From: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx> The driver does not check AUX_IRQ_STATUS_NAT_I2C_FAIL bit at all when sending AUX transfers, which leads to the driver not returning an error. Add the check. Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx> --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 90bbabde1595..ba84215c1511 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -582,6 +582,11 @@ static ssize_t ti_sn_aux_transfer(struct drm_dp_aux *aux, goto exit; } + if (val & AUX_IRQ_STATUS_NAT_I2C_FAIL) { + ret = -EIO; + goto exit; + } + if (val & AUX_IRQ_STATUS_AUX_SHORT) { ret = regmap_read(pdata->regmap, SN_AUX_LENGTH_REG, &len); if (ret) -- 2.34.1