On Tue, Jul 7, 2020 at 9:59 PM Sam Ravnborg <sam@xxxxxxxxxxxx> wrote:
>
> On Tue, Jul 07, 2020 at 07:48:20AM +0200, Daniel Vetter wrote:
> > On Fri, Jul 03, 2020 at 08:45:43PM +0200, Sam Ravnborg wrote:
> > > Introduce the backlight_get_brightness() helper in all
> > > video/backlight/* drivers.
> > > This simplifies the code and align the implementation of the
> > > update_status() operation across the different backlight drivers.
> > >
> > > Some of the drivers gains a little extra functionality by the change
> > > as they now respect the fb_blank() ioctl.
> > >
> > > Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> >
> > This looks really nice!
> >
> > Since there's a pile more backlight drivers all over the tree, care to
> > update the gpu/todo.rst entry with a note that conversions should use
> > backlight_get_brightness?
>
> When I stop doing backlight stuff I will compose a proper
> todo entry. Right now I hope to get first batch included in upstream.
Sounds all good to me.
> I hope this set can hit upstream.
> Next it to convert backlight stuff in gpu/drm/ - let me see how that
> all turns out. One idea is to support embedding struct backlight_device,
> but I am not sure if this really will fly.
Embedding means you tie the lifetime of the backlight device to the
lifetime of whatever structure it's embedded in. This might be a
complete pain, but it might also work out since backlight
register/unregistering is fairly simple. But I'd be vary, maybe before
we do that we'll need stuff like device_link between backlight and
drm_device (to make sure the drm_device never outlives the backlight
at a device level), and maybe a few other tricks.
Does sound like a lot of head-scratcher fun though to work through all this :-)
Cheers, Daniel
>
> Sam
>
> > -Daniel
> >
> > > ---
> > > drivers/video/backlight/88pm860x_bl.c | 13 +------------
> > > drivers/video/backlight/adp5520_bl.c | 10 +---------
> > > drivers/video/backlight/adp8860_bl.c | 10 +---------
> > > drivers/video/backlight/adp8870_bl.c | 10 +---------
> > > drivers/video/backlight/bd6107.c | 7 +------
> > > drivers/video/backlight/corgi_lcd.c | 8 +-------
> > > drivers/video/backlight/da903x_bl.c | 13 +------------
> > > drivers/video/backlight/ep93xx_bl.c | 8 +-------
> > > drivers/video/backlight/hp680_bl.c | 6 +-----
> > > drivers/video/backlight/kb3886_bl.c | 6 +-----
> > > drivers/video/backlight/led_bl.c | 7 +------
> > > drivers/video/backlight/lm3533_bl.c | 8 +-------
> > > drivers/video/backlight/locomolcd.c | 6 +-----
> > > drivers/video/backlight/lv5207lp.c | 7 +------
> > > drivers/video/backlight/max8925_bl.c | 13 +------------
> > > drivers/video/backlight/pwm_bl.c | 7 +------
> > > drivers/video/backlight/qcom-wled.c | 7 +------
> > > drivers/video/backlight/tps65217_bl.c | 10 +---------
> > > drivers/video/backlight/wm831x_bl.c | 13 +------------
> > > 19 files changed, 19 insertions(+), 150 deletions(-)
> > >
> > > diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c
> > > index 20d96a5ac384..25e409bbb1a2 100644
> > > --- a/drivers/video/backlight/88pm860x_bl.c
> > > +++ b/drivers/video/backlight/88pm860x_bl.c
> > > @@ -121,18 +121,7 @@ static int pm860x_backlight_set(struct backlight_device *bl, int brightness)
> > >
> > > static int pm860x_backlight_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.state & BL_CORE_SUSPENDED)
> > > - brightness = 0;
> > > -
> > > - return pm860x_backlight_set(bl, brightness);
> > > + return pm860x_backlight_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int pm860x_backlight_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
> > > index 0f63f76723a5..686988c3df3a 100644
> > > --- a/drivers/video/backlight/adp5520_bl.c
> > > +++ b/drivers/video/backlight/adp5520_bl.c
> > > @@ -65,15 +65,7 @@ static int adp5520_bl_set(struct backlight_device *bl, int brightness)
> > >
> > > static int adp5520_bl_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - return adp5520_bl_set(bl, brightness);
> > > + return adp5520_bl_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int adp5520_bl_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
> > > index 19968104fc47..ddc7f5f0401f 100644
