[media] adv7604: add hdmi driver strength adjustment
The driver strength is board dependent, so set it from the platform_data.
Signed-off-by: Mikhail Khelik <mkhelik@cisco.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/i2c/adv7604.c b/drivers/media/i2c/adv7604.c
index 6372d31..00ce271 100644
--- a/drivers/media/i2c/adv7604.c
+++ b/drivers/media/i2c/adv7604.c
@@ -1942,7 +1942,12 @@
/* TODO from platform data */
cp_write(sd, 0x69, 0x30); /* Enable CP CSC */
io_write(sd, 0x06, 0xa6); /* positive VS and HS */
- io_write(sd, 0x14, 0x7f); /* Drive strength adjusted to max */
+
+ /* Adjust drive strength */
+ io_write(sd, 0x14, 0x40 | pdata->dr_str_data << 4 |
+ pdata->dr_str_clk << 2 |
+ pdata->dr_str_sync);
+
cp_write(sd, 0xba, (pdata->hdmi_free_run_mode << 1) | 0x01); /* HDMI free run */
cp_write(sd, 0xf3, 0xdc); /* Low threshold to enter/exit free run mode */
cp_write(sd, 0xf9, 0x23); /* STDI ch. 1 - LCVS change threshold -
diff --git a/include/media/adv7604.h b/include/media/adv7604.h
index 0c96e16..22fd1ac 100644
--- a/include/media/adv7604.h
+++ b/include/media/adv7604.h
@@ -78,6 +78,12 @@
ADV7604_OP_FORMAT_SEL_SDR_ITU656_24_MODE2 = 0x8a,
};
+enum adv7604_drive_strength {
+ ADV7604_DR_STR_MEDIUM_LOW = 1,
+ ADV7604_DR_STR_MEDIUM_HIGH = 2,
+ ADV7604_DR_STR_HIGH = 3,
+};
+
/* Platform dependent definition */
struct adv7604_platform_data {
/* connector - HDMI or DVI? */
@@ -110,6 +116,11 @@
unsigned replicate_av_codes:1;
unsigned invert_cbcr:1;
+ /* IO register 0x14 */
+ enum adv7604_drive_strength dr_str_data;
+ enum adv7604_drive_strength dr_str_clk;
+ enum adv7604_drive_strength dr_str_sync;
+
/* IO register 0x30 */
unsigned output_bus_lsb_to_msb:1;