diff options
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_hvs.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hvs.c | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c new file mode 100644 index 000000000000..ab1673f672a4 --- /dev/null +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -0,0 +1,163 @@ +/* + * Copyright (C) 2015 Broadcom + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/** + * DOC: VC4 HVS module. + * + * The HVS is the piece of hardware that does translation, scaling, + * colorspace conversion, and compositing of pixels stored in + * framebuffers into a FIFO of pixels going out to the Pixel Valve + * (CRTC). It operates at the system clock rate (the system audio + * clock gate, specifically), which is much higher than the pixel + * clock rate. + * + * There is a single global HVS, with multiple output FIFOs that can + * be consumed by the PVs. This file just manages the resources for + * the HVS, while the vc4_crtc.c code actually drives HVS setup for + * each CRTC. + */ + +#include "linux/component.h" +#include "vc4_drv.h" +#include "vc4_regs.h" + +#define HVS_REG(reg) { reg, #reg } +static const struct { + u32 reg; + const char *name; +} hvs_regs[] = { + HVS_REG(SCALER_DISPCTRL), + HVS_REG(SCALER_DISPSTAT), + HVS_REG(SCALER_DISPID), + HVS_REG(SCALER_DISPECTRL), + HVS_REG(SCALER_DISPPROF), + HVS_REG(SCALER_DISPDITHER), + HVS_REG(SCALER_DISPEOLN), + HVS_REG(SCALER_DISPLIST0), + HVS_REG(SCALER_DISPLIST1), + HVS_REG(SCALER_DISPLIST2), + HVS_REG(SCALER_DISPLSTAT), + HVS_REG(SCALER_DISPLACT0), + HVS_REG(SCALER_DISPLACT1), + HVS_REG(SCALER_DISPLACT2), + HVS_REG(SCALER_DISPCTRL0), + HVS_REG(SCALER_DISPBKGND0), + HVS_REG(SCALER_DISPSTAT0), + HVS_REG(SCALER_DISPBASE0), + HVS_REG(SCALER_DISPCTRL1), + HVS_REG(SCALER_DISPBKGND1), + HVS_REG(SCALER_DISPSTAT1), + HVS_REG(SCALER_DISPBASE1), + HVS_REG(SCALER_DISPCTRL2), + HVS_REG(SCALER_DISPBKGND2), + HVS_REG(SCALER_DISPSTAT2), + HVS_REG(SCALER_DISPBASE2), + HVS_REG(SCALER_DISPALPHA2), +}; + +void vc4_hvs_dump_state(struct drm_device *dev) +{ + struct vc4_dev *vc4 = to_vc4_dev(dev); + int i; + + for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) { + DRM_INFO("0x%04x (%s): 0x%08x\n", + hvs_regs[i].reg, hvs_regs[i].name, + HVS_READ(hvs_regs[i].reg)); + } + + DRM_INFO("HVS ctx:\n"); + for (i = 0; i < 64; i += 4) { + DRM_INFO("0x%08x (%s): 0x%08x 0x%08x 0x%08x 0x%08x\n", + i * 4, i < HVS_BOOTLOADER_DLIST_END ? "B" : "D", + ((uint32_t *)vc4->hvs->dlist)[i + 0], + ((uint32_t *)vc4->hvs->dlist)[i + 1], + ((uint32_t *)vc4->hvs->dlist)[i + 2], + ((uint32_t *)vc4->hvs->dlist)[i + 3]); + } +} + +#ifdef CONFIG_DEBUG_FS +int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused) +{ + struct drm_info_node *node = (struct drm_info_node *)m->private; + struct drm_device *dev = node->minor->dev; + struct vc4_dev *vc4 = to_vc4_dev(dev); + int i; + + for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) { + seq_printf(m, "%s (0x%04x): 0x%08x\n", + hvs_regs[i].name, hvs_regs[i].reg, + HVS_READ(hvs_regs[i].reg)); + } + + return 0; +} +#endif + +static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + struct drm_device *drm = dev_get_drvdata(master); + struct vc4_dev *vc4 = drm->dev_private; + struct vc4_hvs *hvs = NULL; + + hvs = devm_kzalloc(&pdev->dev, sizeof(*hvs), GFP_KERNEL); + if (!hvs) + return -ENOMEM; + + hvs->pdev = pdev; + + hvs->regs = vc4_ioremap_regs(pdev, 0); + if (IS_ERR(hvs->regs)) + return PTR_ERR(hvs->regs); + + hvs->dlist = hvs->regs + SCALER_DLIST_START; + + vc4->hvs = hvs; + return 0; +} + +static void vc4_hvs_unbind(struct device *dev, struct device *master, + void *data) +{ + struct drm_device *drm = dev_get_drvdata(master); + struct vc4_dev *vc4 = drm->dev_private; + + vc4->hvs = NULL; +} + +static const struct component_ops vc4_hvs_ops = { + .bind = vc4_hvs_bind, + .unbind = vc4_hvs_unbind, +}; + +static int vc4_hvs_dev_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &vc4_hvs_ops); +} + +static int vc4_hvs_dev_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &vc4_hvs_ops); + return 0; +} + +static const struct of_device_id vc4_hvs_dt_match[] = { + { .compatible = "brcm,bcm2835-hvs" }, + {} +}; + +struct platform_driver vc4_hvs_driver = { + .probe = vc4_hvs_dev_probe, + .remove = vc4_hvs_dev_remove, + .driver = { + .name = "vc4_hvs", + .of_match_table = vc4_hvs_dt_match, + }, +}; |