Commit 574f5ee2 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Douglas Anderson
Browse files

drm/bridge: ti-sn65dsi86: Fix multiple instances 



Each bridge instance creates up to four auxiliary devices with different
names.  However, their IDs are always zero, causing duplicate filename
errors when a system has multiple bridges:

    sysfs: cannot create duplicate filename '/bus/auxiliary/devices/ti_sn65dsi86.gpio.0'

Fix this by using a unique instance ID per bridge instance.  The
instance ID is derived from the I2C adapter number and the bridge's I2C
address, to support multiple instances on the same bus.

Fixes: bf73537f ("drm/bridge: ti-sn65dsi86: Break GPIO and MIPI-to-eDP bridge into sub-drivers")
Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarDouglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/7a68a0e3f927e26edca6040067fb653eb06efb79.1733840089.git.geert+renesas@glider.be
parent a7358310

drivers/gpu/drm/bridge/ti-sn65dsi86.c

+2 −0
Original line number Diff line number Diff line
@@ -480,6 +480,7 @@ static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, 
				       const char *name)

{

	struct device *dev = pdata->dev;

	const struct i2c_client *client = to_i2c_client(dev);

	struct auxiliary_device *aux;

	int ret;
@@ -488,6 +489,7 @@ static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, 
		return -ENOMEM;



	aux->name = name;

	aux->id = (client->adapter->nr << 10) | client->addr;

	aux->dev.parent = dev;

	aux->dev.release = ti_sn65dsi86_aux_device_release;

	device_set_of_node_from_dev(&aux->dev, dev);