projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c8b75bca EA |
1 | /* |
| 2 | * Copyright (C) 2015 Broadcom | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or modify | |
| 5 | * it under the terms of the GNU General Public License version 2 as | |
| 6 | * published by the Free Software Foundation. | |
| 7 | */ | |
| 8 | ||
| 9 | /** | |
| 10 | * DOC: VC4 HVS module. | |
| 11 | * | |
| 12 | * The HVS is the piece of hardware that does translation, scaling, | |
| 13 | * colorspace conversion, and compositing of pixels stored in | |
| 14 | * framebuffers into a FIFO of pixels going out to the Pixel Valve | |
| 15 | * (CRTC). It operates at the system clock rate (the system audio | |
| 16 | * clock gate, specifically), which is much higher than the pixel | |
| 17 | * clock rate. | |
| 18 | * | |
| 19 | * There is a single global HVS, with multiple output FIFOs that can | |
| 20 | * be consumed by the PVs. This file just manages the resources for | |
| 21 | * the HVS, while the vc4_crtc.c code actually drives HVS setup for | |
| 22 | * each CRTC. | |
| 23 | */ | |
| 24 | ||
| 25 | #include "linux/component.h" | |
| 26 | #include "vc4_drv.h" | |
| 27 | #include "vc4_regs.h" | |
| 28 | ||
| 29 | #define HVS_REG(reg) { reg, #reg } | |
| 30 | static const struct { | |
| 31 | u32 reg; | |
| 32 | const char *name; | |
| 33 | } hvs_regs[] = { | |
| 34 | HVS_REG(SCALER_DISPCTRL), | |
| 35 | HVS_REG(SCALER_DISPSTAT), | |
| 36 | HVS_REG(SCALER_DISPID), | |
| 37 | HVS_REG(SCALER_DISPECTRL), | |
| 38 | HVS_REG(SCALER_DISPPROF), | |
| 39 | HVS_REG(SCALER_DISPDITHER), | |
| 40 | HVS_REG(SCALER_DISPEOLN), | |
| 41 | HVS_REG(SCALER_DISPLIST0), | |
| 42 | HVS_REG(SCALER_DISPLIST1), | |
| 43 | HVS_REG(SCALER_DISPLIST2), | |
| 44 | HVS_REG(SCALER_DISPLSTAT), | |
| 45 | HVS_REG(SCALER_DISPLACT0), | |
| 46 | HVS_REG(SCALER_DISPLACT1), | |
| 47 | HVS_REG(SCALER_DISPLACT2), | |
| 48 | HVS_REG(SCALER_DISPCTRL0), | |
| 49 | HVS_REG(SCALER_DISPBKGND0), | |
| 50 | HVS_REG(SCALER_DISPSTAT0), | |
| 51 | HVS_REG(SCALER_DISPBASE0), | |
| 52 | HVS_REG(SCALER_DISPCTRL1), | |
| 53 | HVS_REG(SCALER_DISPBKGND1), | |
| 54 | HVS_REG(SCALER_DISPSTAT1), | |
| 55 | HVS_REG(SCALER_DISPBASE1), | |
| 56 | HVS_REG(SCALER_DISPCTRL2), | |
| 57 | HVS_REG(SCALER_DISPBKGND2), | |
| 58 | HVS_REG(SCALER_DISPSTAT2), | |
| 59 | HVS_REG(SCALER_DISPBASE2), | |
| 60 | HVS_REG(SCALER_DISPALPHA2), | |
| 61 | }; | |
| 62 | ||
| 63 | void vc4_hvs_dump_state(struct drm_device *dev) | |
| 64 | { | |
| 65 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
| 66 | int i; | |
| 67 | ||
| 68 | for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) { | |
| 69 | DRM_INFO("0x%04x (%s): 0x%08x\n", | |
| 70 | hvs_regs[i].reg, hvs_regs[i].name, | |
| 71 | HVS_READ(hvs_regs[i].reg)); | |
| 72 | } | |
| 73 | ||
| 74 | DRM_INFO("HVS ctx:\n"); | |
| 75 | for (i = 0; i < 64; i += 4) { | |
| 76 | DRM_INFO("0x%08x (%s): 0x%08x 0x%08x 0x%08x 0x%08x\n", | |
