Merge tag 'drm-vc4-next-2015-10-21' of http://github.com/anholt/linux into drm-next
authorDave Airlie <airlied@redhat.com>
Thu, 22 Oct 2015 00:23:31 +0000 (10:23 +1000)
committerDave Airlie <airlied@redhat.com>
Thu, 22 Oct 2015 00:31:17 +0000 (10:31 +1000)
This pull request introduces the vc4 driver, for kernel modesetting on
the Raspberry Pi (bcm2835/bcm2836 architectures).  It currently
supports a display plane and cursor on the HDMI output.  The driver
doesn't do 3D, power management, or overlay planes yet.

[airlied: fixup the enable/disable vblank APIs]

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* tag 'drm-vc4-next-2015-10-21' of http://github.com/anholt/linux:
  drm/vc4: Allow vblank to be disabled
  drm/vc4: Use the fbdev_cma helpers
  drm/vc4: Add KMS support for Raspberry Pi.
  drm/vc4: Add devicetree bindings for VC4.

1  2 
drivers/gpu/drm/Makefile
drivers/gpu/drm/vc4/vc4_crtc.c
drivers/gpu/drm/vc4/vc4_drv.h

Simple merge
index 0000000,8489d5b..7a9f476
mode 000000,100644..100644
--- /dev/null
@@@ -1,0 -1,672 +1,672 @@@
 -int vc4_enable_vblank(struct drm_device *dev, int crtc_id)
+ /*
+  * 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 CRTC module
+  *
+  * In VC4, the Pixel Valve is what most closely corresponds to the
+  * DRM's concept of a CRTC.  The PV generates video timings from the
+  * output's clock plus its configuration.  It pulls scaled pixels from
+  * the HVS at that timing, and feeds it to the encoder.
+  *
+  * However, the DRM CRTC also collects the configuration of all the
+  * DRM planes attached to it.  As a result, this file also manages
+  * setup of the VC4 HVS's display elements on the CRTC.
+  *
+  * The 2835 has 3 different pixel valves.  pv0 in the audio power
+  * domain feeds DSI0 or DPI, while pv1 feeds DS1 or SMI.  pv2 in the
+  * image domain can feed either HDMI or the SDTV controller.  The
+  * pixel valve chooses from the CPRMAN clocks (HSM for HDMI, VEC for
+  * SDTV, etc.) according to which output type is chosen in the mux.
+  *
+  * For power management, the pixel valve's registers are all clocked
+  * by the AXI clock, while the timings and FIFOs make use of the
+  * output-specific clock.  Since the encoders also directly consume
+  * the CPRMAN clocks, and know what timings they need, they are the
+  * ones that set the clock.
+  */
+ #include "drm_atomic.h"
+ #include "drm_atomic_helper.h"
+ #include "drm_crtc_helper.h"
+ #include "linux/clk.h"
+ #include "linux/component.h"
+ #include "linux/of_device.h"
+ #include "vc4_drv.h"
+ #include "vc4_regs.h"
+ struct vc4_crtc {
+       struct drm_crtc base;
+       const struct vc4_crtc_data *data;
+       void __iomem *regs;
+       /* Which HVS channel we're using for our CRTC. */
+       int channel;
+       /* Pointer to the actual hardware display list memory for the
+        * crtc.
