drivers/gpu/drm/i915/display/vlv_sideband.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/i915/display/vlv_sideband.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/i915/display/vlv_sideband.c
Extension
.c
Size
4488 bytes
Lines
175
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: MIT
/* Copyright © 2025 Intel Corporation */

#include <drm/drm_print.h>

#include "intel_display_core.h"
#include "intel_display_types.h"
#include "intel_dpio_phy.h"
#include "intel_parent.h"
#include "vlv_sideband.h"

void vlv_bunit_get(struct intel_display *display)
{
	intel_parent_vlv_iosf_get(display, BIT(VLV_IOSF_SB_BUNIT));
}

u32 vlv_bunit_read(struct intel_display *display, u32 reg)
{
	return intel_parent_vlv_iosf_read(display, VLV_IOSF_SB_BUNIT, reg);
}

void vlv_bunit_write(struct intel_display *display, u32 reg, u32 val)
{
	intel_parent_vlv_iosf_write(display, VLV_IOSF_SB_BUNIT, reg, val);
}

void vlv_bunit_put(struct intel_display *display)
{
	intel_parent_vlv_iosf_put(display, BIT(VLV_IOSF_SB_BUNIT));
}

void vlv_cck_get(struct intel_display *display)
{
	intel_parent_vlv_iosf_get(display, BIT(VLV_IOSF_SB_CCK));
}

u32 vlv_cck_read(struct intel_display *display, u32 reg)
{
	return intel_parent_vlv_iosf_read(display, VLV_IOSF_SB_CCK, reg);
}

void vlv_cck_write(struct intel_display *display, u32 reg, u32 val)
{
	intel_parent_vlv_iosf_write(display, VLV_IOSF_SB_CCK, reg, val);
}

void vlv_cck_put(struct intel_display *display)
{
	intel_parent_vlv_iosf_put(display, BIT(VLV_IOSF_SB_CCK));
}

void vlv_ccu_get(struct intel_display *display)
{
	intel_parent_vlv_iosf_get(display, BIT(VLV_IOSF_SB_CCU));
}

u32 vlv_ccu_read(struct intel_display *display, u32 reg)
{
	return intel_parent_vlv_iosf_read(display, VLV_IOSF_SB_CCU, reg);
}

void vlv_ccu_write(struct intel_display *display, u32 reg, u32 val)
{
	intel_parent_vlv_iosf_write(display, VLV_IOSF_SB_CCU, reg, val);
}

void vlv_ccu_put(struct intel_display *display)
{
	intel_parent_vlv_iosf_put(display, BIT(VLV_IOSF_SB_CCU));
}

void vlv_dpio_get(struct intel_display *display)
{
	intel_parent_vlv_iosf_get(display, BIT(VLV_IOSF_SB_DPIO) | BIT(VLV_IOSF_SB_DPIO_2));
}

static enum vlv_iosf_sb_unit vlv_dpio_phy_to_unit(struct intel_display *display,
						  enum dpio_phy phy)
{
	/*
	 * IOSF_PORT_DPIO: VLV x2 PHY (DP/HDMI B and C), CHV x1 PHY (DP/HDMI D)
	 * IOSF_PORT_DPIO_2: CHV x2 PHY (DP/HDMI B and C)
	 */
	if (display->platform.cherryview)
		return phy == DPIO_PHY0 ? VLV_IOSF_SB_DPIO_2 : VLV_IOSF_SB_DPIO;
	else
		return VLV_IOSF_SB_DPIO;
}

u32 vlv_dpio_read(struct intel_display *display, enum dpio_phy phy, int reg)

Annotation

Implementation Notes