// SPDX-License-Identifier: GPL-2.0 /* * Copyright © 2018 Broadcom * * Authors: * Eric Anholt * Boris Brezillon */ #include #include #include #include #include #include #include #include #include #include #include #include "vc4_drv.h" #include "vc4_regs.h" /* Base address of the output. Raster formats must be 4-byte aligned, * T and LT must be 16-byte aligned or maybe utile-aligned (docs are * inconsistent, but probably utile). */ #define TXP_DST_PTR 0x00 /* Pitch in bytes for raster images, 16-byte aligned. For tiled, it's * the width in tiles. */ #define TXP_DST_PITCH 0x04 /* For T-tiled imgaes, DST_PITCH should be the number of tiles wide, * shifted up. */ # define TXP_T_TILE_WIDTH_SHIFT 7 /* For LT-tiled images, DST_PITCH should be the number of utiles wide, * shifted up. */ # define TXP_LT_TILE_WIDTH_SHIFT 4 /* Pre-rotation width/height of the image. Must match HVS config. * * If TFORMAT and 32-bit, limit is 1920 for 32-bit and 3840 to 16-bit * and width/height must be tile or utile-aligned as appropriate. If * transposing (rotating), width is limited to 1920. * * Height is limited to various numbers between 4088 and 4095. I'd * just use 4088 to be safe. */ #define TXP_DIM 0x08 # define TXP_HEIGHT_SHIFT 16 # define TXP_HEIGHT_MASK GENMASK(31, 16) # define TXP_WIDTH_SHIFT 0 # define TXP_WIDTH_MASK GENMASK(15, 0) #define TXP_DST_CTRL 0x0c /* These bits are set to 0x54 */ #define TXP_PILOT_SHIFT 24 #define TXP_PILOT_MASK GENMASK(31, 24) /* Bits 22-23 are set to 0x01 */ #define TXP_VERSION_SHIFT 22 #define TXP_VERSION_MASK GENMASK(23, 22) /* Powers down the internal memory. */ # define TXP_POWERDOWN BIT(21) /* Enables storing the alpha component in 8888/4444, instead of * filling with ~ALPHA_INVERT. */ # define TXP_ALPHA_ENABLE BIT(20) /* 4 bits, each enables stores for a channel in each set of 4 bytes. * Set to 0xf for normal operation. */ # define TXP_BYTE_ENABLE_SHIFT 16 # define TXP_BYTE_ENABLE_MASK GENMASK(19, 16) /* Debug: Generate VSTART again at EOF. */ # define TXP_VSTART_AT_EOF BIT(15) /* Debug: Terminate the current frame immediately. Stops AXI * writes. */ # define TXP_ABORT BIT(14) # define TXP_DITHER BIT(13) /* Inverts alpha if TXP_ALPHA_ENABLE, chooses fill value for * !TXP_ALPHA_ENABLE. */ # define TXP_ALPHA_INVERT BIT(12) /* Note: I've listed the channels here in high bit (in byte 3/2/1) to * low bit (in byte 0) order. */ # define TXP_FORMAT_SHIFT 8 # define TXP_FORMAT_MASK GENMASK(11, 8) # define TXP_FORMAT_ABGR4444 0 # define TXP_FORMAT_ARGB4444 1 # define TXP_FORMAT_BGRA4444 2 # define TXP_FORMAT_RGBA4444 3 # define TXP_FORMAT_BGR565 6 # define TXP_FORMAT_RGB565 7 /* 888s are non-rotated, raster-only */ # define TXP_FORMAT_BGR888 8 # define TXP_FORMAT_RGB888 9 # define TXP_FORMAT_ABGR8888 12 # define TXP_FORMAT_ARGB8888 13 # define TXP_FORMAT_BGRA8888 14 # define TXP_FORMAT_RGBA8888 15 /* If TFORMAT is set, generates LT instead of T format. */ # define TXP_LINEAR_UTILE BIT(7) /* Rotate output by 90 degrees. */ # define TXP_TRANSPOSE BIT(6) /* Generate a tiled format for V3D. */ # define TXP_TFORMAT BIT(5) /* Generates some undefined test mode output. */ # define TXP_TEST_MODE BIT(4) /* Request odd field from HVS. */ # define TXP_FIELD BIT(3) /* Raise interrupt when idle. */ # define TXP_EI BIT(2) /* Set when generating a frame, clears when idle. */ # define TXP_BUSY BIT(1) /* Starts a frame. Self-clearing. */ # define TXP_GO BIT(0) /* Number of lines received and committed to memory. */ #define TXP_PROGRESS 0x10 #define TXP_READ(offset) readl(txp->regs + (offset)) #define TXP_WRITE(offset, val) writel(val, txp->regs + (offset)) struct vc4_txp { struct platform_device *pdev; struct