[PATCH v11 3/8] drm/i915/bios: print VS/PE-O port info

Issue a debug message when port asks to override default Vswing /
Preemphasis tables.

Add helper intel_bios_encoder_requests_vspeo() to check if port
requests for overriding default VS/PE tables.

v6->v7
- expand VS/PE-O acronym in debug logging (Jani)

v3->v4
- change debug message when requesting VS/PE-O (Suraj)

Signed-off-by: Michał Grzelak <[email protected]>
Reviewed-by: Suraj Kandpal <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 10 ++++++++++
 drivers/gpu/drm/i915/display/intel_bios.h |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index 06a8dd7581bb8..9610b794bc147 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -2801,6 +2801,11 @@ static void print_ddi_port(const struct intel_bios_encoder_data *devdata)
 			    "Port %c supports dynamic DDI allocation in TCSS\n",
 			    port_name(port));
 
+	if (intel_bios_encoder_requests_vspeo(devdata))
+		drm_dbg_kms(display->drm,
+			    "Port %c requests vswing/pre-emphasis override\n",
+			    port_name(port));
+
 	hdmi_level_shift = intel_bios_hdmi_level_shift(devdata);
 	if (hdmi_level_shift >= 0) {
 		drm_dbg_kms(display->drm,
@@ -3829,6 +3834,11 @@ int intel_bios_hdmi_ddc_pin(const struct intel_bios_encoder_data *devdata)
 	return map_ddc_pin(devdata->display, devdata->child.ddc_pin);
 }
 
+bool intel_bios_encoder_requests_vspeo(const struct intel_bios_encoder_data *devdata)
+{
+	return devdata->display->vbt.version >= 218 && devdata->child.use_vbt_vswing;
+}
+
 bool intel_bios_encoder_supports_typec_usb(const struct intel_bios_encoder_data *devdata)
 {
 	return devdata->display->vbt.version >= 195 && devdata->child.dp_usb_type_c;
diff --git a/drivers/gpu/drm/i915/display/intel_bios.h b/drivers/gpu/drm/i915/display/intel_bios.h
index 75dff27b42289..7a50a272cd27d 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.h
+++ b/drivers/gpu/drm/i915/display/intel_bios.h
@@ -73,6 +73,7 @@ bool intel_bios_get_dsc_params(struct intel_encoder *encoder,
 const struct intel_bios_encoder_data *
 intel_bios_encoder_data_lookup(struct intel_display *display, enum port port);
 
+bool intel_bios_encoder_requests_vspeo(const struct intel_bios_encoder_data *devdata);
 bool intel_bios_encoder_supports_dvi(const struct intel_bios_encoder_data *devdata);
 bool intel_bios_encoder_supports_hdmi(const struct intel_bios_encoder_data *devdata);
 bool intel_bios_encoder_supports_dp(const struct intel_bios_encoder_data *devdata);
-- 
2.45.2