+        */
+       u32 __iomem *dlist;
+       u32 dlist_size; /* in dwords */
+       struct drm_pending_vblank_event *event;
+ };
+ static inline struct vc4_crtc *
+ to_vc4_crtc(struct drm_crtc *crtc)
+ {
+       return (struct vc4_crtc *)crtc;
+ }
+ struct vc4_crtc_data {
+       /* Which channel of the HVS this pixelvalve sources from. */
+       int hvs_channel;
+       enum vc4_encoder_type encoder0_type;
+       enum vc4_encoder_type encoder1_type;
+ };
+ #define CRTC_WRITE(offset, val) writel(val, vc4_crtc->regs + (offset))
+ #define CRTC_READ(offset) readl(vc4_crtc->regs + (offset))
+ #define CRTC_REG(reg) { reg, #reg }
+ static const struct {
+       u32 reg;
+       const char *name;
+ } crtc_regs[] = {
+       CRTC_REG(PV_CONTROL),
+       CRTC_REG(PV_V_CONTROL),
+       CRTC_REG(PV_VSYNCD),
+       CRTC_REG(PV_HORZA),
+       CRTC_REG(PV_HORZB),
+       CRTC_REG(PV_VERTA),
+       CRTC_REG(PV_VERTB),
+       CRTC_REG(PV_VERTA_EVEN),
+       CRTC_REG(PV_VERTB_EVEN),
+       CRTC_REG(PV_INTEN),
+       CRTC_REG(PV_INTSTAT),
+       CRTC_REG(PV_STAT),
+       CRTC_REG(PV_HACT_ACT),
+ };
+ static void vc4_crtc_dump_regs(struct vc4_crtc *vc4_crtc)
+ {
+       int i;
+       for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) {
+               DRM_INFO("0x%04x (%s): 0x%08x\n",
+                        crtc_regs[i].reg, crtc_regs[i].name,
+                        CRTC_READ(crtc_regs[i].reg));
+       }
+ }
+ #ifdef CONFIG_DEBUG_FS
+ int vc4_crtc_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;
+       int crtc_index = (uintptr_t)node->info_ent->data;
+       struct drm_crtc *crtc;
+       struct vc4_crtc *vc4_crtc;
+       int i;
+       i = 0;
+       list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+               if (i == crtc_index)
+                       break;
+               i++;
+       }
+       if (!crtc)
+               return 0;
+       vc4_crtc = to_vc4_crtc(crtc);
+       for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) {
+               seq_printf(m, "%s (0x%04x): 0x%08x\n",
+                          crtc_regs[i].name, crtc_regs[i].reg,
+                          CRTC_READ(crtc_regs[i].reg));
+       }
+       return 0;
+ }
+ #endif
+ static void vc4_crtc_destroy(struct drm_crtc *crtc)
+ {
+       drm_crtc_cleanup(crtc);
+ }
+ static u32 vc4_get_fifo_full_level(u32 format)
+ {
+       static const u32 fifo_len_bytes = 64;
+       static const u32 hvs_latency_pix = 6;
+       switch (format) {
+       case PV_CONTROL_FORMAT_DSIV_16:
+       case PV_CONTROL_FORMAT_DSIC_16:
+               return fifo_len_bytes - 2 * hvs_latency_pix;
+       case PV_CONTROL_FORMAT_DSIV_18:
+               return fifo_len_bytes - 14;
+       case PV_CONTROL_FORMAT_24:
+       case PV_CONTROL_FORMAT_DSIV_24:
+       default:
+               return fifo_len_bytes - 3 * hvs_latency_pix;
+       }
+ }
+ /*
+  * Returns the clock select bit for the connector attached to the
+  * CRTC.
