diff --git a/drivers/gpu/drm/i915/Makefile.header-test b/drivers/gpu/drm/i915/Makefile.header-test
index 702e3a7ade4c..325071da0ff7 100644
--- a/drivers/gpu/drm/i915/Makefile.header-test
+++ b/drivers/gpu/drm/i915/Makefile.header-test
@@ -30,6 +30,7 @@ header_test := \
 	intel_pipe_crc.h \
 	intel_pm.h \
 	intel_psr.h \
+	intel_sideband.h \
 	intel_sdvo.h \
 	intel_sprite.h \
 	intel_tv.h \
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 3e1922e2185c..bc94b778da6f 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -42,6 +42,7 @@
 #include "intel_hdmi.h"
 #include "intel_pm.h"
 #include "intel_psr.h"
+#include "intel_sideband.h"
 
 static inline struct drm_i915_private *node_to_i915(struct drm_info_node *node)
 {
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ca1b35d8faca..c18b28271bfd 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -541,11 +541,6 @@ enum intel_pch {
 	PCH_ICP,	/* Ice Lake PCH */
 };
 
-enum intel_sbi_destination {
-	SBI_ICLK,
-	SBI_MPHY,
-};
-
 #define QUIRK_LVDS_SSC_DISABLE (1<<1)
 #define QUIRK_INVERT_BRIGHTNESS (1<<2)
 #define QUIRK_BACKLIGHT_PRESENT (1<<3)
@@ -3435,121 +3430,6 @@ int sandybridge_pcode_write_timeout(struct drm_i915_private *dev_priv, u32 mbox,
 int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
 		      u32 reply_mask, u32 reply, int timeout_base_ms);
 
-/* intel_sideband.c */
-
-enum {
-	VLV_IOSF_SB_BUNIT,
-	VLV_IOSF_SB_CCK,
-	VLV_IOSF_SB_CCU,
-	VLV_IOSF_SB_DPIO,
-	VLV_IOSF_SB_FLISDSI,
-	VLV_IOSF_SB_GPIO,
-	VLV_IOSF_SB_NC,
-	VLV_IOSF_SB_PUNIT,
-};
-
-void vlv_iosf_sb_get(struct drm_i915_private *i915, unsigned long ports);
-u32 vlv_iosf_sb_read(struct drm_i915_private *i915, u8 port, u32 reg);
-void vlv_iosf_sb_write(struct drm_i915_private *i915,
-		       u8 port, u32 reg, u32 val);
-void vlv_iosf_sb_put(struct drm_i915_private *i915, unsigned long ports);
-
-static inline void vlv_bunit_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_BUNIT));
-}
-
-u32 vlv_bunit_read(struct drm_i915_private *i915, u32 reg);
-void vlv_bunit_write(struct drm_i915_private *i915, u32 reg, u32 val);
-
-static inline void vlv_bunit_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_BUNIT));
-}
-
-static inline void vlv_cck_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_CCK));
-}
-
-u32 vlv_cck_read(struct drm_i915_private *i915, u32 reg);
-void vlv_cck_write(struct drm_i915_private *i915, u32 reg, u32 val);
-
-static inline void vlv_cck_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_CCK));
-}
-
-static inline void vlv_ccu_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_CCU));
-}
-
-u32 vlv_ccu_read(struct drm_i915_private *i915, u32 reg);
-void vlv_ccu_write(struct drm_i915_private *i915, u32 reg, u32 val);
-
-static inline void vlv_ccu_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_CCU));
-}
-
-static inline void vlv_dpio_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_DPIO));
-}
-
-u32 vlv_dpio_read(struct drm_i915_private *i915, enum pipe pipe, int reg);
-void vlv_dpio_write(struct drm_i915_private *i915,
-		    enum pipe pipe, int reg, u32 val);
-
-static inline void vlv_dpio_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_DPIO));
-}
-
-static inline void vlv_flisdsi_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_FLISDSI));
-}
-
-u32 vlv_flisdsi_read(struct drm_i915_private *i915, u32 reg);
-void vlv_flisdsi_write(struct drm_i915_private *i915, u32 reg, u32 val);
-
-static inline void vlv_flisdsi_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_FLISDSI));
-}
-
-static inline void vlv_nc_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_NC));
-}
-
-u32 vlv_nc_read(struct drm_i915_private *i915, u8 addr);
-
-static inline void vlv_nc_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_NC));
-}
-
-static inline void vlv_punit_get(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_PUNIT));
-}
-
-u32 vlv_punit_read(struct drm_i915_private *i915, u32 addr);
-int vlv_punit_write(struct drm_i915_private *i915, u32 addr, u32 val);
-
-static inline void vlv_punit_put(struct drm_i915_private *i915)
-{
-	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_PUNIT));
-}
-
-u32 intel_sbi_read(struct drm_i915_private *dev_priv, u16 reg,
-		   enum intel_sbi_destination destination);
-void intel_sbi_write(struct drm_i915_private *dev_priv, u16 reg, u32 value,
-		     enum intel_sbi_destination destination);
-
 /* intel_dpio_phy.c */
 void bxt_port_to_phy_channel(struct drm_i915_private *dev_priv, enum port port,
 			     enum dpio_phy *phy, enum dpio_channel *ch);
diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index 0952d6a70e1f..9bb3a15e4683 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -29,7 +29,9 @@
 #include <linux/module.h>
 #include <linux/stat.h>
 #include <linux/sysfs.h>
+
 #include "intel_drv.h"
+#include "intel_sideband.h"
 #include "i915_drv.h"
 
