
> enhance the one already present in drm_privacy_screen_lookup_init()
> v2: * Use #if instead of #elif
> * Reorder the patches in the series.
> * Rebased on drm-tip
>
> drivers/gpu/drm/drm_privacy_screen_x86.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_privacy_screen_x86.c b/drivers/gpu/drm/drm_privacy_screen_x86.c
> index a2cafb294ca6..88802cd7a1ee 100644
> --- a/drivers/gpu/drm/drm_privacy_screen_x86.c
> +++ b/drivers/gpu/drm/drm_privacy_screen_x86.c
> @@ -47,6 +47,13 @@ static bool __init detect_thinkpad_privacy_screen(void)
> }
> #endif
>
> +#if IS_ENABLED(CONFIG_CHROMEOS_PRIVACY_SCREEN)
> +static bool __init detect_chromeos_privacy_screen(void)
> +{
> + return acpi_dev_present("GOOG0010", NULL, -1);
> +}
> +#endif
> +
> static const struct arch_init_data arch_init_data[] __initconst = {
> #if IS_ENABLED(CONFIG_THINKPAD_ACPI)
> {
> @@ -58,6 +65,16 @@ static const struct arch_init_data arch_init_data[] __initconst = {
> .detect = detect_thinkpad_privacy_screen,
> },
> #endif
> +#if IS_ENABLED(CONFIG_CHROMEOS_PRIVACY_SCREEN)
> + {
> + .lookup = {
> + .dev_id = NULL,
> + .con_id = NULL,
> + .provider = "privacy_screen-GOOG0010:00",
> + },
> + .detect = detect_chromeos_privacy_screen,
> + },
> +#endif
> };
>
> void __init drm_privacy_screen_lookup_init(void)
>

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