panel: Update CABC function to support force off

Support CABC force off when min_brightness

Bug: 236927968
Test: Dump CABC state when min brightness

Change-Id: I94bccb1a1cd4d8cec0fa4a34ffa9c56f0b7d2669
Signed-off-by: Gil <gilliu@google.com>
(cherry picked from commit 655d6b3586be3a158a407f802adc85474c0c7c3c)

1 files changed, 22 insertions, 14 deletions

diff --git a/samsung/panel/panel-samsung-drv.c b/samsung/panel/panel-samsung-drv.c
index 283ad94..cd53602 100644
--- a/samsung/panel/panel-samsung-drv.c
+++ b/samsung/panel/panel-samsung-drv.c
@@ -851,6 +851,23 @@ static int exynos_get_brightness(struct backlight_device *bl)
 	return bl->props.brightness;
 }
 
+static void exynos_panel_set_cabc(struct exynos_panel *ctx, enum exynos_cabc_mode cabc_mode)
+{
+	const struct exynos_panel_funcs *funcs = ctx->desc->exynos_panel_func;
+	struct backlight_device *bl = ctx->bl;
+	u8 mode;
+	bool force_off = (bl->props.brightness <= ctx->desc->min_brightness);
+
+	if (!funcs || !funcs->set_cabc_mode)
+		return;
+
+	/* force off will not change the cabc_mode node */
+	mode = !force_off ? cabc_mode : CABC_OFF;
+	funcs->set_cabc_mode(ctx, mode);
+	ctx->cabc_mode = cabc_mode;
+	dev_dbg(ctx->dev, "set cabc mode: %d, force_off: %d\n", cabc_mode, force_off);
+}
+
 static int exynos_bl_find_range(struct exynos_panel *ctx,
 				int brightness, u32 *range)
 {
@@ -923,6 +940,9 @@ static int exynos_update_status(struct backlight_device *bl)
 		dev_dbg(ctx->dev, "bl range is changed to %d\n",
 			ctx->bl_notifier.current_range);
 	}
+
+	if (ctx->cabc_mode && brightness)
+		exynos_panel_set_cabc(ctx, ctx->cabc_mode);
 	mutex_unlock(&ctx->mode_lock);
 	return 0;
 }
@@ -1674,20 +1694,6 @@ static void exynos_panel_set_dimming(struct exynos_panel *ctx, bool dimming_on)
 	mutex_unlock(&ctx->mode_lock);
 }
 
-static void exynos_panel_set_cabc(struct exynos_panel *ctx, enum exynos_cabc_mode cabc_mode)
-{
-	const struct exynos_panel_funcs *funcs = ctx->desc->exynos_panel_func;
-
-	if (!funcs || !funcs->set_cabc_mode)
-		return;
-
-	mutex_lock(&ctx->mode_lock);
-	if (cabc_mode != ctx->cabc_mode)
-		funcs->set_cabc_mode(ctx, cabc_mode);
-
-	mutex_unlock(&ctx->mode_lock);
-}
-
 static void exynos_panel_pre_commit_properties(
 				struct exynos_panel *ctx,
 				struct exynos_drm_connector_state *conn_state)
@@ -2556,7 +2562,9 @@ static ssize_t cabc_mode_store(struct device *dev, struct device_attribute *attr
 		return -EINVAL;
 	}
 
+	mutex_lock(&ctx->mode_lock);
 	exynos_panel_set_cabc(ctx, cabc_mode);
+	mutex_unlock(&ctx->mode_lock);
 
 	return count;
 }