+  */
+ static int vc4_get_clock_select(struct drm_crtc *crtc)
+ {
+       struct drm_connector *connector;
+       drm_for_each_connector(connector, crtc->dev) {
+               if (connector && connector->state->crtc == crtc) {
+                       struct drm_encoder *encoder = connector->encoder;
+                       struct vc4_encoder *vc4_encoder =
+                               to_vc4_encoder(encoder);
+                       return vc4_encoder->clock_select;
+               }
+       }
+       return -1;
+ }
+ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
+ {
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       struct drm_crtc_state *state = crtc->state;
+       struct drm_display_mode *mode = &state->adjusted_mode;
+       bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
+       u32 vactive = (mode->vdisplay >> (interlace ? 1 : 0));
+       u32 format = PV_CONTROL_FORMAT_24;
+       bool debug_dump_regs = false;
+       int clock_select = vc4_get_clock_select(crtc);
+       if (debug_dump_regs) {
+               DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc));
+               vc4_crtc_dump_regs(vc4_crtc);
+       }
+       /* Reset the PV fifo. */
+       CRTC_WRITE(PV_CONTROL, 0);
+       CRTC_WRITE(PV_CONTROL, PV_CONTROL_FIFO_CLR | PV_CONTROL_EN);
+       CRTC_WRITE(PV_CONTROL, 0);
+       CRTC_WRITE(PV_HORZA,
+                  VC4_SET_FIELD(mode->htotal - mode->hsync_end,
+                                PV_HORZA_HBP) |
+                  VC4_SET_FIELD(mode->hsync_end - mode->hsync_start,
+                                PV_HORZA_HSYNC));
+       CRTC_WRITE(PV_HORZB,
+                  VC4_SET_FIELD(mode->hsync_start - mode->hdisplay,
+                                PV_HORZB_HFP) |
+                  VC4_SET_FIELD(mode->hdisplay, PV_HORZB_HACTIVE));
+       if (interlace) {
+               CRTC_WRITE(PV_VERTA_EVEN,
+                          VC4_SET_FIELD(mode->vtotal - mode->vsync_end - 1,
+                                        PV_VERTA_VBP) |
+                          VC4_SET_FIELD(mode->vsync_end - mode->vsync_start,
+                                        PV_VERTA_VSYNC));
+               CRTC_WRITE(PV_VERTB_EVEN,
+                          VC4_SET_FIELD(mode->vsync_start - mode->vdisplay,
+                                        PV_VERTB_VFP) |
+                          VC4_SET_FIELD(vactive, PV_VERTB_VACTIVE));
+       }
+       CRTC_WRITE(PV_HACT_ACT, mode->hdisplay);
+       CRTC_WRITE(PV_V_CONTROL,
+                  PV_VCONTROL_CONTINUOUS |
+                  (interlace ? PV_VCONTROL_INTERLACE : 0));
+       CRTC_WRITE(PV_CONTROL,
+                  VC4_SET_FIELD(format, PV_CONTROL_FORMAT) |
+                  VC4_SET_FIELD(vc4_get_fifo_full_level(format),
+                                PV_CONTROL_FIFO_LEVEL) |
+                  PV_CONTROL_CLR_AT_START |
+                  PV_CONTROL_TRIGGER_UNDERFLOW |
+                  PV_CONTROL_WAIT_HSTART |
+                  VC4_SET_FIELD(clock_select, PV_CONTROL_CLK_SELECT) |
+                  PV_CONTROL_FIFO_CLR |
+                  PV_CONTROL_EN);
+       if (debug_dump_regs) {
+               DRM_INFO("CRTC %d regs after:\n", drm_crtc_index(crtc));
+               vc4_crtc_dump_regs(vc4_crtc);
+       }
+ }
+ static void require_hvs_enabled(struct drm_device *dev)
+ {
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       WARN_ON_ONCE((HVS_READ(SCALER_DISPCTRL) & SCALER_DISPCTRL_ENABLE) !=
+                    SCALER_DISPCTRL_ENABLE);
+ }
+ static void vc4_crtc_disable(struct drm_crtc *crtc)
+ {
+       struct drm_device *dev = crtc->dev;
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       u32 chan = vc4_crtc->channel;
+       int ret;
+       require_hvs_enabled(dev);
+       CRTC_WRITE(PV_V_CONTROL,
+                  CRTC_READ(PV_V_CONTROL) & ~PV_VCONTROL_VIDEN);
+       ret = wait_for(!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN), 1);
+       WARN_ONCE(ret, "Timeout waiting for !PV_VCONTROL_VIDEN\n");
+       if (HVS_READ(SCALER_DISPCTRLX(chan)) &
+           SCALER_DISPCTRLX_ENABLE) {
+               HVS_WRITE(SCALER_DISPCTRLX(chan),
+                         SCALER_DISPCTRLX_RESET);
+               /* While the docs say that reset is self-clearing, it
+                * seems it doesn't actually.
