Add a helper for getting the DP PHY name. In the interest of caller
simplicity and to avoid allocations and passing in of buffers, duplicate
the const strings to return. It's a minor penalty to pay for simplicity
in all the call sites.
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
---
drivers/gpu/drm/drm_dp_helper.c | 21 +++++++++++++++++++++
include/drm/drm_dp_helper.h | 2 ++
2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 4d0d1e8e51fa..f1d03b5a4bab 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -197,6 +197,27 @@ void drm_dp_link_train_channel_eq_delay(const struct drm_dp_aux *aux,
}
EXPORT_SYMBOL(drm_dp_link_train_channel_eq_delay);
+const char *drm_dp_phy_name(enum drm_dp_phy dp_phy)
+{
+ static const char * const phy_names[] = {
+ [DP_PHY_DPRX] = "DPRX",
+ [DP_PHY_LTTPR1] = "LTTPR 1",
+ [DP_PHY_LTTPR2] = "LTTPR 2",
+ [DP_PHY_LTTPR3] = "LTTPR 3",
+ [DP_PHY_LTTPR4] = "LTTPR 4",
+ [DP_PHY_LTTPR5] = "LTTPR 5",
+ [DP_PHY_LTTPR6] = "LTTPR 6",
+ [DP_PHY_LTTPR7] = "LTTPR 7",
+ [DP_PHY_LTTPR8] = "LTTPR 8",
+ };
+
+ if (dp_phy < 0 || dp_phy >= ARRAY_SIZE(phy_names))
+ return "<INVALID DP PHY>";
+
+ return phy_names[dp_phy];
+}
+EXPORT_SYMBOL(drm_dp_phy_name);
+
void drm_dp_lttpr_link_train_clock_recovery_delay(void)
{
usleep_range(100, 200);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index b52df4db3e8f..c873e6349b41 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -2115,6 +2115,8 @@ bool drm_dp_read_sink_count_cap(struct drm_connector *connector,
const struct drm_dp_desc *desc);
int drm_dp_read_sink_count(struct drm_dp_aux *aux);
+const char *drm_dp_phy_name(enum drm_dp_phy dp_phy);
+
int drm_dp_read_lttpr_common_caps(struct drm_dp_aux *aux,
u8 caps[DP_LTTPR_COMMON_CAP_SIZE]);
int drm_dp_read_lttpr_phy_caps(struct drm_dp_aux *aux,
--
2.30.2
