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openwrt/target/linux/brcm2708/patches-4.9/0106-drm-vc4-Add-a-mode-for-using-the-closed-firmware-for.patch

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brcm2708: add linux 4.9 support Patches from Raspberry Pi repo: https://github.com/raspberrypi/linux/commits/rpi-4.9.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2017-02-07 20:07:54 +00:00
From 12d493c17841adf193361623a64cd85804dea94f Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Wed, 14 Sep 2016 08:39:33 +0100
Subject: [PATCH] drm/vc4: Add a mode for using the closed firmware for
display.
Signed-off-by: Eric Anholt <eric@anholt.net>
---
drivers/gpu/drm/vc4/Makefile | 1 +
drivers/gpu/drm/vc4/vc4_crtc.c | 13 +
drivers/gpu/drm/vc4/vc4_drv.c | 1 +
drivers/gpu/drm/vc4/vc4_drv.h | 7 +
drivers/gpu/drm/vc4/vc4_firmware_kms.c | 660 +++++++++++++++++++++++++++++++++
5 files changed, 682 insertions(+)
create mode 100644 drivers/gpu/drm/vc4/vc4_firmware_kms.c
--- a/drivers/gpu/drm/vc4/Makefile
+++ b/drivers/gpu/drm/vc4/Makefile
@@ -8,6 +8,7 @@ vc4-y := \
vc4_crtc.o \
vc4_drv.o \
vc4_dpi.o \
+ vc4_firmware_kms.o \
vc4_kms.o \
vc4_gem.o \
vc4_hdmi.o \
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -163,6 +163,9 @@ int vc4_crtc_get_scanoutpos(struct drm_d
int vblank_lines;
int ret = 0;
+ if (vc4->firmware_kms)
+ return 0;
+
/* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
/* Get optional system timestamp before query. */
@@ -656,6 +659,11 @@ int vc4_enable_vblank(struct drm_device
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
+ if (vc4->firmware_kms) {
+ /* XXX: Can we mask the SMI interrupt? */
+ return 0;
+ }
+
CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
return 0;
@@ -666,6 +674,11 @@ void vc4_disable_vblank(struct drm_devic
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id];
+ if (vc4->firmware_kms) {
+ /* XXX: Can we mask the SMI interrupt? */
+ return;
+ }
+
CRTC_WRITE(PV_INTEN, 0);
}
--- a/drivers/gpu/drm/vc4/vc4_drv.c
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
@@ -292,6 +292,7 @@ static struct platform_driver *const com
&vc4_dpi_driver,
&vc4_hvs_driver,
&vc4_crtc_driver,
+ &vc4_firmware_kms_driver,
&vc4_v3d_driver,
};
--- a/drivers/gpu/drm/vc4/vc4_drv.h
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
@@ -12,6 +12,9 @@
struct vc4_dev {
struct drm_device *dev;
+ bool firmware_kms;
+ struct rpi_firmware *firmware;
+
struct vc4_hdmi *hdmi;
struct vc4_hvs *hvs;
struct vc4_crtc *crtc[3];
@@ -460,6 +463,10 @@ void __iomem *vc4_ioremap_regs(struct pl
extern struct platform_driver vc4_dpi_driver;
int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused);
+/* vc4_firmware_kms.c */
+extern struct platform_driver vc4_firmware_kms_driver;
+void vc4_fkms_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file);
+
/* vc4_gem.c */
void vc4_gem_init(struct drm_device *dev);
void vc4_gem_destroy(struct drm_device *dev);
--- /dev/null
+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
@@ -0,0 +1,660 @@
+/*
+ * Copyright (C) 2016 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 firmware KMS module.
+ *
+ * As a hack to get us from the current closed source driver world
+ * toward a totally open stack, implement KMS on top of the Raspberry
+ * Pi's firmware display stack.
+ */
+
+#include "drm_atomic.h"
+#include "drm_atomic_helper.h"
+#include "drm_plane_helper.h"
+#include "drm_crtc_helper.h"
+#include "linux/clk.h"
+#include "linux/debugfs.h"
+#include "drm_fb_cma_helper.h"
+#include "linux/component.h"
+#include "linux/of_device.h"
+#include "vc4_drv.h"
+#include "vc4_regs.h"
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
+/* The firmware delivers a vblank interrupt to us through the SMI
+ * hardware, which has only this one register.
