Hi Sam, Thank you for the patch.
On Mon, Dec 02, 2019 at 08:32:07PM +0100, Sam Ravnborg wrote: > Use drm_panel infrastructure for backlight. > Replace direct calls with drm_panel_*() calls > to utilize the drm_panel support. > > Signed-off-by: Sam Ravnborg <[email protected]> > cc: Laurent Pinchart <[email protected]> > Cc: Thierry Reding <[email protected]> > Cc: Sam Ravnborg <[email protected]> > --- > drivers/gpu/drm/panel/panel-simple.c | 50 ++++++---------------------- > 1 file changed, 11 insertions(+), 39 deletions(-) > > diff --git a/drivers/gpu/drm/panel/panel-simple.c > b/drivers/gpu/drm/panel/panel-simple.c > index 72f69709f349..a5df6d6dd455 100644 > --- a/drivers/gpu/drm/panel/panel-simple.c > +++ b/drivers/gpu/drm/panel/panel-simple.c > @@ -21,7 +21,6 @@ > * DEALINGS IN THE SOFTWARE. > */ > > -#include <linux/backlight.h> > #include <linux/delay.h> > #include <linux/gpio/consumer.h> > #include <linux/module.h> > @@ -105,7 +104,6 @@ struct panel_simple { > > const struct panel_desc *desc; > > - struct backlight_device *backlight; > struct regulator *supply; > struct i2c_adapter *ddc; > > @@ -236,12 +234,6 @@ static int panel_simple_disable(struct drm_panel *panel) > if (!p->enabled) > return 0; > > - if (p->backlight) { > - p->backlight->props.power = FB_BLANK_POWERDOWN; > - p->backlight->props.state |= BL_CORE_FBBLANK; > - backlight_update_status(p->backlight); > - } > - > if (p->desc->delay.disable) > msleep(p->desc->delay.disable); > > @@ -307,12 +299,6 @@ static int panel_simple_enable(struct drm_panel *panel) > if (p->desc->delay.enable) > msleep(p->desc->delay.enable); > > - if (p->backlight) { > - p->backlight->props.state &= ~BL_CORE_FBBLANK; > - p->backlight->props.power = FB_BLANK_UNBLANK; > - backlight_update_status(p->backlight); > - } > - > p->enabled = true; > > return 0; > @@ -414,9 +400,9 @@ static void panel_simple_parse_panel_timing_node(struct > device *dev, > > static int panel_simple_probe(struct device *dev, const struct panel_desc > *desc) > { > - struct device_node *backlight, *ddc; > struct panel_simple *panel; > struct display_timing dt; > + struct device_node *ddc; > int err; > > panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); > @@ -442,24 +428,13 @@ static int panel_simple_probe(struct device *dev, const > struct panel_desc *desc) > return err; > } > > - backlight = of_parse_phandle(dev->of_node, "backlight", 0); > - if (backlight) { > - panel->backlight = of_find_backlight_by_node(backlight); > - of_node_put(backlight); > - > - if (!panel->backlight) > - return -EPROBE_DEFER; > - } > - > ddc = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); > if (ddc) { > panel->ddc = of_find_i2c_adapter_by_node(ddc); > of_node_put(ddc); > > - if (!panel->ddc) { > - err = -EPROBE_DEFER; > - goto free_backlight; > - } > + if (!panel->ddc) > + return -EPROBE_DEFER; > } > > if (!of_get_display_timing(dev->of_node, "panel-timing", &dt)) > @@ -468,6 +443,10 @@ static int panel_simple_probe(struct device *dev, const > struct panel_desc *desc) > drm_panel_init(&panel->base, dev, &panel_simple_funcs, > desc->connector_type); > > + err = drm_panel_of_backlight(&panel->base); > + if (err) > + goto free_ddc; > + > err = drm_panel_add(&panel->base); > if (err < 0) > goto free_ddc; > @@ -479,9 +458,6 @@ static int panel_simple_probe(struct device *dev, const > struct panel_desc *desc) > free_ddc: > if (panel->ddc) > put_device(&panel->ddc->dev); > -free_backlight: > - if (panel->backlight) > - put_device(&panel->backlight->dev); > > return err; > } > @@ -491,16 +467,12 @@ static int panel_simple_remove(struct device *dev) > struct panel_simple *panel = dev_get_drvdata(dev); > > drm_panel_remove(&panel->base); > - > - panel_simple_disable(&panel->base); > - panel_simple_unprepare(&panel->base); > + drm_panel_disable(&panel->base); > + drm_panel_unprepare(&panel->base); > > if (panel->ddc) > put_device(&panel->ddc->dev); > > - if (panel->backlight) > - put_device(&panel->backlight->dev); > - > return 0; > } > > @@ -508,8 +480,8 @@ static void panel_simple_shutdown(struct device *dev) > { > struct panel_simple *panel = dev_get_drvdata(dev); > > - panel_simple_disable(&panel->base); > - panel_simple_unprepare(&panel->base); > + drm_panel_disable(&panel->base); > + drm_panel_unprepare(&panel->base); Without your panel double-disable protection series, you risk disabling the backlight twice. I think backlight_disable() will work fine, but you may want to double-check. With this checked (and possibly addressed if needed), Reviewed-by: Laurent Pinchart <[email protected]> > } > > static const struct drm_display_mode ampire_am_480272h3tmqw_t01h_mode = { -- Regards, Laurent Pinchart _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