 static inline struct drm_i915_private *kdev_minor_to_i915(struct device *kdev)
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c
index 2bc5d3227a24..cf9c916e8d49 100644
--- a/drivers/gpu/drm/i915/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/intel_cdclk.c
@@ -23,6 +23,7 @@
 
 #include "intel_cdclk.h"
 #include "intel_drv.h"
+#include "intel_sideband.h"
 
 /**
  * DOC: CDCLK / RAWCLK
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 13531ce60081..5453dbecdcb8 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -66,6 +66,7 @@
 #include "intel_pm.h"
 #include "intel_psr.h"
 #include "intel_sdvo.h"
+#include "intel_sideband.h"
 #include "intel_sprite.h"
 #include "intel_tv.h"
 
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 4fc25dcc97d4..08d92570f17f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -31,6 +31,7 @@
 #include <linux/reboot.h>
 #include <linux/slab.h>
 #include <linux/types.h>
+
 #include <asm/byteorder.h>
 
 #include <drm/drm_atomic_helper.h>
@@ -53,6 +54,7 @@
 #include "intel_lvds.h"
 #include "intel_panel.h"
 #include "intel_psr.h"
+#include "intel_sideband.h"
 
 #define DP_DPRX_ESI_LEN 14
 
diff --git a/drivers/gpu/drm/i915/intel_dpio_phy.c b/drivers/gpu/drm/i915/intel_dpio_phy.c
index c784f3daaf51..d80887b5e234 100644
--- a/drivers/gpu/drm/i915/intel_dpio_phy.c
+++ b/drivers/gpu/drm/i915/intel_dpio_phy.c
@@ -23,6 +23,7 @@
 
 #include "intel_dp.h"
 #include "intel_drv.h"
+#include "intel_sideband.h"
 
 /**
  * DOC: DPIO
diff --git a/drivers/gpu/drm/i915/intel_dsi_vbt.c b/drivers/gpu/drm/i915/intel_dsi_vbt.c
index 2304488f2d35..fbed9064ac7e 100644
--- a/drivers/gpu/drm/i915/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_vbt.c
@@ -24,18 +24,23 @@
  *
  */
 
