From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Move intel_dp_training_pattern() upwards to avoid the forward
declaration for the POST_LT_ADJ_REQ stuff.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
.../drm/i915/display/intel_dp_link_training.c | 112 +++++++++---------
1 file changed, 54 insertions(+), 58 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index 8863fc2c44ff..f208b947ef92 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -767,9 +767,62 @@ void intel_dp_link_training_set_bw(struct intel_dp
*intel_dp,
}
}
+/*
+ * Pick Training Pattern Sequence (TPS) for channel equalization. 128b/132b
TPS2
+ * for UHBR+, TPS4 for HBR3 or for 1.4 devices that support it, TPS3 for HBR2
or
+ * 1.2 devices that support it, TPS2 otherwise.
+ */
static u32 intel_dp_training_pattern(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state,
- enum drm_dp_phy dp_phy);
+ enum drm_dp_phy dp_phy)
+{
+ struct intel_display *display = to_intel_display(intel_dp);
+ bool source_tps3, sink_tps3, source_tps4, sink_tps4;
+
+ /* UHBR+ use separate 128b/132b TPS2 */
+ if (intel_dp_is_uhbr(crtc_state))
+ return DP_TRAINING_PATTERN_2;
+
+ /*
+ * TPS4 support is mandatory for all downstream devices that
+ * support HBR3. There are no known eDP panels that support
+ * TPS4 as of Feb 2018 as per VESA eDP_v1.4b_E1 specification.
+ * LTTPRs must support TPS4.
+ */
+ source_tps4 = intel_dp_source_supports_tps4(display);
+ sink_tps4 = dp_phy != DP_PHY_DPRX ||
+ drm_dp_tps4_supported(intel_dp->dpcd);
+ if (source_tps4 && sink_tps4) {
+ return DP_TRAINING_PATTERN_4;
+ } else if (crtc_state->port_clock == 810000) {
+ if (!source_tps4)
+ lt_dbg(intel_dp, dp_phy,
+ "8.1 Gbps link rate without source TPS4
support\n");
+ if (!sink_tps4)
+ lt_dbg(intel_dp, dp_phy,
+ "8.1 Gbps link rate without sink TPS4
support\n");
+ }
+
+ /*
+ * TPS3 support is mandatory for downstream devices that
+ * support HBR2. However, not all sinks follow the spec.
+ */
+ source_tps3 = intel_dp_source_supports_tps3(display);
+ sink_tps3 = dp_phy != DP_PHY_DPRX ||
+ drm_dp_tps3_supported(intel_dp->dpcd);
+ if (source_tps3 && sink_tps3) {
+ return DP_TRAINING_PATTERN_3;
+ } else if (crtc_state->port_clock >= 540000) {
+ if (!source_tps3)
+ lt_dbg(intel_dp, dp_phy,
+ ">=5.4/6.48 Gbps link rate without source TPS3
support\n");
+ if (!sink_tps3)
+ lt_dbg(intel_dp, dp_phy,
+ ">=5.4/6.48 Gbps link rate without sink TPS3
support\n");
+ }
+
+ return DP_TRAINING_PATTERN_2;
+}
static bool intel_dp_use_post_lt_adj_req(struct intel_dp *intel_dp,
const struct intel_crtc_state
*crtc_state)
@@ -971,63 +1024,6 @@ intel_dp_link_training_clock_recovery(struct intel_dp
*intel_dp,
return false;
}
-/*
- * Pick Training Pattern Sequence (TPS) for channel equalization. 128b/132b
TPS2
- * for UHBR+, TPS4 for HBR3 or for 1.4 devices that support it, TPS3 for HBR2
or
- * 1.2 devices that support it, TPS2 otherwise.
- */
-static u32 intel_dp_training_pattern(struct intel_dp *intel_dp,
- const struct intel_crtc_state *crtc_state,
- enum drm_dp_phy dp_phy)
-{
- struct intel_display *display = to_intel_display(intel_dp);
- bool source_tps3, sink_tps3, source_tps4, sink_tps4;
-
- /* UHBR+ use separate 128b/132b TPS2 */
- if (intel_dp_is_uhbr(crtc_state))
- return DP_TRAINING_PATTERN_2;
-
- /*
- * TPS4 support is mandatory for all downstream devices that
- * support HBR3. There are no known eDP panels that support
- * TPS4 as of Feb 2018 as per VESA eDP_v1.4b_E1 specification.
- * LTTPRs must support TPS4.
- */
- source_tps4 = intel_dp_source_supports_tps4(display);
- sink_tps4 = dp_phy != DP_PHY_DPRX ||
- drm_dp_tps4_supported(intel_dp->dpcd);
- if (source_tps4 && sink_tps4) {
- return DP_TRAINING_PATTERN_4;
- } else if (crtc_state->port_clock == 810000) {
- if (!source_tps4)
- lt_dbg(intel_dp, dp_phy,
- "8.1 Gbps link rate without source TPS4
support\n");
- if (!sink_tps4)
- lt_dbg(intel_dp, dp_phy,
- "8.1 Gbps link rate without sink TPS4
support\n");
- }
-
- /*
- * TPS3 support is mandatory for downstream devices that
- * support HBR2. However, not all sinks follow the spec.
- */
- source_tps3 = intel_dp_source_supports_tps3(display);
- sink_tps3 = dp_phy != DP_PHY_DPRX ||
- drm_dp_tps3_supported(intel_dp->dpcd);
- if (source_tps3 && sink_tps3) {
- return DP_TRAINING_PATTERN_3;
- } else if (crtc_state->port_clock >= 540000) {
- if (!source_tps3)
- lt_dbg(intel_dp, dp_phy,
- ">=5.4/6.48 Gbps link rate without source TPS3
support\n");
- if (!sink_tps3)
- lt_dbg(intel_dp, dp_phy,
- ">=5.4/6.48 Gbps link rate without sink TPS3
support\n");
- }
-
- return DP_TRAINING_PATTERN_2;
-}
-
/*
* Perform the link training channel equalization phase on the given DP PHY
* using one of training pattern 2, 3 or 4 depending on the source and
--
2.45.3
