Re: [PATCH resend 1/2] drm/i915: panel: Use intel_panel_compute_brightness() from pwm_setup_backlight()

[Hans de Goede <hdegoede@xxxxxxxxxx>]

Hi All,

On 2/21/20 6:29 PM, Hans de Goede wrote:
> Use intel_panel_compute_brightness() from pwm_setup_backlight() so that
> we correctly take i915_modparams.invert_brightness and/or
> QUIRK_INVERT_BRIGHTNESS into account when setting + getting the initial
> brightness value.
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>

ping? Any chance I can get a review from someone on this series?

Both patches are pretty trivial really...

Regards,

Hans



> ---
>   drivers/gpu/drm/i915/display/intel_panel.c | 18 +++++++++++-------
>   1 file changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
> index 7b3ec6eb3382..9ebee7d93414 100644
> --- a/drivers/gpu/drm/i915/display/intel_panel.c
> +++ b/drivers/gpu/drm/i915/display/intel_panel.c
> @@ -1843,6 +1843,7 @@ static int pwm_setup_backlight(struct intel_connector *connector,
>   	struct drm_i915_private *dev_priv = to_i915(dev);
>   	struct intel_panel *panel = &connector->panel;
>   	const char *desc;
> +	u32 level, ns;
>   	int retval;
>   
>   	/* Get the right PWM chip for DSI backlight according to VBT */
> @@ -1866,8 +1867,12 @@ static int pwm_setup_backlight(struct intel_connector *connector,
>   	 */
>   	pwm_apply_args(panel->backlight.pwm);
>   
> -	retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
> -			    CRC_PMIC_PWM_PERIOD_NS);
> +	panel->backlight.min = 0; /* 0% */
> +	panel->backlight.max = 100; /* 100% */
> +	level = intel_panel_compute_brightness(connector, 100);
> +	ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100);
> +
> +	retval = pwm_config(panel->backlight.pwm, ns, CRC_PMIC_PWM_PERIOD_NS);
>   	if (retval < 0) {
>   		DRM_ERROR("Failed to configure the pwm chip\n");
>   		pwm_put(panel->backlight.pwm);
> @@ -1875,11 +1880,10 @@ static int pwm_setup_backlight(struct intel_connector *connector,
>   		return retval;
>   	}
>   
> -	panel->backlight.min = 0; /* 0% */
> -	panel->backlight.max = 100; /* 100% */
> -	panel->backlight.level = DIV_ROUND_UP(
> -				 pwm_get_duty_cycle(panel->backlight.pwm) * 100,
> -				 CRC_PMIC_PWM_PERIOD_NS);
> +	level = DIV_ROUND_UP(pwm_get_duty_cycle(panel->backlight.pwm) * 100,
> +			     CRC_PMIC_PWM_PERIOD_NS);
> +	panel->backlight.level =
> +		intel_panel_compute_brightness(connector, level);
>   	panel->backlight.enabled = panel->backlight.level != 0;
>   
>   	DRM_INFO("Using %s PWM for LCD backlight control\n", desc);

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