[Intel-gfx] [PATCH 2/5] drm/i915: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE

[Jani Nikula]

On Fri, 13 Mar 2015, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> 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.
>
> i915 doesn't try to interpret wht request type apart from separating
> reads from writes, and so we should be able to treat this the same as
> a normal i2c write.
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Jani Nikula <jani.nikula at intel.com>

Probably needs a refresh due to context change due to my short writes
patch though.

> ---
>  drivers/gpu/drm/i915/intel_dp.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
> index 33d5877..aed5f26 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -956,6 +956,7 @@ intel_dp_aux_transfer(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:
>  		txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
>  		rxsize = 1;
>  
> -- 
> 2.0.5
>
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-- 
Jani Nikula, Intel Open Source Technology Center