> > > --- a/drivers/video/backlight/adp8860_bl.c
> > > +++ b/drivers/video/backlight/adp8860_bl.c
> > > @@ -361,15 +361,7 @@ static int adp8860_bl_set(struct backlight_device *bl, int brightness)
> > >
> > > static int adp8860_bl_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - return adp8860_bl_set(bl, brightness);
> > > + return adp8860_bl_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int adp8860_bl_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
> > > index 4c0032010cfe..8b5213a39527 100644
> > > --- a/drivers/video/backlight/adp8870_bl.c
> > > +++ b/drivers/video/backlight/adp8870_bl.c
> > > @@ -399,15 +399,7 @@ static int adp8870_bl_set(struct backlight_device *bl, int brightness)
> > >
> > > static int adp8870_bl_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - return adp8870_bl_set(bl, brightness);
> > > + return adp8870_bl_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int adp8870_bl_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c
> > > index d5d5fb457e78..515184fbe33a 100644
> > > --- a/drivers/video/backlight/bd6107.c
> > > +++ b/drivers/video/backlight/bd6107.c
> > > @@ -82,12 +82,7 @@ static int bd6107_write(struct bd6107 *bd, u8 reg, u8 data)
> > > static int bd6107_backlight_update_status(struct backlight_device *backlight)
> > > {
> > > struct bd6107 *bd = bl_get_data(backlight);
> > > - int brightness = backlight->props.brightness;
> > > -
> > > - if (backlight->props.power != FB_BLANK_UNBLANK ||
> > > - backlight->props.fb_blank != FB_BLANK_UNBLANK ||
> > > - backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
> > > - brightness = 0;
> > > + int brightness = backlight_get_brightness(backlight);
> > >
> > > if (brightness) {
> > > bd6107_write(bd, BD6107_PORTSEL, BD6107_PORTSEL_LEDM(2) |
> > > diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c
> > > index 25ef0cbd7583..33f5d80495e6 100644
> > > --- a/drivers/video/backlight/corgi_lcd.c
> > > +++ b/drivers/video/backlight/corgi_lcd.c
> > > @@ -420,13 +420,7 @@ static int corgi_bl_set_intensity(struct corgi_lcd *lcd, int intensity)
> > > static int corgi_bl_update_status(struct backlight_device *bd)
> > > {
> > > struct corgi_lcd *lcd = bl_get_data(bd);
> > > - int intensity = bd->props.brightness;
> > > -
> > > - if (bd->props.power != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > -
> > > - if (bd->props.fb_blank != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > + int intensity = backlight_get_brightness(bd);
> > >
> > > if (corgibl_flags & CORGIBL_SUSPENDED)
> > > intensity = 0;
> > > diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c
> > > index 62540e4bdedb..71f21bbc7a9f 100644
> > > --- a/drivers/video/backlight/da903x_bl.c
> > > +++ b/drivers/video/backlight/da903x_bl.c
> > > @@ -77,18 +77,7 @@ static int da903x_backlight_set(struct backlight_device *bl, int brightness)
> > >
> > > static int da903x_backlight_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.state & BL_CORE_SUSPENDED)
> > > - brightness = 0;
> > > -
> > > - return da903x_backlight_set(bl, brightness);
> > > + return da903x_backlight_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int da903x_backlight_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c
> > > index 4149e0b2f83c..2387009d452d 100644
> > > --- a/drivers/video/backlight/ep93xx_bl.c
> > > +++ b/drivers/video/backlight/ep93xx_bl.c
> > > @@ -36,13 +36,7 @@ static int ep93xxbl_set(struct backlight_device *bl, int brightness)
> > >
> > > static int ep93xxbl_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK ||
> > > - bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - return ep93xxbl_set(bl, brightness);
> > > + return ep93xxbl_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int ep93xxbl_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c
> > > index 8ea42b8d9bc8..9123c33def05 100644
> > > --- a/drivers/video/backlight/hp680_bl.c
> > > +++ b/drivers/video/backlight/hp680_bl.c
> > > @@ -33,12 +33,8 @@ static void hp680bl_send_intensity(struct backlight_device *bd)
> > > {
> > > unsigned long flags;
> > > u16 v;
> > > - int intensity = bd->props.brightness;
