EHL only differs from ICL on the voltage swing table for HBR2 and
HBR3.
BSpec: 21257
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 34 +++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 1ab638e17046..3060cc37e1d2 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -568,6 +568,20 @@ static const struct cnl_ddi_buf_trans icl_combo_phy_ddi_translations_hdmi[] = {
{ 0x6, 0x7F, 0x35, 0x00, 0x0A }, /* 600 850 3.0 */
};
+static const struct cnl_ddi_buf_trans ehl_combo_phy_ddi_translations_hbr2_hbr3[] = {
+ /* NT mV Trans mV db */
+ { 0xA, 0x33, 0x3F, 0x00, 0x00 }, /* 350 350 0.0 */
+ { 0xA, 0x47, 0x36, 0x00, 0x09 }, /* 350 500 3.1 */
+ { 0xC, 0x64, 0x30, 0x00, 0x0F }, /* 350 700 6.0 */
+ { 0x6, 0x7F, 0x2C, 0x00, 0x13 }, /* 350 900 8.2 */
+ { 0xA, 0x46, 0x3F, 0x00, 0x00 }, /* 500 500 0.0 */
+ { 0xC, 0x64, 0x36, 0x00, 0x09 }, /* 500 700 2.9 */
+ { 0x6, 0x7F, 0x30, 0x00, 0x0F }, /* 500 900 5.1 */
+ { 0xC, 0x61, 0x3F, 0x00, 0x00 }, /* 650 700 0.6 */
+ { 0x6, 0x7F, 0x37, 0x00, 0x08 }, /* 600 900 3.5 */
+ { 0x6, 0x7F, 0x3F, 0x00, 0x00 }, /* 900 900 0.0 */
+};
+
struct icl_mg_phy_ddi_buf_trans {
u32 cri_txdeemph_override_5_0;
u32 cri_txdeemph_override_11_6;
@@ -929,6 +943,18 @@ icl_get_combo_buf_trans(struct drm_i915_private *dev_priv, int type, int rate,
return icl_combo_phy_ddi_translations_dp_hbr2;
}
+static const struct cnl_ddi_buf_trans *
+ehl_get_combo_buf_trans(struct drm_i915_private *dev_priv, int type, int rate,
+ int *n_entries)
+{
+ if (type == INTEL_OUTPUT_DP && rate > 270000) {
+ *n_entries = ARRAY_SIZE(ehl_combo_phy_ddi_translations_hbr2_hbr3);
+ return ehl_combo_phy_ddi_translations_hbr2_hbr3;
+ }
+
+ return icl_get_combo_buf_trans(dev_priv, type, rate, n_entries);
+}
+
static const struct cnl_ddi_buf_trans *
tgl_get_combo_buf_trans(struct drm_i915_private *dev_priv, int type, int rate,
int *n_entries)
@@ -2415,7 +2441,10 @@ u8 intel_ddi_dp_voltage_max(struct intel_encoder *encoder)
else
n_entries = ARRAY_SIZE(tgl_dkl_phy_dp_ddi_trans);
} else if (INTEL_GEN(dev_priv) == 11) {
- if (intel_phy_is_combo(dev_priv, phy))
+ if (IS_ELKHARTLAKE(dev_priv))
+ ehl_get_combo_buf_trans(dev_priv, encoder->type,
+ intel_dp->link_rate, &n_entries);
+ else if (intel_phy_is_combo(dev_priv, phy))
icl_get_combo_buf_trans(dev_priv, encoder->type,
intel_dp->link_rate, &n_entries);
else
@@ -2608,6 +2637,9 @@ static void icl_ddi_combo_vswing_program(struct drm_i915_private *dev_priv,
if (INTEL_GEN(dev_priv) >= 12)
ddi_translations = tgl_get_combo_buf_trans(dev_priv, type, rate,
&n_entries);
+ else if (IS_ELKHARTLAKE(dev_priv))
+ ddi_translations = ehl_get_combo_buf_trans(dev_priv, type, rate,
+ &n_entries);
else
ddi_translations = icl_get_combo_buf_trans(dev_priv, type, rate,
&n_entries);
--
2.25.0
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