drm_writeback_connector connector; void __iomem *regs; }; static inline struct vc4_txp *encoder_to_vc4_txp(struct drm_encoder *encoder) { return container_of(encoder, struct vc4_txp, connector.encoder); } static inline struct vc4_txp *connector_to_vc4_txp(struct drm_connector *conn) { return container_of(conn, struct vc4_txp, connector.base); } #define TXP_REG(reg) { reg, #reg } static const struct { u32 reg; const char *name; } txp_regs[] = { TXP_REG(TXP_DST_PTR), TXP_REG(TXP_DST_PITCH), TXP_REG(TXP_DIM), TXP_REG(TXP_DST_CTRL), TXP_REG(TXP_PROGRESS), }; #ifdef CONFIG_DEBUG_FS int vc4_txp_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); struct vc4_txp *txp = vc4->txp; int i; if (!txp) return 0; for (i = 0; i < ARRAY_SIZE(txp_regs); i++) { seq_printf(m, "%s (0x%04x): 0x%08x\n", txp_regs[i].name, txp_regs[i].reg, TXP_READ(txp_regs[i].reg)); } return 0; } #endif static int vc4_txp_connector_get_modes(struct drm_connector *connector) { struct drm_device *dev = connector->dev; return drm_add_modes_noedid(connector, dev->mode_config.max_width, dev->mode_config.max_height); } static enum drm_mode_status vc4_txp_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { struct drm_device *dev = connector->dev; struct drm_mode_config *mode_config = &dev->mode_config; int w = mode->hdisplay, h = mode->vdisplay; if (w < mode_config->min_width || w > mode_config->max_width) return MODE_BAD_HVALUE; if (h < mode_config->min_height || h > mode_config->max_height) return MODE_BAD_VVALUE; return MODE_OK; } static const u32 drm_fmts[] = { DRM_FORMAT_RGB888, DRM_FORMAT_BGR888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XBGR8888, DRM_FORMAT_ARGB8888, DRM_FORMAT_ABGR8888, DRM_FORMAT_RGBX8888, DRM_FORMAT_BGRX8888, DRM_FORMAT_RGBA8888, DRM_FORMAT_BGRA8888, }; static const u32 txp_fmts[] = { TXP_FORMAT_RGB888, TXP_FORMAT_BGR888, TXP_FORMAT_ARGB8888, TXP_FORMAT_ABGR8888, TXP_FORMAT_ARGB8888, TXP_FORMAT_ABGR8888, TXP_FORMAT_RGBA8888, TXP_FORMAT_BGRA8888, TXP_FORMAT_RGBA8888, TXP_FORMAT_BGRA8888, }; static int vc4_txp_connector_atomic_check(struct drm_connector *conn, struct drm_connector_state *conn_state) { struct drm_crtc_state *crtc_state; struct drm_gem_cma_object *gem; struct drm_framebuffer *fb; int i; if (!conn_state->writeback_job || !conn_state->writeback_job->fb) return 0; crtc_state = drm_atomic_get_new_crtc_state(conn_state->state, conn_state->crtc); fb = conn_state->writeback_job->fb; if (fb->width != crtc_state->mode.hdisplay || fb->height != crtc_state->mode.vdisplay) { DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n", fb->width, fb->height); return -EINVAL; } for (i = 0; i < ARRAY_SIZE(drm_fmts); i++) { if (fb->format->format == drm_fmts[i]) break; } if (i == ARRAY_SIZE(drm_fmts)) return -EINVAL; gem = drm_fb_cma_get_gem_obj(fb, 0); /* Pitch must be aligned on 16 bytes. */ if (fb->pitches[0] & GENMASK(3, 0)) return -EINVAL; vc4_crtc_txp_armed(crtc_state); return 0; } static void vc4_txp_connector_atomic_commit(struct drm_connector *conn, struct drm_connector_state *conn_state) { struct vc4_txp *txp = connector_to_vc4_txp(conn); struct drm_gem_cma_object *gem; struct drm_display_mode *mode; struct drm_framebuffer *fb; u32 ctrl; int i; if (WARN_ON(!conn_state->writeback_job || !conn_state->writeback_job->fb)) return; mode = &conn_state->crtc->state->adjusted_mode; fb = conn_state->writeback_job->fb; for (i = 0; i < ARRAY_SIZE(drm_fmts); i++) { if (fb->format->format == drm_fmts[i]) break; } if (WARN_ON(i == ARRAY_SIZE(drm_fmts))) return; ctrl = TXP_GO | TXP_EI | VC4_SET_FIELD(0xf, TXP_BYTE_ENABLE) | VC4_SET_FIELD(txp_fmts[i], TXP_FORMAT); if (fb->format->has_alpha) ctrl |= TXP_ALPHA_ENABLE; else /* * If