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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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bd4d1856f5
With users both in i915 core and display, struct drm_device is the common denominator for the VLV IOSF SB users. Also use drm_device for the helpers on the display side to keep the static inlines as simple as possible. We can drop a number of dependencies on i915_drv.h with this. v2,v3: Rebase Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://lore.kernel.org/r/c1d013ed88ce2e3e5bdc15ce3bf01a3960b1e817.1747061743.git.jani.nikula@intel.com Signed-off-by: Jani Nikula <jani.nikula@intel.com>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
// SPDX-License-Identifier: MIT
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/* Copyright © 2025 Intel Corporation */
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#include <drm/drm_print.h>
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#include "intel_display_core.h"
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#include "intel_display_types.h"
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#include "intel_dpio_phy.h"
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#include "vlv_sideband.h"
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static enum vlv_iosf_sb_unit vlv_dpio_phy_to_unit(struct intel_display *display,
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enum dpio_phy phy)
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{
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/*
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* IOSF_PORT_DPIO: VLV x2 PHY (DP/HDMI B and C), CHV x1 PHY (DP/HDMI D)
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* IOSF_PORT_DPIO_2: CHV x2 PHY (DP/HDMI B and C)
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*/
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if (display->platform.cherryview)
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return phy == DPIO_PHY0 ? VLV_IOSF_SB_DPIO_2 : VLV_IOSF_SB_DPIO;
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else
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return VLV_IOSF_SB_DPIO;
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}
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u32 vlv_dpio_read(struct drm_device *drm, enum dpio_phy phy, int reg)
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{
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struct intel_display *display = to_intel_display(drm);
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enum vlv_iosf_sb_unit unit = vlv_dpio_phy_to_unit(display, phy);
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u32 val;
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val = vlv_iosf_sb_read(drm, unit, reg);
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/*
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* FIXME: There might be some registers where all 1's is a valid value,
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* so ideally we should check the register offset instead...
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*/
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drm_WARN(display->drm, val == 0xffffffff,
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"DPIO PHY%d read reg 0x%x == 0x%x\n",
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phy, reg, val);
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return val;
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}
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void vlv_dpio_write(struct drm_device *drm,
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enum dpio_phy phy, int reg, u32 val)
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{
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struct intel_display *display = to_intel_display(drm);
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enum vlv_iosf_sb_unit unit = vlv_dpio_phy_to_unit(display, phy);
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vlv_iosf_sb_write(drm, unit, reg, val);
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}
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