-#include <drm/drm_crtc.h>
-#include <drm/drm_edid.h>
-#include <drm/i915_drm.h>
 #include <linux/gpio/consumer.h>
 #include <linux/mfd/intel_soc_pmic.h>
 #include <linux/slab.h>
-#include <video/mipi_display.h>
+
 #include <asm/intel-mid.h>
 #include <asm/unaligned.h>
+
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include <drm/i915_drm.h>
+
+#include <video/mipi_display.h>
+
 #include "i915_drv.h"
 #include "intel_drv.h"
 #include "intel_dsi.h"
+#include "intel_sideband.h"
 
 #define MIPI_TRANSFER_MODE_SHIFT	0
 #define MIPI_VIRTUAL_CHANNEL_SHIFT	1
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 8b72365f9309..d2b3b32ea159 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -50,6 +50,7 @@
 #include "intel_lspcon.h"
 #include "intel_sdvo.h"
 #include "intel_panel.h"
+#include "intel_sideband.h"
 
 static struct drm_device *intel_hdmi_to_dev(struct intel_hdmi *intel_hdmi)
 {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5d4a793a1988..4b763c28222f 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -38,6 +38,7 @@
 #include "intel_fbc.h"
 #include "intel_pm.h"
 #include "intel_sprite.h"
+#include "intel_sideband.h"
 #include "../../../platform/x86/intel_ips.h"
 
 /**
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index a80ff35f6c81..166f162a7d51 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -37,6 +37,7 @@
 #include "intel_csr.h"
 #include "intel_dp.h"
 #include "intel_drv.h"
+#include "intel_sideband.h"
 
 /**
  * DOC: runtime pm
diff --git a/drivers/gpu/drm/i915/intel_sideband.c b/drivers/gpu/drm/i915/intel_sideband.c
index 457b8cad5494..5c3ae5185a01 100644
--- a/drivers/gpu/drm/i915/intel_sideband.c
+++ b/drivers/gpu/drm/i915/intel_sideband.c
@@ -24,6 +24,8 @@
 
 #include <asm/iosf_mbi.h>
 
+#include "intel_sideband.h"
+
 #include "i915_drv.h"
 #include "intel_drv.h"
 