+                */
+               HVS_WRITE(SCALER_DISPCTRLX(chan), 0);
+       }
+       /* Once we leave, the scaler should be disabled and its fifo empty. */
+       WARN_ON_ONCE(HVS_READ(SCALER_DISPCTRLX(chan)) & SCALER_DISPCTRLX_RESET);
+       WARN_ON_ONCE(VC4_GET_FIELD(HVS_READ(SCALER_DISPSTATX(chan)),
+                                  SCALER_DISPSTATX_MODE) !=
+                    SCALER_DISPSTATX_MODE_DISABLED);
+       WARN_ON_ONCE((HVS_READ(SCALER_DISPSTATX(chan)) &
+                     (SCALER_DISPSTATX_FULL | SCALER_DISPSTATX_EMPTY)) !=
+                    SCALER_DISPSTATX_EMPTY);
+ }
+ static void vc4_crtc_enable(struct drm_crtc *crtc)
+ {
+       struct drm_device *dev = crtc->dev;
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       struct drm_crtc_state *state = crtc->state;
+       struct drm_display_mode *mode = &state->adjusted_mode;
+       require_hvs_enabled(dev);
+       /* Turn on the scaler, which will wait for vstart to start
+        * compositing.
+        */
+       HVS_WRITE(SCALER_DISPCTRLX(vc4_crtc->channel),
+                 VC4_SET_FIELD(mode->hdisplay, SCALER_DISPCTRLX_WIDTH) |
+                 VC4_SET_FIELD(mode->vdisplay, SCALER_DISPCTRLX_HEIGHT) |
+                 SCALER_DISPCTRLX_ENABLE);
+       /* Turn on the pixel valve, which will emit the vstart signal. */
+       CRTC_WRITE(PV_V_CONTROL,
+                  CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN);
+ }
+ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
+                                struct drm_crtc_state *state)
+ {
+       struct drm_device *dev = crtc->dev;
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct drm_plane *plane;
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       u32 dlist_count = 0;
+       /* The pixelvalve can only feed one encoder (and encoders are
+        * 1:1 with connectors.)
+        */
+       if (drm_atomic_connectors_for_crtc(state->state, crtc) > 1)
+               return -EINVAL;
+       drm_atomic_crtc_state_for_each_plane(plane, state) {
+               struct drm_plane_state *plane_state =
+                       state->state->plane_states[drm_plane_index(plane)];
+               /* plane might not have changed, in which case take
+                * current state:
+                */
+               if (!plane_state)
+                       plane_state = plane->state;
+               dlist_count += vc4_plane_dlist_size(plane_state);
+       }
+       dlist_count++; /* Account for SCALER_CTL0_END. */
+       if (!vc4_crtc->dlist || dlist_count > vc4_crtc->dlist_size) {
+               vc4_crtc->dlist = ((u32 __iomem *)vc4->hvs->dlist +
+                                  HVS_BOOTLOADER_DLIST_END);
+               vc4_crtc->dlist_size = ((SCALER_DLIST_SIZE >> 2) -
+                                       HVS_BOOTLOADER_DLIST_END);
+               if (dlist_count > vc4_crtc->dlist_size) {
+                       DRM_DEBUG_KMS("dlist too large for CRTC (%d > %d).\n",
+                                     dlist_count, vc4_crtc->dlist_size);
+                       return -EINVAL;
+               }
+       }
+       return 0;
+ }
+ static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
+                                 struct drm_crtc_state *old_state)
+ {
+       struct drm_device *dev = crtc->dev;
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       struct drm_plane *plane;
+       bool debug_dump_regs = false;
+       u32 __iomem *dlist_next = vc4_crtc->dlist;
+       if (debug_dump_regs) {
+               DRM_INFO("CRTC %d HVS before:\n", drm_crtc_index(crtc));
+               vc4_hvs_dump_state(dev);
+       }
+       /* Copy all the active planes' dlist contents to the hardware dlist.
