On Fri, 2018-12-07 at 16:57 -0800, Dhinakaran Pandiyan wrote:
> On Fri, 2018-09-28 at 21:04 +0300, Ville Syrjala wrote:
> > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> >
> > Decode the NAK reply fields to make it easier to parse the logs.
>
> A lot better than seeing the error codes.
>
>
> 0-day's found a conflicting definition that's missing an undef. With
> that addressed,
> Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> >
> > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/drm_dp_mst_topology.c | 65
> > ++++++++++++++++++++++++++++++++++-
> > include/drm/drm_dp_helper.h | 1 +
> > 2 files changed, 65 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c
> > b/drivers/gpu/drm/drm_dp_mst_topology.c
> > index c0f754364cc7..1178c1655f9a 100644
> > --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> > +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> > @@ -66,6 +66,64 @@ static bool drm_dp_validate_guid(struct
> > drm_dp_mst_topology_mgr *mgr,
> > static int drm_dp_mst_register_i2c_bus(struct drm_dp_aux *aux);
> > static void drm_dp_mst_unregister_i2c_bus(struct drm_dp_aux *aux);
> > static void drm_dp_mst_kick_tx(struct drm_dp_mst_topology_mgr
> > *mgr);
> > +
> > +#define STR(x) [DP_ ## x] = #x
> > +
> > +static const char *drm_dp_mst_req_type_str(u8 req_type)
> > +{
> > + static const char * const req_type_str[] = {
> > + STR(GET_MSG_TRANSACTION_VERSION),
> > + STR(LINK_ADDRESS),
> > + STR(CONNECTION_STATUS_NOTIFY),
> > + STR(ENUM_PATH_RESOURCES),
> > + STR(ALLOCATE_PAYLOAD),
> > + STR(QUERY_PAYLOAD),
> > + STR(RESOURCE_STATUS_NOTIFY),
> > + STR(CLEAR_PAYLOAD_ID_TABLE),
> > + STR(REMOTE_DPCD_READ),
> > + STR(REMOTE_DPCD_WRITE),
> > + STR(REMOTE_I2C_READ),
> > + STR(REMOTE_I2C_WRITE),
> > + STR(POWER_UP_PHY),
> > + STR(POWER_DOWN_PHY),
> > + STR(SINK_EVENT_NOTIFY),
> > + STR(QUERY_STREAM_ENC_STATUS),
> > + };
> > +
> > + if (req_type >= ARRAY_SIZE(req_type_str) ||
> > + !req_type_str[req_type])
> > + return "unknown";
> > +
> > + return req_type_str[req_type];
> > +}
drm_dp_sideband_parse_reply() could also use the decoded string.
-DK
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