From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthias Kaehlcke Date: Thu, 13 Jun 2019 19:43:25 +0000 Subject: [PATCH 3/4] backlight: pwm_bl: Set scale type for CIE 1931 curves Message-Id: <20190613194326.180889-4-mka@chromium.org> List-Id: References: <20190613194326.180889-1-mka@chromium.org> In-Reply-To: <20190613194326.180889-1-mka@chromium.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Thierry Reding , Lee Jones , Daniel Thompson , Jingoo Han , Bartlomiej Zolnierkiewicz Cc: linux-pwm@vger.kernel.org, linux-fbdev@vger.kernel.org, Brian Norris , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Douglas Anderson , Matthias Kaehlcke , Jacek Anaszewski , Pavel Machek , Enric Balletbo i Serra For backlight curves calculated with the CIE 1931 algorithm set the brightness scale type property accordingly. This makes the scale type available to userspace via the 'scale' sysfs attribute. Signed-off-by: Matthias Kaehlcke --- drivers/video/backlight/pwm_bl.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index fb45f866b923..f067fe7aa35d 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -553,6 +553,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) goto err_alloc; } + memset(&props, 0, sizeof(struct backlight_properties)); + if (data->levels) { /* * For the DT case, only when brightness levels is defined @@ -591,6 +593,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->levels = data->levels; } + + props.scale = BACKLIGHT_SCALE_CIE1931; } else { /* * That only happens for the non-DT case, where platform data @@ -601,7 +605,6 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->lth_brightness = data->lth_brightness * (state.period / pb->scale); - memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; props.max_brightness = data->max_brightness; bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, pb, -- 2.22.0.rc2.383.gf4fbbf30c2-goog