> > > + int intensity = backlight_get_brightness(bd);
> > >
> > > - if (bd->props.power != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > - if (bd->props.fb_blank != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > if (hp680bl_suspended)
> > > intensity = 0;
> > >
> > > diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c
> > > index 1dfe13c18925..55794b239cff 100644
> > > --- a/drivers/video/backlight/kb3886_bl.c
> > > +++ b/drivers/video/backlight/kb3886_bl.c
> > > @@ -87,12 +87,8 @@ static const struct dmi_system_id kb3886bl_device_table[] __initconst = {
> > >
> > > static int kb3886bl_send_intensity(struct backlight_device *bd)
> > > {
> > > - int intensity = bd->props.brightness;
> > > + int intensity = backlight_get_brightness(bd);
> > >
> > > - if (bd->props.power != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > - if (bd->props.fb_blank != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > if (kb3886bl_flags & KB3886BL_SUSPENDED)
> > > intensity = 0;
> > >
> > > diff --git a/drivers/video/backlight/led_bl.c b/drivers/video/backlight/led_bl.c
> > > index 3f66549997c8..f54d256e2d54 100644
> > > --- a/drivers/video/backlight/led_bl.c
> > > +++ b/drivers/video/backlight/led_bl.c
> > > @@ -54,12 +54,7 @@ static void led_bl_power_off(struct led_bl_data *priv)
> > > static int led_bl_update_status(struct backlight_device *bl)
> > > {
> > > struct led_bl_data *priv = bl_get_data(bl);
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK ||
> > > - bl->props.fb_blank != FB_BLANK_UNBLANK ||
> > > - bl->props.state & BL_CORE_FBBLANK)
> > > - brightness = 0;
> > > + int brightness = backlight_get_brightness(bl);
> > >
> > > if (brightness > 0)
> > > led_bl_set_brightness(priv, brightness);
> > > diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> > > index ee09d1bd02b9..d07a2bd805fc 100644
> > > --- a/drivers/video/backlight/lm3533_bl.c
> > > +++ b/drivers/video/backlight/lm3533_bl.c
> > > @@ -39,14 +39,8 @@ static inline int lm3533_bl_get_ctrlbank_id(struct lm3533_bl *bl)
> > > static int lm3533_bl_update_status(struct backlight_device *bd)
> > > {
> > > struct lm3533_bl *bl = bl_get_data(bd);
> > > - int brightness = bd->props.brightness;
> > >
> > > - if (bd->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > - if (bd->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - return lm3533_ctrlbank_set_brightness(&bl->cb, (u8)brightness);
> > > + return lm3533_ctrlbank_set_brightness(&bl->cb, backlight_get_brightness(bd));
> > > }
> > >
> > > static int lm3533_bl_get_brightness(struct backlight_device *bd)
> > > diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c
> > > index cdc02e04f89d..297ee2e1ab0b 100644
> > > --- a/drivers/video/backlight/locomolcd.c
> > > +++ b/drivers/video/backlight/locomolcd.c
> > > @@ -111,12 +111,8 @@ static int current_intensity;
> > >
> > > static int locomolcd_set_intensity(struct backlight_device *bd)
> > > {
> > > - int intensity = bd->props.brightness;
> > > + int intensity = backlight_get_brightness(bd);
> > >
> > > - if (bd->props.power != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > - if (bd->props.fb_blank != FB_BLANK_UNBLANK)
> > > - intensity = 0;
> > > if (locomolcd_flags & LOCOMOLCD_SUSPENDED)
> > > intensity = 0;
> > >
> > > diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c
> > > index c6ad73a784e2..1842ae9a55f8 100644
> > > --- a/drivers/video/backlight/lv5207lp.c
> > > +++ b/drivers/video/backlight/lv5207lp.c
> > > @@ -46,12 +46,7 @@ static int lv5207lp_write(struct lv5207lp *lv, u8 reg, u8 data)
> > > static int lv5207lp_backlight_update_status(struct backlight_device *backlight)
> > > {
> > > struct lv5207lp *lv = bl_get_data(backlight);
> > > - int brightness = backlight->props.brightness;
> > > -
> > > - if (backlight->props.power != FB_BLANK_UNBLANK ||
> > > - backlight->props.fb_blank != FB_BLANK_UNBLANK ||
> > > - backlight->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
> > > - brightness = 0;
> > > + int brightness = backlight_get_brightness(backlight);
> > >
> > > if (brightness) {
> > > lv5207lp_write(lv, LV5207LP_CTRL1,
> > > diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c
