From: Ville Syrjälä Date: Thu, 27 Aug 2015 14:23:28 +0000 (+0300) Subject: drm/radeon: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE X-Git-Tag: Ubuntu-snapdragon-4.4.0-1029.32~5570^2~31^2~37 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=1f75b29d3fc9abb06b095860f9312f8190e6015b;p=mirror_ubuntu-zesty-kernel.git drm/radeon: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE When we get an i2c defer or short ack for i2c-over-aux write we need to switch to WRITE_STATUS_UPDATE to poll for the completion of the original request. Looks like radeon doesn't do anything special with the request type, so hopefully just treating it the same as a i2c write is enough. Cc: Alex Deucher Cc: "Christian König" Acked-by: Alex Deucher Signed-off-by: Ville Syrjälä Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 9cd49c584263..bd73b4069069 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -179,6 +179,7 @@ radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) switch (msg->request & ~DP_AUX_I2C_MOT) { case DP_AUX_NATIVE_WRITE: case DP_AUX_I2C_WRITE: + case DP_AUX_I2C_WRITE_STATUS_UPDATE: /* The atom implementation only supports writes with a max payload of * 12 bytes since it uses 4 bits for the total count (header + payload) * in the parameter space. The atom interface supports 16 byte