TXP_ALPHA_ENABLE isn't set and TXP_ALPHA_INVERT is, the * hardware will force the output padding to be 0xff. */ ctrl |= TXP_ALPHA_INVERT; gem = drm_fb_cma_get_gem_obj(fb, 0); TXP_WRITE(TXP_DST_PTR, gem->paddr + fb->offsets[0]); TXP_WRITE(TXP_DST_PITCH, fb->pitches[0]); TXP_WRITE(TXP_DIM, VC4_SET_FIELD(mode->hdisplay, TXP_WIDTH) | VC4_SET_FIELD(mode->vdisplay, TXP_HEIGHT)); TXP_WRITE(TXP_DST_CTRL, ctrl); drm_writeback_queue_job(&txp->connector, conn_state->writeback_job); } static const struct drm_connector_helper_funcs vc4_txp_connector_helper_funcs = { .get_modes = vc4_txp_connector_get_modes, .mode_valid = vc4_txp_connector_mode_valid, .atomic_check = vc4_txp_connector_atomic_check, .atomic_commit = vc4_txp_connector_atomic_commit, }; static enum drm_connector_status vc4_txp_connector_detect(struct drm_connector *connector, bool force) { return connector_status_connected; } static void vc4_txp_connector_destroy(struct drm_connector *connector) { drm_connector_unregister(connector); drm_connector_cleanup(connector); } static const struct drm_connector_funcs vc4_txp_connector_funcs = { .detect = vc4_txp_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .destroy = vc4_txp_connector_destroy, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static void vc4_txp_encoder_disable(struct drm_encoder *encoder) { struct vc4_txp *txp = encoder_to_vc4_txp(encoder); if (TXP_READ(TXP_DST_CTRL) & TXP_BUSY) { unsigned long timeout = jiffies + msecs_to_jiffies(1000); TXP_WRITE(TXP_DST_CTRL, TXP_ABORT); while (TXP_READ(TXP_DST_CTRL) & TXP_BUSY && time_before(jiffies, timeout)) ; WARN_ON(TXP_READ(TXP_DST_CTRL) & TXP_BUSY); } TXP_WRITE(TXP_DST_CTRL, TXP_POWERDOWN); } static const struct drm_encoder_helper_funcs vc4_txp_encoder_helper_funcs = { .disable = vc4_txp_encoder_disable, }; static irqreturn_t vc4_txp_interrupt(int irq, void *data) { struct vc4_txp *txp = data; TXP_WRITE(TXP_DST_CTRL, TXP_READ(TXP_DST_CTRL) & ~TXP_EI); vc4_crtc_handle_vblank(to_vc4_crtc(txp->connector.base.state->crtc)); drm_writeback_signal_completion(&txp->connector, 0); return IRQ_HANDLED; } static int vc4_txp_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 = to_vc4_dev(drm); struct vc4_txp *txp; int ret, irq; irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; txp = devm_kzalloc(dev, sizeof(*txp), GFP_KERNEL); if (!txp) return -ENOMEM; txp->pdev = pdev; txp->regs = vc4_ioremap_regs(pdev, 0); if (IS_ERR(txp->regs)) return PTR_ERR(txp->regs); drm_connector_helper_add(&txp->connector.base, &vc4_txp_connector_helper_funcs); ret = drm_writeback_connector_init(drm, &txp->connector, &vc4_txp_connector_funcs, &vc4_txp_encoder_helper_funcs, drm_fmts, ARRAY_SIZE(drm_fmts)); if (ret) return ret; ret = devm_request_irq(dev, irq, vc4_txp_interrupt, 0, dev_name(dev), txp); if (ret) return ret; dev_set_drvdata(dev, txp); vc4->txp = txp; return 0; } static void vc4_txp_unbind(struct device *dev, struct device *master, void *data) { struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_txp *txp = dev_get_drvdata(dev); vc4_txp_connector_destroy(&txp->connector.base); vc4->txp = NULL; } static const struct component_ops vc4_txp_ops = { .bind = vc4_txp_bind, .unbind = vc4_txp_unbind, }; static int vc4_txp_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &vc4_txp_ops); } static int vc4_txp_remove(struct platform_device *pdev) { component_del(&pdev->dev, &vc4_txp_ops); return 0; } static const struct of_device_id vc4_txp_dt_match[] = { { .compatible = "brcm,bcm2835-txp" }, { /* sentinel */ }, }; struct platform_driver vc4_txp_driver = { .probe = vc4_txp_probe, .remove = vc4_txp_remove, .driver = { .name = "vc4_txp", .of_match_table = vc4_txp_dt_match, }, };