18393253bSJani Nikula // SPDX-License-Identifier: MIT 28393253bSJani Nikula /* Copyright © 2025 Intel Corporation */ 38393253bSJani Nikula 4*bd4d1856SJani Nikula #include <drm/drm_print.h> 5*bd4d1856SJani Nikula 6*bd4d1856SJani Nikula #include "intel_display_core.h" 7*bd4d1856SJani Nikula #include "intel_display_types.h" 88393253bSJani Nikula #include "intel_dpio_phy.h" 98393253bSJani Nikula #include "vlv_sideband.h" 108393253bSJani Nikula 11*bd4d1856SJani Nikula static enum vlv_iosf_sb_unit vlv_dpio_phy_to_unit(struct intel_display *display, 128393253bSJani Nikula enum dpio_phy phy) 138393253bSJani Nikula { 148393253bSJani Nikula /* 158393253bSJani Nikula * IOSF_PORT_DPIO: VLV x2 PHY (DP/HDMI B and C), CHV x1 PHY (DP/HDMI D) 168393253bSJani Nikula * IOSF_PORT_DPIO_2: CHV x2 PHY (DP/HDMI B and C) 178393253bSJani Nikula */ 18*bd4d1856SJani Nikula if (display->platform.cherryview) 198393253bSJani Nikula return phy == DPIO_PHY0 ? VLV_IOSF_SB_DPIO_2 : VLV_IOSF_SB_DPIO; 208393253bSJani Nikula else 218393253bSJani Nikula return VLV_IOSF_SB_DPIO; 228393253bSJani Nikula } 238393253bSJani Nikula 24*bd4d1856SJani Nikula u32 vlv_dpio_read(struct drm_device *drm, enum dpio_phy phy, int reg) 258393253bSJani Nikula { 26*bd4d1856SJani Nikula struct intel_display *display = to_intel_display(drm); 27*bd4d1856SJani Nikula enum vlv_iosf_sb_unit unit = vlv_dpio_phy_to_unit(display, phy); 288393253bSJani Nikula u32 val; 298393253bSJani Nikula 30*bd4d1856SJani Nikula val = vlv_iosf_sb_read(drm, unit, reg); 318393253bSJani Nikula 328393253bSJani Nikula /* 338393253bSJani Nikula * FIXME: There might be some registers where all 1's is a valid value, 348393253bSJani Nikula * so ideally we should check the register offset instead... 358393253bSJani Nikula */ 36*bd4d1856SJani Nikula drm_WARN(display->drm, val == 0xffffffff, 378393253bSJani Nikula "DPIO PHY%d read reg 0x%x == 0x%x\n", 388393253bSJani Nikula phy, reg, val); 398393253bSJani Nikula 408393253bSJani Nikula return val; 418393253bSJani Nikula } 428393253bSJani Nikula 43*bd4d1856SJani Nikula void vlv_dpio_write(struct drm_device *drm, 448393253bSJani Nikula enum dpio_phy phy, int reg, u32 val) 458393253bSJani Nikula { 46*bd4d1856SJani Nikula struct intel_display *display = to_intel_display(drm); 47*bd4d1856SJani Nikula enum vlv_iosf_sb_unit unit = vlv_dpio_phy_to_unit(display, phy); 488393253bSJani Nikula 49*bd4d1856SJani Nikula vlv_iosf_sb_write(drm, unit, reg, val); 508393253bSJani Nikula } 51