diff options
Diffstat (limited to 'bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0431-media-i2c-ti9x4-update-remote-gpio-function.patch')
| -rw-r--r-- | bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0431-media-i2c-ti9x4-update-remote-gpio-function.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0431-media-i2c-ti9x4-update-remote-gpio-function.patch b/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0431-media-i2c-ti9x4-update-remote-gpio-function.patch new file mode 100644 index 00000000..79006e58 --- /dev/null +++ b/bsp/meta-rcar/meta-rcar-gen3-adas/recipes-kernel/linux/linux-renesas/0431-media-i2c-ti9x4-update-remote-gpio-function.patch @@ -0,0 +1,53 @@ +From 9098f3a6deac6fb81695cf7fbf97e32ac3e0c399 Mon Sep 17 00:00:00 2001 +From: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +Date: Fri, 15 Nov 2019 14:31:52 +0300 +Subject: [PATCH] media: i2c: ti9x4: update remote gpio function + +Enable only FSIN for remote gpio, all permanent states (0 or 1) setup on serializer side: +this avoids intermittent remote gpio noise (f.e. reset or spuriouse fsin) caused by +unstable/bad link, hence unstable backchannel + +Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com> +--- + drivers/media/i2c/soc_camera/ti9x4.c | 19 +++++++++++++++++-- + 1 file changed, 17 insertions(+), 2 deletions(-) + +diff --git a/drivers/media/i2c/soc_camera/ti9x4.c b/drivers/media/i2c/soc_camera/ti9x4.c +index 0cfcfaa..aa85d92 100644 +--- a/drivers/media/i2c/soc_camera/ti9x4.c ++++ b/drivers/media/i2c/soc_camera/ti9x4.c +@@ -327,14 +327,29 @@ static int ti9x4_initialize(struct i2c_client *client) + reg8_write(client, 0x4c, (idx << 4) | (1 << idx)); /* Select RX port number */ + usleep_range(1000, 1500); /* wait 1ms */ + ++ /* ++ * Enable only FSIN for remote gpio, all permanent states (0 or 1) setup on serializer side: ++ * this avoids intermittent remote gpio noise (f.e. reset or spuriouse fsin) caused by ++ * unstable/bad link, hence unstable backchannel ++ */ + client->addr = priv->ti9x3_addr_map[idx]; /* TI9X3 I2C addr */ + switch (priv->ser_id) { + case TI913_ID: + reg8_write(client, 0x0d, 0x55); /* Enable remote GPIO0/1 */ + break; + case TI953_ID: +- reg8_write(client, 0x0d, 0xf0); /* Enable all remote GPIOs */ +- reg8_write(client, 0x0e, 0xf0); /* Enable serializer GPIOs */ ++ reg8_write(client, 0x0d, (priv->gpio[0] & 0x1) << 0 | ++ (priv->gpio[1] & 0x1) << 1 | ++ (priv->gpio[2] & 0x1) << 2 | ++ (priv->gpio[3] & 0x1) << 3 | ++ (priv->gpio[0] & 0x2) << 3 | ++ (priv->gpio[1] & 0x2) << 4 | ++ (priv->gpio[2] & 0x2) << 5 | ++ (priv->gpio[3] & 0x2) << 6); /* Enable FSIN remote GPIOs and set local constant gpios */ ++ reg8_write(client, 0x0e, (!!priv->gpio[0] << 4) | ++ (!!priv->gpio[1] << 5) | ++ (!!priv->gpio[2] << 6) | ++ (!!priv->gpio[3] << 7)); /* Enable serializer GPIOs only for output */ + break; + } + client->addr = priv->des_addr; +-- +2.7.4 + |