+        *
+        * XXX: If the new display list was large enough that it
+        * overlapped a currently-read display list, we need to do
+        * something like disable scanout before putting in the new
+        * list.  For now, we're safe because we only have the two
+        * planes.
+        */
+       drm_atomic_crtc_for_each_plane(plane, crtc) {
+               dlist_next += vc4_plane_write_dlist(plane, dlist_next);
+       }
+       if (dlist_next == vc4_crtc->dlist) {
+               /* If no planes were enabled, use the SCALER_CTL0_END
+                * at the start of the display list memory (in the
+                * bootloader section).  We'll rewrite that
+                * SCALER_CTL0_END, just in case, though.
+                */
+               writel(SCALER_CTL0_END, vc4->hvs->dlist);
+               HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel), 0);
+       } else {
+               writel(SCALER_CTL0_END, dlist_next);
+               dlist_next++;
+               HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel),
+                         (u32 *)vc4_crtc->dlist - (u32 *)vc4->hvs->dlist);
+               /* Make the next display list start after ours. */
+               vc4_crtc->dlist_size -= (dlist_next - vc4_crtc->dlist);
+               vc4_crtc->dlist = dlist_next;
+       }
+       if (debug_dump_regs) {
+               DRM_INFO("CRTC %d HVS after:\n", drm_crtc_index(crtc));
+               vc4_hvs_dump_state(dev);
+       }
+       if (crtc->state->event) {
+               unsigned long flags;
+               crtc->state->event->pipe = drm_crtc_index(crtc);
+               WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+               spin_lock_irqsave(&dev->event_lock, flags);
+               vc4_crtc->event = crtc->state->event;
+               spin_unlock_irqrestore(&dev->event_lock, flags);
+               crtc->state->event = NULL;
+       }
+ }
 -void vc4_disable_vblank(struct drm_device *dev, int crtc_id)
++int vc4_enable_vblank(struct drm_device *dev, unsigned int crtc_id)
+ {
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
+       CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
+       return 0;
+ }
++void vc4_disable_vblank(struct drm_device *dev, unsigned int crtc_id)
+ {
+       struct vc4_dev *vc4 = to_vc4_dev(dev);
+       struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
+       CRTC_WRITE(PV_INTEN, 0);
+ }
+ static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
+ {
+       struct drm_crtc *crtc = &vc4_crtc->base;
+       struct drm_device *dev = crtc->dev;
+       unsigned long flags;
+       spin_lock_irqsave(&dev->event_lock, flags);
+       if (vc4_crtc->event) {
+               drm_crtc_send_vblank_event(crtc, vc4_crtc->event);
+               vc4_crtc->event = NULL;
+       }
+       spin_unlock_irqrestore(&dev->event_lock, flags);
+ }
+ static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
+ {
+       struct vc4_crtc *vc4_crtc = data;
+       u32 stat = CRTC_READ(PV_INTSTAT);
+       irqreturn_t ret = IRQ_NONE;
+       if (stat & PV_INT_VFP_START) {
+               CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
+               drm_crtc_handle_vblank(&vc4_crtc->base);
+               vc4_crtc_handle_page_flip(vc4_crtc);
+               ret = IRQ_HANDLED;
+       }
+       return ret;
+ }
+ static const struct drm_crtc_funcs vc4_crtc_funcs = {
+       .set_config = drm_atomic_helper_set_config,
+       .destroy = vc4_crtc_destroy,
+       .page_flip = drm_atomic_helper_page_flip,
+       .set_property = NULL,
+       .cursor_set = NULL, /* handled by drm_mode_cursor_universal */
+       .cursor_move = NULL, /* handled by drm_mode_cursor_universal */
+       .reset = drm_atomic_helper_crtc_reset,
+       .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+       .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+ };
+ static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = {
+       .mode_set_nofb = vc4_crtc_mode_set_nofb,
+       .disable = vc4_crtc_disable,
+       .enable = vc4_crtc_enable,
+       .atomic_check = vc4_crtc_atomic_check,
+       .atomic_flush = vc4_crtc_atomic_flush,
+ };
+ /* Frees the page flip event when the DRM device is closed with the
+  * event still outstanding.