diff --git a/drivers/gpu/drm/i915/intel_sideband.h b/drivers/gpu/drm/i915/intel_sideband.h
new file mode 100644
index 000000000000..9d36bdc17955
--- /dev/null
+++ b/drivers/gpu/drm/i915/intel_sideband.h
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: MIT */
+
+#ifndef _INTEL_SIDEBAND_H_
+#define _INTEL_SIDEBAND_H_
+
+#include <linux/bitops.h>
+#include <linux/types.h>
+
+struct drm_i915_private;
+enum pipe;
+
+enum intel_sbi_destination {
+	SBI_ICLK,
+	SBI_MPHY,
+};
+
+enum {
+	VLV_IOSF_SB_BUNIT,
+	VLV_IOSF_SB_CCK,
+	VLV_IOSF_SB_CCU,
+	VLV_IOSF_SB_DPIO,
+	VLV_IOSF_SB_FLISDSI,
+	VLV_IOSF_SB_GPIO,
+	VLV_IOSF_SB_NC,
+	VLV_IOSF_SB_PUNIT,
+};
+
+void vlv_iosf_sb_get(struct drm_i915_private *i915, unsigned long ports);
+u32 vlv_iosf_sb_read(struct drm_i915_private *i915, u8 port, u32 reg);
+void vlv_iosf_sb_write(struct drm_i915_private *i915,
+		       u8 port, u32 reg, u32 val);
+void vlv_iosf_sb_put(struct drm_i915_private *i915, unsigned long ports);
+
+static inline void vlv_bunit_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_BUNIT));
+}
+
+u32 vlv_bunit_read(struct drm_i915_private *i915, u32 reg);
+void vlv_bunit_write(struct drm_i915_private *i915, u32 reg, u32 val);
+
+static inline void vlv_bunit_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_BUNIT));
+}
+
+static inline void vlv_cck_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_CCK));
+}
+
+u32 vlv_cck_read(struct drm_i915_private *i915, u32 reg);
+void vlv_cck_write(struct drm_i915_private *i915, u32 reg, u32 val);
+
+static inline void vlv_cck_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_CCK));
+}
+
+static inline void vlv_ccu_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_CCU));
+}
+
+u32 vlv_ccu_read(struct drm_i915_private *i915, u32 reg);
+void vlv_ccu_write(struct drm_i915_private *i915, u32 reg, u32 val);
+
+static inline void vlv_ccu_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_CCU));
+}
+
+static inline void vlv_dpio_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_DPIO));
+}
+
+u32 vlv_dpio_read(struct drm_i915_private *i915, enum pipe pipe, int reg);
+void vlv_dpio_write(struct drm_i915_private *i915,
+		    enum pipe pipe, int reg, u32 val);
+
+static inline void vlv_dpio_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_DPIO));
+}
+
+static inline void vlv_flisdsi_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_FLISDSI));
+}
+
+u32 vlv_flisdsi_read(struct drm_i915_private *i915, u32 reg);
+void vlv_flisdsi_write(struct drm_i915_private *i915, u32 reg, u32 val);
+
+static inline void vlv_flisdsi_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_FLISDSI));
+}
+
+static inline void vlv_nc_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_NC));
+}
+
+u32 vlv_nc_read(struct drm_i915_private *i915, u8 addr);
+
+static inline void vlv_nc_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_NC));
+}
+
+static inline void vlv_punit_get(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_get(i915, BIT(VLV_IOSF_SB_PUNIT));
+}
+
+u32 vlv_punit_read(struct drm_i915_private *i915, u32 addr);
+int vlv_punit_write(struct drm_i915_private *i915, u32 addr, u32 val);
+
+static inline void vlv_punit_put(struct drm_i915_private *i915)
+{
+	vlv_iosf_sb_put(i915, BIT(VLV_IOSF_SB_PUNIT));
+}
+
+u32 intel_sbi_read(struct drm_i915_private *i915, u16 reg,
+		   enum intel_sbi_destination destination);
+void intel_sbi_write(struct drm_i915_private *i915, u16 reg, u32 value,
+		     enum intel_sbi_destination destination);
+
+#endif /* _INTEL_SIDEBAND_H */
diff --git a/drivers/gpu/drm/i915/vlv_dsi.c b/drivers/gpu/drm/i915/vlv_dsi.c
index dc1839bfde3e..b4c658334d04 100644
--- a/drivers/gpu/drm/i915/vlv_dsi.c
+++ b/drivers/gpu/drm/i915/vlv_dsi.c
@@ -30,13 +30,13 @@
 #include <drm/drm_crtc.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_mipi_dsi.h>
-#include <drm/i915_drm.h>
 
 #include "i915_drv.h"
 #include "intel_connector.h"
 #include "intel_drv.h"
 #include "intel_dsi.h"
 #include "intel_panel.h"
+#include "intel_sideband.h"
 
 /* return pixels in terms of txbyteclkhs */
 static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
diff --git a/drivers/gpu/drm/i915/vlv_dsi_pll.c b/drivers/gpu/drm/i915/vlv_dsi_pll.c
index 25b811174f5c..99cc3e2e9c2c 100644
--- a/drivers/gpu/drm/i915/vlv_dsi_pll.c
+++ b/drivers/gpu/drm/i915/vlv_dsi_pll.c
@@ -26,9 +26,11 @@
  */
 
 #include <linux/kernel.h>
-#include "intel_drv.h"
+
 #include "i915_drv.h"
+#include "intel_drv.h"
 #include "intel_dsi.h"
+#include "intel_sideband.h"
 
 static const u16 lfsr_converts[] = {
 	426, 469, 234, 373, 442, 221, 110, 311, 411,		/* 62 - 70 */