+ */
+#define SMICS 0x0
+#define SMICS_INTERRUPTS (BIT(9) | BIT(10) | BIT(11))
+
+struct vc4_crtc {
+ struct drm_crtc base;
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+ void __iomem *regs;
+
+ struct drm_pending_vblank_event *event;
+};
+
+static inline struct vc4_crtc *to_vc4_crtc(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct vc4_crtc, base);
+}
+
+struct vc4_fkms_encoder {
+ struct drm_encoder base;
+};
+
+static inline struct vc4_fkms_encoder *
+to_vc4_fkms_encoder(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct vc4_fkms_encoder, base);
+}
+
+/* VC4 FKMS connector KMS struct */
+struct vc4_fkms_connector {
+ struct drm_connector base;
+
+ /* Since the connector is attached to just the one encoder,
+ * this is the reference to it so we can do the best_encoder()
+ * hook.
+ */
+ struct drm_encoder *encoder;
+};
+
+static inline struct vc4_fkms_connector *
+to_vc4_fkms_connector(struct drm_connector *connector)
+{
+ return container_of(connector, struct vc4_fkms_connector, base);
+}
+
+/* Firmware's structure for making an FB mbox call. */
+struct fbinfo_s {
+ u32 xres, yres, xres_virtual, yres_virtual;
+ u32 pitch, bpp;
+ u32 xoffset, yoffset;
+ u32 base;
+ u32 screen_size;
+ u16 cmap[256];
+};
+
+struct vc4_fkms_plane {
+ struct drm_plane base;
+ struct fbinfo_s *fbinfo;
+ dma_addr_t fbinfo_bus_addr;
+ u32 pitch;
+};
+
+static inline struct vc4_fkms_plane *to_vc4_fkms_plane(struct drm_plane *plane)
+{
+ return (struct vc4_fkms_plane *)plane;
+}
+
+/* Turns the display on/off. */
+static int vc4_plane_set_primary_blank(struct drm_plane *plane, bool blank)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
+
+ u32 packet = blank;
+ return rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_FRAMEBUFFER_BLANK,
+ &packet, sizeof(packet));
+}
+
+static void vc4_primary_plane_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
+ struct vc4_fkms_plane *vc4_plane = to_vc4_fkms_plane(plane);
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
+ volatile struct fbinfo_s *fbinfo = vc4_plane->fbinfo;
+ u32 bpp = 32;
+ int ret;
+
+ vc4_plane_set_primary_blank(plane, false);
+
+ fbinfo->xres = state->crtc_w;
+ fbinfo->yres = state->crtc_h;
+ fbinfo->xres_virtual = state->crtc_w;
+ fbinfo->yres_virtual = state->crtc_h;
+ fbinfo->bpp = bpp;
+ fbinfo->xoffset = state->crtc_x;
+ fbinfo->yoffset = state->crtc_y;
+ fbinfo->base = bo->paddr + fb->offsets[0];
+ fbinfo->pitch = fb->pitches[0];
+ /* A bug in the firmware makes it so that if the fb->base is
+ * set to nonzero, the configured pitch gets overwritten with
+ * the previous pitch. So, to get the configured pitch
+ * recomputed, we have to make it allocate itself a new buffer
+ * in VC memory, first.
+ */
+ if (vc4_plane->pitch != fb->pitches[0]) {
+ u32 saved_base = fbinfo->base;
+ fbinfo->base = 0;
+
+ ret = rpi_firmware_transaction(vc4->firmware,
+ RPI_FIRMWARE_CHAN_FB,
+ vc4_plane->fbinfo_bus_addr);
+ fbinfo->base = saved_base;
+
+ vc4_plane->pitch = fbinfo->pitch;
+ WARN_ON_ONCE(vc4_plane->pitch != fb->pitches[0]);
+ }
+
+ ret = rpi_firmware_transaction(vc4->firmware,
+ RPI_FIRMWARE_CHAN_FB,
+ vc4_plane->fbinfo_bus_addr);
+ WARN_ON_ONCE(fbinfo->pitch != fb->pitches[0]);
+ WARN_ON_ONCE(fbinfo->base != bo->paddr + fb->offsets[0]);
+}
+
+static void vc4_primary_plane_atomic_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ vc4_plane_set_primary_blank(plane, true);
+}
+
+static void vc4_cursor_plane_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
+ struct drm_plane_state *state = plane->state;
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_gem_cma_object *bo = drm_fb_cma_get_gem_obj(fb, 0);
+ int ret;
+ u32 packet_state[] = { true, state->crtc_x, state->crtc_y, 0 };
+ u32 packet_info[] = { state->crtc_w, state->crtc_h,
+ 0, /* unused */
+ bo->paddr + fb->offsets[0],
+ 0, 0, /* hotx, hoty */};