+  */
+ void vc4_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
+ {
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       struct drm_device *dev = crtc->dev;
+       unsigned long flags;
+       spin_lock_irqsave(&dev->event_lock, flags);
+       if (vc4_crtc->event && vc4_crtc->event->base.file_priv == file) {
+               vc4_crtc->event->base.destroy(&vc4_crtc->event->base);
+               drm_crtc_vblank_put(crtc);
+               vc4_crtc->event = NULL;
+       }
+       spin_unlock_irqrestore(&dev->event_lock, flags);
+ }
+ static const struct vc4_crtc_data pv0_data = {
+       .hvs_channel = 0,
+       .encoder0_type = VC4_ENCODER_TYPE_DSI0,
+       .encoder1_type = VC4_ENCODER_TYPE_DPI,
+ };
+ static const struct vc4_crtc_data pv1_data = {
+       .hvs_channel = 2,
+       .encoder0_type = VC4_ENCODER_TYPE_DSI1,
+       .encoder1_type = VC4_ENCODER_TYPE_SMI,
+ };
+ static const struct vc4_crtc_data pv2_data = {
+       .hvs_channel = 1,
+       .encoder0_type = VC4_ENCODER_TYPE_VEC,
+       .encoder1_type = VC4_ENCODER_TYPE_HDMI,
+ };
+ static const struct of_device_id vc4_crtc_dt_match[] = {
+       { .compatible = "brcm,bcm2835-pixelvalve0", .data = &pv0_data },
+       { .compatible = "brcm,bcm2835-pixelvalve1", .data = &pv1_data },
+       { .compatible = "brcm,bcm2835-pixelvalve2", .data = &pv2_data },
+       {}
+ };
+ static void vc4_set_crtc_possible_masks(struct drm_device *drm,
+                                       struct drm_crtc *crtc)
+ {
+       struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
+       struct drm_encoder *encoder;
+       drm_for_each_encoder(encoder, drm) {
+               struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
+               if (vc4_encoder->type == vc4_crtc->data->encoder0_type) {
+                       vc4_encoder->clock_select = 0;
+                       encoder->possible_crtcs |= drm_crtc_mask(crtc);
+               } else if (vc4_encoder->type == vc4_crtc->data->encoder1_type) {
+                       vc4_encoder->clock_select = 1;
+                       encoder->possible_crtcs |= drm_crtc_mask(crtc);
+               }
+       }
+ }
+ static int vc4_crtc_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_crtc *vc4_crtc;
+       struct drm_crtc *crtc;
+       struct drm_plane *primary_plane, *cursor_plane;
+       const struct of_device_id *match;
+       int ret;
+       vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
+       if (!vc4_crtc)
+               return -ENOMEM;
+       crtc = &vc4_crtc->base;
+       match = of_match_device(vc4_crtc_dt_match, dev);
+       if (!match)
+               return -ENODEV;
+       vc4_crtc->data = match->data;
+       vc4_crtc->regs = vc4_ioremap_regs(pdev, 0);
+       if (IS_ERR(vc4_crtc->regs))
+               return PTR_ERR(vc4_crtc->regs);
+       /* For now, we create just the primary and the legacy cursor
+        * planes.  We should be able to stack more planes on easily,
+        * but to do that we would need to compute the bandwidth
+        * requirement of the plane configuration, and reject ones
+        * that will take too much.
