Commit f9934061 authored Aug 27, 2015 by Ville Syrjälä Committed by Daniel Vetter Sep 08, 2015

drm/tegra: Handle I2C_WRITE_STATUS_UPDATE for address only writes

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@gmail.com>
Cc: "Terje Bergström" <tbergstrom@nvidia.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 1f75b29d

drivers/gpu/drm/tegra/dpaux.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -119,6 +119,7 @@ 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;

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