Merge tag 'drm-intel-next-2025-06-18' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next

drm/i915 feature pull for v6.17:

Features and functionality:
- Add support for DSC fractional link bpp on DP MST (Imre)
- Add support for simultaneous Panel Replay and Adaptive Sync (Jouni)
- Add support for PTL+ double buffered LUT registers (Chaitanya, Ville)
- Add PIPEDMC event handling in preparation for flip queue (Ville)

Refactoring and cleanups:
- Rename lots of DPLL interfaces to unify them (Suraj)
- Allocate struct intel_display dynamically (Jani)
- Abstract VLV IOSF sideband better (Jani)
- Use str_true_false() helper (Yumeng Fang)
- Refactor DSB code in preparation for flip queue (Ville)
- Use drm_modeset_lock_assert_held() instead of open coding (Luca)
- Remove unused arg from skl_scaler_get_filter_select() (Luca)
- Split out a separate display register header (Jani)
- Abstract DRAM detection better (Jani)
- Convert LPT/WPT SBI sideband to struct intel_display (Jani)

Fixes:
- Fix DSI HS command dispatch with forced pipeline flush (Gareth Yu)
- Fix BMG and LNL+ DP adaptive sync SDP programming (Ankit)
- Fix error path for xe display workqueue allocation (Haoxiang Li)
- Disable DP AUX access probe where not required (Imre)
- Fix DKL PHY access if the port is invalid (Luca)
- Fix PSR2_SU_STATUS access on ADL+ (Jouni)
- Add sanity checks for porch and sync on BXT/GLK DSI (Ville)

DRM core changes:
- Change AUX DPCD access probe address (Imre)
- Refactor EDID quirks, amd make them available to drivers (Imre)
- Add quirk for DPCD access probe (Imre)
- Add DPCD definitions for Panel Replay capabilities (Jouni)

Merges:
- Backmerges to sync with v6.15-rcs and v6.16-rc1 (Jani)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/fff9f231850ed410bd81b53de43eff0b98240d31@intel.com

1 files changed, 90 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_sbi.c b/drivers/gpu/drm/i915/display/intel_sbi.c
new file mode 100644
index 000000000000..dfcff924f0ed
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sbi.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2013-2021 Intel Corporation
+ *
+ * LPT/WPT IOSF sideband.
+ */
+
+#include <drm/drm_print.h>
+
+#include "intel_de.h"
+#include "intel_display_core.h"
+#include "intel_sbi.h"
+#include "intel_sbi_regs.h"
+
+/* SBI access */
+static int intel_sbi_rw(struct intel_display *display, u16 reg,
+			enum intel_sbi_destination destination,
+			u32 *val, bool is_read)
+{
+	u32 cmd;
+
+	lockdep_assert_held(&display->sbi.lock);
+
+	if (intel_de_wait_fw(display, SBI_CTL_STAT, SBI_STATUS_MASK, SBI_STATUS_READY, 100, NULL)) {
+		drm_err(display->drm, "timeout waiting for SBI to become ready\n");
+		return -EBUSY;
+	}
+
+	intel_de_write_fw(display, SBI_ADDR, SBI_ADDR_VALUE(reg));
+	intel_de_write_fw(display, SBI_DATA, is_read ? 0 : *val);
+
+	if (destination == SBI_ICLK)
+		cmd = SBI_CTL_DEST_ICLK | SBI_CTL_OP_CRRD;
+	else
+		cmd = SBI_CTL_DEST_MPHY | SBI_CTL_OP_IORD;
+	if (!is_read)
+		cmd |= SBI_CTL_OP_WR;
+	intel_de_write_fw(display, SBI_CTL_STAT, cmd | SBI_STATUS_BUSY);
+
+	if (intel_de_wait_fw(display, SBI_CTL_STAT, SBI_STATUS_MASK, SBI_STATUS_READY, 100, &cmd)) {
+		drm_err(display->drm, "timeout waiting for SBI to complete read\n");
+		return -ETIMEDOUT;
+	}
+
+	if (cmd & SBI_RESPONSE_FAIL) {
+		drm_err(display->drm, "error during SBI read of reg %x\n", reg);
+		return -ENXIO;
+	}
+
+	if (is_read)
+		*val = intel_de_read_fw(display, SBI_DATA);
+
+	return 0;
+}
+
+void intel_sbi_lock(struct intel_display *display)
+{
+	mutex_lock(&display->sbi.lock);
+}
+
+void intel_sbi_unlock(struct intel_display *display)
+{
+	mutex_unlock(&display->sbi.lock);
+}
+
+u32 intel_sbi_read(struct intel_display *display, u16 reg,
+		   enum intel_sbi_destination destination)
+{
+	u32 result = 0;
+
+	intel_sbi_rw(display, reg, destination, &result, true);
+
+	return result;
+}
+
+void intel_sbi_write(struct intel_display *display, u16 reg, u32 value,
+		     enum intel_sbi_destination destination)
+{
+	intel_sbi_rw(display, reg, destination, &value, false);
+}
+
+void intel_sbi_init(struct intel_display *display)
+{
+	mutex_init(&display->sbi.lock);
+}
+
+void intel_sbi_fini(struct intel_display *display)
+{
+	mutex_destroy(&display->sbi.lock);
+}