The auo,b101uan08.3 panel (already supported by this driver) has a 3.3V rail that needs to be turned on. For previous users of this panel this voltage was directly output by pmic. On a new user (the not-yet-upstream sc7180-trogdor-mrbland board) we need to turn the 3.3V rail on. Add support in the driver for this.

Signed-off-by: yangcong yangcong5@huaqin.corp-partner.google.com --- drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 11 +++++++++++ 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c index db9d0b86d542..9a644433629e 100644 --- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c +++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c @@ -45,6 +45,7 @@ struct boe_panel { const struct panel_desc *desc;

enum drm_panel_orientation orientation; + struct regulator *pp3300; struct regulator *pp1800; struct regulator *avee; struct regulator *avdd; @@ -511,6 +512,7 @@ static int boe_panel_unprepare(struct drm_panel *panel) gpiod_set_value(boe->enable_gpio, 0); usleep_range(5000, 7000); regulator_disable(boe->pp1800); + regulator_disable(boe->pp3300); } else { gpiod_set_value(boe->enable_gpio, 0); usleep_range(500, 1000); @@ -518,6 +520,7 @@ static int boe_panel_unprepare(struct drm_panel *panel) regulator_disable(boe->avdd); usleep_range(5000, 7000); regulator_disable(boe->pp1800); + regulator_disable(boe->pp3300); }

boe->prepared = false; @@ -536,6 +539,10 @@ static int boe_panel_prepare(struct drm_panel *panel) gpiod_set_value(boe->enable_gpio, 0); usleep_range(1000, 1500);

+ ret = regulator_enable(boe->pp3300); + if (ret < 0) + return ret; + ret = regulator_enable(boe->pp1800); if (ret < 0) return ret; @@ -767,6 +774,10 @@ static int boe_panel_add(struct boe_panel *boe) if (IS_ERR(boe->avee)) return PTR_ERR(boe->avee);

+ boe->pp3300 = devm_regulator_get(dev, "pp3300"); + if (IS_ERR(boe->pp3300)) + return PTR_ERR(boe->pp3300); + boe->pp1800 = devm_regulator_get(dev, "pp1800"); if (IS_ERR(boe->pp1800)) return PTR_ERR(boe->pp1800);