linux/drivers/gpu
Antonio Borneo 9cc4853e47
drm: adv7511: override i2c address of cec before accessing it
Commit 680532c50b ("drm: adv7511: Add support for
i2c_new_secondary_device") allows a device tree node to override
the default addresses of the secondary i2c devices. This is useful
for solving address conflicts on the i2c bus.

In adv7511_init_cec_regmap() the new i2c address of cec device is
read from device tree and immediately accessed, well before it is
written in the proper register to override the default address.
This can cause an i2c error during probe and a consequent probe
failure.

Once the new i2c address is read from the device tree, override
the default address before any attempt to access the cec.

Tested with adv7533 and stm32mp157f.

Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Fixes: 680532c50b ("drm: adv7511: Add support for i2c_new_secondary_device")
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220607213144.427177-1-antonio.borneo@foss.st.com
2022-06-10 10:11:14 +02:00
..
drm drm: adv7511: override i2c address of cec before accessing it 2022-06-10 10:11:14 +02:00
host1x gpu: host1x: Fix a memory leak in 'host1x_remove()' 2022-03-01 11:13:09 +01:00
ipu-v3 gpu: ipu-v3: Fix dev_dbg frequency output 2022-04-04 09:37:42 +02:00
trace
vga PCI/VGA: Move vgaarb to drivers/pci 2022-03-09 18:30:46 -06:00
Makefile