On Bay Trail devices either the Crystal Cove PMIC's pwm or the LPSS' pwm is used to control the backlight. Other drivers take core of providing a backlight_pwm alias through pwm_add_table, but it is still useful to know which pwm device actually ends up being used for debugging backlight issues, so add a DRM_INFO logging the pwm device-name.
Signed-off-by: Hans de Goede <[email protected]> --- drivers/gpu/drm/i915/intel_panel.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index cb50c527401f..7936a64af393 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -1670,6 +1670,9 @@ static int pwm_setup_backlight(struct intel_connector *connector, CRC_PMIC_PWM_PERIOD_NS); panel->backlight.enabled = panel->backlight.level != 0; + DRM_INFO("Using %s pwm-device for backlight control\n", + dev_name(panel->backlight.pwm->chip->dev)); + return 0; } -- 2.13.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
