[Intel-gfx] [PATCH 4/5] drm/tegra: Handle I2C_WRITE_STATUS_UPDATE for address only writes

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

A address-only I2C_WRITE can't be replied with a short i2c ack, but I
suppose it could be replied with an i2c defer. So the code should be
prepared for an address-only I2C_WRITE_STATUS_UPDATE.

Cc: Thierry Reding <thierry.reding at gmail.com>
Cc: "Terje Bergström" <tbergstrom at nvidia.com>
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/tegra/dpaux.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index b1617af..a48687a 100644
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -122,6 +122,7 @@ static ssize_t tegra_dpaux_transfer(struct drm_dp_aux *aux,
 	 */
 	if (msg->size < 1) {
 		switch (msg->request & ~DP_AUX_I2C_MOT) {
+		case DP_AUX_I2C_WRITE_STATUS_UPDATE:
 		case DP_AUX_I2C_WRITE:
 		case DP_AUX_I2C_READ:
 			value = DPAUX_DP_AUXCTL_CMD_ADDRESS_ONLY;
-- 
2.0.5