+        */
+       primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
+       if (!primary_plane) {
+               dev_err(dev, "failed to construct primary plane\n");
+               ret = PTR_ERR(primary_plane);
+               goto err;
+       }
+       cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
+       if (!cursor_plane) {
+               dev_err(dev, "failed to construct cursor plane\n");
+               ret = PTR_ERR(cursor_plane);
+               goto err_primary;
+       }
+       drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane,
+                                 &vc4_crtc_funcs);
+       drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs);
+       primary_plane->crtc = crtc;
+       cursor_plane->crtc = crtc;
+       vc4->crtc[drm_crtc_index(crtc)] = vc4_crtc;
+       vc4_crtc->channel = vc4_crtc->data->hvs_channel;
+       CRTC_WRITE(PV_INTEN, 0);
+       CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
+       ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
+                              vc4_crtc_irq_handler, 0, "vc4 crtc", vc4_crtc);
+       if (ret)
+               goto err_cursor;
+       vc4_set_crtc_possible_masks(drm, crtc);
+       platform_set_drvdata(pdev, vc4_crtc);
+       return 0;
+ err_cursor:
+       cursor_plane->funcs->destroy(cursor_plane);
+ err_primary:
+       primary_plane->funcs->destroy(primary_plane);
+ err:
+       return ret;
+ }
+ static void vc4_crtc_unbind(struct device *dev, struct device *master,
+                           void *data)
+ {
+       struct platform_device *pdev = to_platform_device(dev);
+       struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev);
+       vc4_crtc_destroy(&vc4_crtc->base);
+       CRTC_WRITE(PV_INTEN, 0);
+       platform_set_drvdata(pdev, NULL);
+ }
+ static const struct component_ops vc4_crtc_ops = {
+       .bind   = vc4_crtc_bind,
+       .unbind = vc4_crtc_unbind,
+ };
+ static int vc4_crtc_dev_probe(struct platform_device *pdev)
+ {
+       return component_add(&pdev->dev, &vc4_crtc_ops);
+ }
+ static int vc4_crtc_dev_remove(struct platform_device *pdev)
+ {
+       component_del(&pdev->dev, &vc4_crtc_ops);
+       return 0;
+ }
+ struct platform_driver vc4_crtc_driver = {
+       .probe = vc4_crtc_dev_probe,
+       .remove = vc4_crtc_dev_remove,
+       .driver = {
+               .name = "vc4_crtc",
+               .of_match_table = vc4_crtc_dt_match,
+       },
+ };
index 0000000,57f54e0..fd8319f
mode 000000,100644..100644
--- /dev/null
@@@ -1,0 -1,145 +1,145 @@@
 -int vc4_enable_vblank(struct drm_device *dev, int crtc_id);
 -void vc4_disable_vblank(struct drm_device *dev, int crtc_id);
+ /*
+  * 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.
