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>
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@ -119,6 +119,7 @@ static ssize_t tegra_dpaux_transfer(struct drm_dp_aux *aux,
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*/
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if (msg->size < 1) {
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switch (msg->request & ~DP_AUX_I2C_MOT) {
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case DP_AUX_I2C_WRITE_STATUS_UPDATE:
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case DP_AUX_I2C_WRITE:
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case DP_AUX_I2C_READ:
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value = DPAUX_DP_AUXCTL_CMD_ADDRESS_ONLY;
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