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 <raja...@google.com> --- This patch is rebased on top of linux-next/master drivers/gpu/drm/drm_privacy_screen_x86.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_privacy_screen_x86.c b/drivers/gpu/drm/drm_privacy_screen_x86.c index a2cafb294ca6..3728870a98e7 100644 --- a/drivers/gpu/drm/drm_privacy_screen_x86.c +++ b/drivers/gpu/drm/drm_privacy_screen_x86.c @@ -45,6 +45,17 @@ static bool __init detect_thinkpad_privacy_screen(void) return (output & 0x10000) ? true : false; } +#elif IS_ENABLED(CONFIG_CHROMEOS_PRIVACY_SCREEN) + +static bool __init detect_chromeos_privacy_screen(void) +{ + if (!acpi_dev_present("GOOG0010", NULL, -1)) + return false; + + pr_info("%s: Need to wait for ChromeOS privacy-screen", __func__); + return true; + +} #endif static const struct arch_init_data arch_init_data[] __initconst = { @@ -57,6 +68,15 @@ static const struct arch_init_data arch_init_data[] __initconst = { }, .detect = detect_thinkpad_privacy_screen, }, +#elif IS_ENABLED(CONFIG_CHROMEOS_PRIVACY_SCREEN) + { + .lookup = { + .dev_id = NULL, + .con_id = NULL, + .provider = "privacy_screen-GOOG0010:00", + }, + .detect = detect_chromeos_privacy_screen, + }, #endif }; -- 2.34.1.173.g76aa8bc2d0-goog
