[Intel-gfx] [PATCH 1/3] drm/i915: Make backlight setup debugs consistent

[Jani Nikula]

On Tue, 14 Feb 2023, Ville Syrjala <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> It's confusing to debug backlight issues when one can't
> easily even tell what kind of backlight control was
> selected. Sprinkle uniform debug messages to all the
> backlight setup functions.
>
> Also the one that was already there (ext_pwm) was
> using drm_info() for some reason. I don't think that's
> warranted so switch it to drm_dbg_kms() as well.

Maybe add similar in intel_dp_aux_backlight.c to the two setup functions
there? Also the message in intel_backlight_setup() could use some
tweaking.

> @@ -1392,6 +1408,10 @@ static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe
>  
>  	panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE;
>  
> +	drm_dbg_kms(&i915->drm,
> +		    "[CONNECTOR:%d:%s] Using native PWM for backlight control\n",
> +		    connector->base.base.id, connector->base.name);

Maybe log the pipe here similar to controller in bxt/cnp?

Otherwise, LGTM.


BR,
Jani.


-- 
Jani Nikula, Intel Open Source Graphics Center