Merge tag 'drm-intel-next-2023-03-07' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

Cross-subsystem Changes:
- MEI patches to fix suspend/resume issues with the i915's PXP. (Alexander)

Driver Changes:
- Registers helpers and clean-ups. (Lucas)
- PXP fixes and clean-ups. (Alan, Alexander)
- CDCLK related fixes and w/a (Chaitanya, Stanislav)
- Move display code to use RMW whenever possible (Andrzej)
- PSR fixes (Jouni, Ville)
- Implement async_flip mode per plane tracking (Andrzej)
- Remove pre-production Workarounds (Matt)
- HDMI related fixes (Ankit)
- LVDS cleanup (Ville)
- Watermark fixes and cleanups (Ville, Jani, Stanilav)
- DMC code related fixes, cleanups and improvements (Jani)
- Implement fb_dirty for PSR,FBC,DRRS fixes (Jouni)
- Initial DSB improvements targeting LUTs loading (Ville)
- HWMON related fixes (Ashutosh)
- PCI ID updates (Jonathan, Matt Roper)
- Fix leak in scatterlist (Matt Atwood)
- Fix eDP+DSI dual panel systems (Ville)
- Cast iomem to avoid sparese warnings (Jani)
- Set default backlight controller index (Jani)
- More MTL enabling (RK)
- Conversion of display dev_priv towards i915 (Nirmoy)
- Improvements in log/debug messages (Ville)
- Increase slice_height for DP VDSC (Suraj)
- VBT ports improvements (Ville)
- Fix platforms without Display (Imre)
- Other generic display code clean-ups (Ville, Jani, Rodrigo)
- Add RPL-U sub platform (Chaitanya)
- Add inverted backlight quirk for HP 14-r206nv (Mavroudis)
- Transcoder timing improvements (Ville)
- Track audio state per-transcoder (Ville)
- Error/underrun interrupt fixes (Ville)
- Update combo PHY init sequence (Matt Roper)
- Get HDR DPCD refresh timeout (Ville)
- Vblank improvements (Ville)
- DSS fixes and cleanups (Jani)
- PM code cleanup (Jani)
- Split display parts related to RPS (Jani)

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZAez4aekcob8fTeh@intel.com

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c
index 5a176bfb10a2..96967e21c94c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c
@@ -6,6 +6,7 @@
 #include "i915_drv.h"
 #include "i915_reg.h"
 #include "i915_trace.h"
+#include "intel_bios.h"
 #include "intel_de.h"
 #include "intel_display_types.h"
 #include "intel_dp_aux.h"
@@ -737,3 +738,37 @@ void intel_dp_aux_init(struct intel_dp *intel_dp)
 	intel_dp->aux.transfer = intel_dp_aux_transfer;
 	cpu_latency_qos_add_request(&intel_dp->pm_qos, PM_QOS_DEFAULT_VALUE);
 }
+
+static enum aux_ch default_aux_ch(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+
+	/* SKL has DDI E but no AUX E */
+	if (DISPLAY_VER(i915) == 9 && encoder->port == PORT_E)
+		return AUX_CH_A;
+
+	return (enum aux_ch)encoder->port;
+}
+
+enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *i915 = to_i915(encoder->base.dev);
+	enum aux_ch aux_ch;
+
+	aux_ch = intel_bios_dp_aux_ch(encoder->devdata);
+	if (aux_ch != AUX_CH_NONE) {
+		drm_dbg_kms(&i915->drm, "[ENCODER:%d:%s] using AUX %c (VBT)\n",
+			    encoder->base.base.id, encoder->base.name,
+			    aux_ch_name(aux_ch));
+		return aux_ch;
+	}
+
+	aux_ch = default_aux_ch(encoder);
+
+	drm_dbg_kms(&i915->drm,
+		    "[ENCODER:%d:%s] using AUX %c (platform default)\n",
+		    encoder->base.base.id, encoder->base.name,
+		    aux_ch_name(aux_ch));
+
+	return aux_ch;
+}