+  */
+ #include "drmP.h"
+ #include "drm_gem_cma_helper.h"
+ struct vc4_dev {
+       struct drm_device *dev;
+       struct vc4_hdmi *hdmi;
+       struct vc4_hvs *hvs;
+       struct vc4_crtc *crtc[3];
+       struct drm_fbdev_cma *fbdev;
+ };
+ static inline struct vc4_dev *
+ to_vc4_dev(struct drm_device *dev)
+ {
+       return (struct vc4_dev *)dev->dev_private;
+ }
+ struct vc4_bo {
+       struct drm_gem_cma_object base;
+ };
+ static inline struct vc4_bo *
+ to_vc4_bo(struct drm_gem_object *bo)
+ {
+       return (struct vc4_bo *)bo;
+ }
+ struct vc4_hvs {
+       struct platform_device *pdev;
+       void __iomem *regs;
+       void __iomem *dlist;
+ };
+ struct vc4_plane {
+       struct drm_plane base;
+ };
+ static inline struct vc4_plane *
+ to_vc4_plane(struct drm_plane *plane)
+ {
+       return (struct vc4_plane *)plane;
+ }
+ enum vc4_encoder_type {
+       VC4_ENCODER_TYPE_HDMI,
+       VC4_ENCODER_TYPE_VEC,
+       VC4_ENCODER_TYPE_DSI0,
+       VC4_ENCODER_TYPE_DSI1,
+       VC4_ENCODER_TYPE_SMI,
+       VC4_ENCODER_TYPE_DPI,
+ };
+ struct vc4_encoder {
+       struct drm_encoder base;
+       enum vc4_encoder_type type;
+       u32 clock_select;
+ };
+ static inline struct vc4_encoder *
+ to_vc4_encoder(struct drm_encoder *encoder)
+ {
+       return container_of(encoder, struct vc4_encoder, base);
+ }
+ #define HVS_READ(offset) readl(vc4->hvs->regs + offset)
+ #define HVS_WRITE(offset, val) writel(val, vc4->hvs->regs + offset)
+ /**
+  * _wait_for - magic (register) wait macro
+  *
+  * Does the right thing for modeset paths when run under kdgb or similar atomic
+  * contexts. Note that it's important that we check the condition again after
+  * having timed out, since the timeout could be due to preemption or similar and
+  * we've never had a chance to check the condition before the timeout.
+  */
+ #define _wait_for(COND, MS, W) ({ \
+       unsigned long timeout__ = jiffies + msecs_to_jiffies(MS) + 1;   \
+       int ret__ = 0;                                                  \
+       while (!(COND)) {                                               \
+               if (time_after(jiffies, timeout__)) {                   \
+                       if (!(COND))                                    \
+                               ret__ = -ETIMEDOUT;                     \
+                       break;                                          \
+               }                                                       \
+               if (W && drm_can_sleep())  {                            \
+                       msleep(W);                                      \
+               } else {                                                \
+                       cpu_relax();                                    \
+               }                                                       \
+       }                                                               \
+       ret__;                                                          \
+ })
+ #define wait_for(COND, MS) _wait_for(COND, MS, 1)
+ /* vc4_bo.c */
+ void vc4_free_object(struct drm_gem_object *gem_obj);
+ struct vc4_bo *vc4_bo_create(struct drm_device *dev, size_t size);
+ int vc4_dumb_create(struct drm_file *file_priv,
+                   struct drm_device *dev,
+                   struct drm_mode_create_dumb *args);
+ struct dma_buf *vc4_prime_export(struct drm_device *dev,
+                                struct drm_gem_object *obj, int flags);
+ /* vc4_crtc.c */
+ extern struct platform_driver vc4_crtc_driver;
++int vc4_enable_vblank(struct drm_device *dev, unsigned int crtc_id);
++void vc4_disable_vblank(struct drm_device *dev, unsigned int crtc_id);
+ void vc4_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
+ int vc4_crtc_debugfs_regs(struct seq_file *m, void *arg);
+ /* vc4_debugfs.c */
+ int vc4_debugfs_init(struct drm_minor *minor);
+ void vc4_debugfs_cleanup(struct drm_minor *minor);
+ /* vc4_drv.c */
+ void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
+ /* vc4_hdmi.c */
+ extern struct platform_driver vc4_hdmi_driver;
+ int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused);
+ /* vc4_hvs.c */
+ extern struct platform_driver vc4_hvs_driver;
+ void vc4_hvs_dump_state(struct drm_device *dev);
+ int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused);
+ /* vc4_kms.c */
+ int vc4_kms_load(struct drm_device *dev);
+ /* vc4_plane.c */
+ struct drm_plane *vc4_plane_init(struct drm_device *dev,
+                                enum drm_plane_type type);
+ u32 vc4_plane_write_dlist(struct drm_plane *plane, u32 __iomem *dlist);
+ u32 vc4_plane_dlist_size(struct drm_plane_state *state);