The other additional step in the DSI sequence for EHL.
v2:
- Using REG_BIT()(Matt)
- Fixed commit message typo(Vandita)
BSpec: 20597
Cc: Uma Shankar <uma.shankar@xxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/icl_dsi.c | 8 ++++++++
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
2 files changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 8b4d589be4b4..b8673debf932 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -544,6 +544,14 @@ static void gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
I915_WRITE(DSI_TA_TIMING_PARAM(port), tmp);
}
}
+
+ if (IS_ELKHARTLAKE(dev_priv)) {
+ for_each_dsi_port(port, intel_dsi->ports) {
+ tmp = I915_READ(ICL_DPHY_CHKN(port));
+ tmp |= ICL_DPHY_CHKN_AFE_OVER_PPI_STRAP;
+ I915_WRITE(ICL_DPHY_CHKN(port), tmp);
+ }
+ }
}
static void gen11_dsi_gate_clocks(struct intel_encoder *encoder)
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 95b41676ae9d..7e6009cefb18 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -1993,6 +1993,10 @@ enum i915_power_well_id {
#define N_SCALAR(x) ((x) << 24)
#define N_SCALAR_MASK (0x7F << 24)
+#define _ICL_DPHY_CHKN_REG 0x194
+#define ICL_DPHY_CHKN(port) _MMIO(_ICL_COMBOPHY(port) + _ICL_DPHY_CHKN_REG)
+#define ICL_DPHY_CHKN_AFE_OVER_PPI_STRAP REG_BIT(7)
+
#define MG_PHY_PORT_LN(ln, port, ln0p1, ln0p2, ln1p1) \
_MMIO(_PORT((port) - PORT_C, ln0p1, ln0p2) + (ln) * ((ln1p1) - (ln0p1)))
--
2.22.0
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