| 77 | i * 4, i < HVS_BOOTLOADER_DLIST_END ? "B" : "D", | |
| 36f4f69a EA |
78 | readl((u32 __iomem *)vc4->hvs->dlist + i + 0), |
| 79 | readl((u32 __iomem *)vc4->hvs->dlist + i + 1), | |
| 80 | readl((u32 __iomem *)vc4->hvs->dlist + i + 2), | |
| 81 | readl((u32 __iomem *)vc4->hvs->dlist + i + 3)); | |
| c8b75bca EA |
82 | } |
| 83 | } | |
| 84 | ||
| 85 | #ifdef CONFIG_DEBUG_FS | |
| 86 | int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused) | |
| 87 | { | |
| 88 | struct drm_info_node *node = (struct drm_info_node *)m->private; | |
| 89 | struct drm_device *dev = node->minor->dev; | |
| 90 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
| 91 | int i; | |
| 92 | ||
| 93 | for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) { | |
| 94 | seq_printf(m, "%s (0x%04x): 0x%08x\n", | |
| 95 | hvs_regs[i].name, hvs_regs[i].reg, | |
| 96 | HVS_READ(hvs_regs[i].reg)); | |
| 97 | } | |
| 98 | ||
| 99 | return 0; | |
| 100 | } | |
| 101 | #endif | |
| 102 | ||
| 103 | static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) | |
| 104 | { | |
| 105 | struct platform_device *pdev = to_platform_device(dev); | |
| 106 | struct drm_device *drm = dev_get_drvdata(master); | |
| 107 | struct vc4_dev *vc4 = drm->dev_private; | |
| 108 | struct vc4_hvs *hvs = NULL; | |
| 109 | ||
| 110 | hvs = devm_kzalloc(&pdev->dev, sizeof(*hvs), GFP_KERNEL); | |
| 111 | if (!hvs) | |
| 112 | return -ENOMEM; | |
| 113 | ||
| 114 | hvs->pdev = pdev; | |
| 115 | ||
| 116 | hvs->regs = vc4_ioremap_regs(pdev, 0); | |
| 117 | if (IS_ERR(hvs->regs)) | |
| 118 | return PTR_ERR(hvs->regs); | |
| 119 | ||
| 120 | hvs->dlist = hvs->regs + SCALER_DLIST_START; | |
| 121 | ||
| 122 | vc4->hvs = hvs; | |
| 123 | return 0; | |
| 124 | } | |
| 125 | ||
| 126 | static void vc4_hvs_unbind(struct device *dev, struct device *master, | |
| 127 | void *data) | |
| 128 | { | |
| 129 | struct drm_device *drm = dev_get_drvdata(master); | |
| 130 | struct vc4_dev *vc4 = drm->dev_private; | |
| 131 | ||
| 132 | vc4->hvs = NULL; | |
| 133 | } | |
| 134 | ||
| 135 | static const struct component_ops vc4_hvs_ops = { | |
| 136 | .bind = vc4_hvs_bind, | |
| 137 | .unbind = vc4_hvs_unbind, | |
| 138 | }; | |
| 139 | ||
| 140 | static int vc4_hvs_dev_probe(struct platform_device *pdev) | |
| 141 | { | |
| 142 | return component_add(&pdev->dev, &vc4_hvs_ops); | |
| 143 | } | |
| 144 | ||
| 145 | static int vc4_hvs_dev_remove(struct platform_device *pdev) | |
| 146 | { | |
| 147 | component_del(&pdev->dev, &vc4_hvs_ops); | |
| 148 | return 0; | |
| 149 | } | |
| 150 | ||
| 151 | static const struct of_device_id vc4_hvs_dt_match[] = { | |
| 152 | { .compatible = "brcm,bcm2835-hvs" }, | |
| 153 | {} | |
| 154 | }; | |
| 155 | ||
| 156 | struct platform_driver vc4_hvs_driver = { | |
| 157 | .probe = vc4_hvs_dev_probe, | |
| 158 | .remove = vc4_hvs_dev_remove, | |
| 159 | .driver = { | |
| 160 | .name = "vc4_hvs", | |
| 161 | .of_match_table = vc4_hvs_dt_match, | |
| 162 | }, | |
| 163 | }; |