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media: i2c: change sc3338 gain times from 1000 to 128

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Signed-off-by: Su Yuefu <yuefu.su@rock-chips.com>
Change-Id: I7bc0aa6bea913a4d5c64aec5a595d9c0960b83cf
This commit is contained in:
Su Yuefu
2022-09-08 14:22:02 +08:00
committed by Tao Huang
parent 3d8de4fc14
commit 1a5d2a8da4
1 changed files with 22 additions and 21 deletions
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43
drivers/media/i2c/sc3338.c
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@@ -417,54 +417,55 @@ static int sc3338_set_gain_reg(struct sc3338 *sc3338, u32 gain)
{
struct i2c_client *client = sc3338->client;
u32 coarse_again = 0, coarse_dgain = 0, fine_dgain = 0;
int ret = 0;
int ret = 0, gain_factor;
if (gain < 128)
gain = 128;
else if (gain > SC3338_GAIN_MAX)
gain = SC3338_GAIN_MAX;
if (gain < 1520) {
gain_factor = gain * 1000 / 128;
if (gain_factor < 1520) {
coarse_again = 0x00;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 1000;
} else if (gain < 3040) {
fine_dgain = gain_factor * 128 / 1000;
} else if (gain_factor < 3040) {
coarse_again = 0x40;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 1520;
} else if (gain < 6080) {
fine_dgain = gain_factor * 128 / 1520;
} else if (gain_factor < 6080) {
coarse_again = 0x48;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 3040;
} else if (gain < 12160) {
fine_dgain = gain_factor * 128 / 3040;
} else if (gain_factor < 12160) {
coarse_again = 0x49;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 6080;
} else if (gain < 24320) {
fine_dgain = gain_factor * 128 / 6080;
} else if (gain_factor < 24320) {
coarse_again = 0x4b;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 12160;
} else if (gain < 48640) {
fine_dgain = gain_factor * 128 / 12160;
} else if (gain_factor < 48640) {
coarse_again = 0x4f;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 24320;
} else if (gain < 48640 * 2) {
fine_dgain = gain_factor * 128 / 24320;
} else if (gain_factor < 48640 * 2) {
//open dgain begin max digital gain 4X
coarse_again = 0x5f;
coarse_dgain = 0x00;
fine_dgain = gain * 128 / 48640;
} else if (gain < 48640 * 4) {
fine_dgain = gain_factor * 128 / 48640;
} else if (gain_factor < 48640 * 4) {
coarse_again = 0x5f;
coarse_dgain = 0x01;
fine_dgain = gain * 128 / 48640 / 2;
} else if (gain < 48640 * 8) {
fine_dgain = gain_factor * 128 / 48640 / 2;
} else if (gain_factor < 48640 * 8) {
coarse_again = 0x5f;
coarse_dgain = 0x03;
fine_dgain = gain * 128 / 48640 / 4;
} else if (gain < 48640 * 16) {
fine_dgain = gain_factor * 128 / 48640 / 4;
} else if (gain_factor < 48640 * 16) {
coarse_again = 0x5f;
coarse_dgain = 0x07;
fine_dgain = gain * 128 / 48640 / 8;
fine_dgain = gain_factor * 128 / 48640 / 8;
}
dev_dbg(&client->dev, "c_again: 0x%x, c_dgain: 0x%x, f_dgain: 0x%0x\n",
coarse_again, coarse_dgain, fine_dgain);