linux-kernel - [PATCH 2/6] media: ov5640: Add register definition for test pattern register

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Date:   Fri, 18 Jan 2019 16:52:02 +0800
From:   Chen-Yu Tsai <wens@...e.org>
To:     Steve Longerbeam <slongerbeam@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc:     Chen-Yu Tsai <wens@...e.org>, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Maxime Ripard <maxime.ripard@...tlin.com>
Subject: [PATCH 2/6] media: ov5640: Add register definition for test pattern register

The OV5640 can generate many types of test patterns, some with
additional modifiers, such as a rolling bar, or gamma gradients.

Add the bit definitions for all bits in the test pattern register,
and use them to compose the values to be written to the register.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/media/i2c/ov5640.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 8e4e8fa3685f..22d07b3cc8a2 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -2446,10 +2446,30 @@ static const char * const test_pattern_menu[] = {
 	"Color bars",
 };
 
+#define OV5640_TEST_ENABLE		BIT(7)
+#define OV5640_TEST_ROLLING		BIT(6)	/* rolling horizontal bar */
+#define OV5640_TEST_TRANSPARENT		BIT(5)
+#define OV5640_TEST_SQUARE_BW		BIT(4)	/* black & white squares */
+#define OV5640_TEST_BAR_STANDARD	(0 << 2)
+#define OV5640_TEST_BAR_VERT_CHANGE_1	(1 << 2)
+#define OV5640_TEST_BAR_HOR_CHANGE	(2 << 2)
+#define OV5640_TEST_BAR_VERT_CHANGE_2	(3 << 2)
+#define OV5640_TEST_BAR			(0 << 0)
+#define OV5640_TEST_RANDOM		(1 << 0)
+#define OV5640_TEST_SQUARE		(2 << 0)
+#define OV5640_TEST_BLACK		(3 << 0)
+
+static const u8 test_pattern_val[] = {
+	0,
+	OV5640_TEST_ENABLE | OV5640_TEST_TRANSPARENT |
+		OV5640_TEST_BAR_VERT_CHANGE_1 |
+		OV5640_TEST_BAR,
+};
+
 static int ov5640_set_ctrl_test_pattern(struct ov5640_dev *sensor, int value)
 {
-	return ov5640_mod_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
-			      0xa4, value ? 0xa4 : 0);
+	return ov5640_write_reg(sensor, OV5640_REG_PRE_ISP_TEST_SET1,
+				test_pattern_val[value]);
 }
 
 static int ov5640_set_ctrl_light_freq(struct ov5640_dev *sensor, int value)
-- 
2.20.1