> > > index 97cc260ff9d1..e607ec6fd4bf 100644
> > > --- a/drivers/video/backlight/max8925_bl.c
> > > +++ b/drivers/video/backlight/max8925_bl.c
> > > @@ -64,18 +64,7 @@ static int max8925_backlight_set(struct backlight_device *bl, int brightness)
> > >
> > > static int max8925_backlight_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.state & BL_CORE_SUSPENDED)
> > > - brightness = 0;
> > > -
> > > - return max8925_backlight_set(bl, brightness);
> > > + return max8925_backlight_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int max8925_backlight_get_brightness(struct backlight_device *bl)
> > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> > > index 82b8d7594701..eff64db2e02e 100644
> > > --- a/drivers/video/backlight/pwm_bl.c
> > > +++ b/drivers/video/backlight/pwm_bl.c
> > > @@ -108,14 +108,9 @@ static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness)
> > > static int pwm_backlight_update_status(struct backlight_device *bl)
> > > {
> > > struct pwm_bl_data *pb = bl_get_data(bl);
> > > - int brightness = bl->props.brightness;
> > > + int brightness = backlight_get_brightness(bl);
> > > struct pwm_state state;
> > >
> > > - if (bl->props.power != FB_BLANK_UNBLANK ||
> > > - bl->props.fb_blank != FB_BLANK_UNBLANK ||
> > > - bl->props.state & BL_CORE_FBBLANK)
> > > - brightness = 0;
> > > -
> > > if (pb->notify)
> > > brightness = pb->notify(pb->dev, brightness);
> > >
> > > diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
> > > index 4c8c34b99441..94d3b96244f0 100644
> > > --- a/drivers/video/backlight/qcom-wled.c
> > > +++ b/drivers/video/backlight/qcom-wled.c
> > > @@ -433,14 +433,9 @@ static int wled5_ovp_delay(struct wled *wled)
> > > static int wled_update_status(struct backlight_device *bl)
> > > {
> > > struct wled *wled = bl_get_data(bl);
> > > - u16 brightness = bl->props.brightness;
> > > + u16 brightness = backlight_get_brightness(bl);
> > > int rc = 0;
> > >
> > > - if (bl->props.power != FB_BLANK_UNBLANK ||
> > > - bl->props.fb_blank != FB_BLANK_UNBLANK ||
> > > - bl->props.state & BL_CORE_FBBLANK)
> > > - brightness = 0;
> > > -
> > > mutex_lock(&wled->lock);
> > > if (brightness) {
> > > rc = wled->wled_set_brightness(wled, brightness);
> > > diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c
> > > index 762e3feed097..8457166f357f 100644
> > > --- a/drivers/video/backlight/tps65217_bl.c
> > > +++ b/drivers/video/backlight/tps65217_bl.c
> > > @@ -77,15 +77,7 @@ static int tps65217_bl_update_status(struct backlight_device *bl)
> > > {
> > > struct tps65217_bl *tps65217_bl = bl_get_data(bl);
> > > int rc;
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.state & BL_CORE_SUSPENDED)
> > > - brightness = 0;
> > > -
> > > - if ((bl->props.power != FB_BLANK_UNBLANK) ||
> > > - (bl->props.fb_blank != FB_BLANK_UNBLANK))
> > > - /* framebuffer in low power mode or blanking active */
> > > - brightness = 0;
> > > + int brightness = backlight_get_brightness(bl);
> > >
> > > if (brightness > 0) {
> > > rc = tps65217_reg_write(tps65217_bl->tps,
> > > diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c
> > > index e55977d54c15..c5aaee205bdf 100644
> > > --- a/drivers/video/backlight/wm831x_bl.c
> > > +++ b/drivers/video/backlight/wm831x_bl.c
> > > @@ -91,18 +91,7 @@ static int wm831x_backlight_set(struct backlight_device *bl, int brightness)
> > >
> > > static int wm831x_backlight_update_status(struct backlight_device *bl)
> > > {
> > > - int brightness = bl->props.brightness;
> > > -
> > > - if (bl->props.power != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.fb_blank != FB_BLANK_UNBLANK)
> > > - brightness = 0;
> > > -
> > > - if (bl->props.state & BL_CORE_SUSPENDED)
> > > - brightness = 0;
> > > -
> > > - return wm831x_backlight_set(bl, brightness);
> > > + return wm831x_backlight_set(bl, backlight_get_brightness(bl));
> > > }
> > >
> > > static int wm831x_backlight_get_brightness(struct backlight_device *bl)
> > > --
> > > 2.25.1
> > >
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@xxxxxxxxxxxxxxxxxxxxx
> > https://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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