shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 20:07:46 +09:00
Code Issues Packages Projects Releases Wiki Activity

media: i2c: imx415: modify hdr ae function according to datasheet

Browse Source 
Signed-off-by: Yiqing Zeng <zack.zeng@rock-chips.com>
Change-Id: Id51708f7e0ce45d96490669b9057f7435dfb9d2e
This commit is contained in:
Yiqing Zeng
2020-08-13 17:06:43 +08:00
committed by Tao Huang
parent 8d7e60f319
commit 57ea14e007
1 changed files with 27 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/media/i2c/imx415.c
View File

@@ -10,6 +10,9 @@
* 0x3260 should be set 0x01 in normal mode,
* should be 0x00 in hdr mode.
* 2. rhs1 should be 4n+1 when set hdr ae.
* V0.0X01.0X02
* 1. shr0 should be greater than (rsh1 + 9).
* 2. rhs1 should be ceil to 4n + 1.
*/
#define DEBUG
@@ -32,7 +35,7 @@
#include <linux/pinctrl/consumer.h>
#include <linux/rk-preisp.h>
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x01)
#define DRIVER_VERSION KERNEL_VERSION(0, 0x01, 0x02)
#ifndef V4L2_CID_DIGITAL_GAIN
#define V4L2_CID_DIGITAL_GAIN V4L2_CID_GAIN
@@ -973,7 +976,7 @@ static int imx415_set_hdrae(struct imx415 *imx415,
struct i2c_client *client = imx415->client;
u32 l_exp_time, m_exp_time, s_exp_time;
u32 l_a_gain, m_a_gain, s_a_gain;
u32 shr1, shr0, rhs1, rhs1_max, rhs1_min;
int shr1, shr0, rhs1, rhs1_max, rhs1_min;
static int rhs1_old = IMX415_RHS1_DEFAULT;
int ret = 0;
u32 fsc;
@@ -1013,31 +1016,35 @@ static int imx415_set_hdrae(struct imx415 *imx415,
IMX415_REG_VALUE_08BIT, IMX415_FETCH_GAIN_L(s_a_gain));
/* Restrictions
* FSC = 2 * VMAX
* FSC = 2 * VMAX and FSC should be 4n;
* exp_l = FSC - SHR0 + Toffset;
* SHR0 = FSC - exp_l + Toffset
* SHR0 <= (FSC -8)
* exp_l should be even value;
*
* exp_s = RHS1 - SHR1 + Toffset
* RHS1 < BRL * 2
* RHS1 <= SHR0 - 9
* RHS1 >= SHR1 + 8
* SHR1 >= 9
* SHR0 = FSC - exp_l + Toffset;
* SHR0 <= (FSC -8);
* SHR0 >= RHS1 + 9;
* SHR0 should be 2n;
*
* RHS1(n+1) >= RHS1(n) + BRL * 2 -FSC + 2
* exp_s = RHS1 - SHR1 + Toffset;
* exp_s should be even value;
*
* RHS1 and SHR1 shall be odd value
* RHS1 < BRL * 2;
* RHS1 <= SHR0 - 9;
* RHS1 >= SHR1 + 8;
* SHR1 >= 9;
* RHS1(n+1) >= RHS1(n) + BRL * 2 -FSC + 2;
*
* SHR1 should be 2n+1 and RHS1 should be 4n+1;
*/
/* The HDR mode vts is double by default to workaround T-line */
fsc = imx415->cur_vts;
shr0 = clamp(fsc - l_exp_time, 9u, fsc - 8u);
shr0 = fsc - l_exp_time;
rhs1_max = min((RHS1_MAX / 4 * 4 + 1), ((shr0 - 9u) / 4 * 4 + 1));
rhs1_min = max(SHR1_MIN + 8u, rhs1_old + 2 * BRL - fsc + 2);
rhs1_min = (rhs1_min + 3) / 4 * 4 + 1;
rhs1 = (SHR1_MIN + s_exp_time) / 4 * 4 + 1;/* shall be 4n + 1 */
rhs1 = (SHR1_MIN + s_exp_time + 3) / 4 * 4 + 1;/* shall be 4n + 1 */
rhs1 = clamp(rhs1, rhs1_min, rhs1_max);
dev_dbg(&client->dev,
"line(%d) rhs1 %d, short time %d rhs1_old %d, rhs1_new %d\n",
@@ -1053,6 +1060,11 @@ static int imx415_set_hdrae(struct imx415 *imx415,
shr1 = rhs1 - s_exp_time;
}
if (shr0 < rhs1 + 9)
shr0 = rhs1 + 9;
else if (shr0 > fsc - 8)
shr0 = fsc - 8;
dev_dbg(&client->dev,
"fsc=%d,RHS1_MAX=%d,SHR1_MIN=%d,rhs1_max=%d\n",
fsc, RHS1_MAX, SHR1_MIN, rhs1_max);