From: Wooki Min <wooki.min@samsung.com>
Date: Tue, 29 May 2018 11:16:58 +0000 (+0900)
Subject: [COMMON] fimc-is2: add preventing logic regarding to pattern generator on/off
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=81c16e5d72190dc668cbbbb03678b6d37b4c0e4b;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] fimc-is2: add preventing logic regarding to pattern generator on/off

The pattern generator should be enabled while camera is not running.
So, a checking state is added if pattern generator can be enable or not.

Change-Id: I0664949d7c31c69d52cfcc68bfbfc7d8928201b4
Signed-off-by: Wooki Min <wooki.min@samsung.com>
---

diff --git a/drivers/media/platform/exynos/fimc-is2/fimc-is-core.c b/drivers/media/platform/exynos/fimc-is2/fimc-is-core.c
index ab738eff97d1..8d6d58976edf 100644
--- a/drivers/media/platform/exynos/fimc-is2/fimc-is-core.c
+++ b/drivers/media/platform/exynos/fimc-is2/fimc-is-core.c
@@ -603,6 +603,8 @@ static ssize_t store_pattern_en(struct device *dev,
 {
 	int ret = 0;
 	unsigned long cmd;
+	struct fimc_is_core *core =
+		(struct fimc_is_core *)platform_get_drvdata(to_platform_device(dev));
 
 	ret = kstrtoul(buf, 0, &cmd);
 	if (ret)
@@ -611,7 +613,10 @@ static ssize_t store_pattern_en(struct device *dev,
 	switch (cmd) {
 	case 0:
 	case 1:
-		sysfs_debug.pattern_en = cmd;
+		if (atomic_read(&core->rsccount))
+			pr_warn("%s: patter generator cannot be enabled while camera is running.\n", __func__);
+		else
+			sysfs_debug.pattern_en = cmd;
 		break;
 	default:
 		pr_warn("%s: invalid paramter (%lu)\n", __func__, cmd);