+ WARN_ON_ONCE(fb->pitches[0] != state->crtc_w * 4);
+ WARN_ON_ONCE(fb->bits_per_pixel != 32);
+
+ ret = rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_SET_CURSOR_STATE,
+ &packet_state,
+ sizeof(packet_state));
+ if (ret || packet_state[0] != 0)
+ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
+
+ ret = rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_SET_CURSOR_INFO,
+ &packet_info,
+ sizeof(packet_info));
+ if (ret || packet_info[0] != 0)
+ DRM_ERROR("Failed to set cursor info: 0x%08x\n", packet_info[0]);
+}
+
+static void vc4_cursor_plane_atomic_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(plane->dev);
+ u32 packet_state[] = { false, 0, 0, 0 };
+ int ret;
+
+ ret = rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_SET_CURSOR_STATE,
+ &packet_state,
+ sizeof(packet_state));
+ if (ret || packet_state[0] != 0)
+ DRM_ERROR("Failed to set cursor state: 0x%08x\n", packet_state[0]);
+}
+
+static int vc4_plane_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ return 0;
+}
+
+static void vc4_plane_destroy(struct drm_plane *plane)
+{
+ drm_plane_helper_disable(plane);
+ drm_plane_cleanup(plane);
+}
+
+static const struct drm_plane_funcs vc4_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = vc4_plane_destroy,
+ .set_property = NULL,
+ .reset = drm_atomic_helper_plane_reset,
+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static const struct drm_plane_helper_funcs vc4_primary_plane_helper_funcs = {
+ .prepare_fb = NULL,
+ .cleanup_fb = NULL,
+ .atomic_check = vc4_plane_atomic_check,
+ .atomic_update = vc4_primary_plane_atomic_update,
+ .atomic_disable = vc4_primary_plane_atomic_disable,
+};
+
+static const struct drm_plane_helper_funcs vc4_cursor_plane_helper_funcs = {
+ .prepare_fb = NULL,
+ .cleanup_fb = NULL,
+ .atomic_check = vc4_plane_atomic_check,
+ .atomic_update = vc4_cursor_plane_atomic_update,
+ .atomic_disable = vc4_cursor_plane_atomic_disable,
+};
+
+static struct drm_plane *vc4_fkms_plane_init(struct drm_device *dev,
+ enum drm_plane_type type)
+{
+ struct drm_plane *plane = NULL;
+ struct vc4_fkms_plane *vc4_plane;
+ u32 xrgb8888 = DRM_FORMAT_XRGB8888;
+ u32 argb8888 = DRM_FORMAT_ARGB8888;
+ int ret = 0;
+ bool primary = (type == DRM_PLANE_TYPE_PRIMARY);
+
+ vc4_plane = devm_kzalloc(dev->dev, sizeof(*vc4_plane),
+ GFP_KERNEL);
+ if (!vc4_plane) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ plane = &vc4_plane->base;
+ ret = drm_universal_plane_init(dev, plane, 0xff,
+ &vc4_plane_funcs,
+ primary ? &xrgb8888 : &argb8888, 1,
+ type, NULL);
+
+ if (type == DRM_PLANE_TYPE_PRIMARY) {
+ vc4_plane->fbinfo =
+ dma_alloc_coherent(dev->dev,
+ sizeof(*vc4_plane->fbinfo),
+ &vc4_plane->fbinfo_bus_addr,
+ GFP_KERNEL);
+ memset(vc4_plane->fbinfo, 0, sizeof(*vc4_plane->fbinfo));
+
+ drm_plane_helper_add(plane, &vc4_primary_plane_helper_funcs);
+ } else {
+ drm_plane_helper_add(plane, &vc4_cursor_plane_helper_funcs);
+ }
+
+ return plane;
+fail:
+ if (plane)
+ vc4_plane_destroy(plane);
+
+ return ERR_PTR(ret);
+}
+
+static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+ /* Everyting is handled in the planes. */
+}
+
+static void vc4_crtc_disable(struct drm_crtc *crtc)
+{
+}
+
+static void vc4_crtc_enable(struct drm_crtc *crtc)
+{
+}
+
+static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ return 0;
+}
+
+static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_state)
+{
+}
+
+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;
+ drm_crtc_vblank_put(crtc);
+ }
+ 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 = readl(vc4_crtc->regs + SMICS);
+ irqreturn_t ret = IRQ_NONE;
+
+ if (stat & SMICS_INTERRUPTS) {
+ writel(0, vc4_crtc->regs + SMICS);
+ drm_crtc_handle_vblank(&vc4_crtc->base);
+ vc4_crtc_handle_page_flip(vc4_crtc);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static int vc4_page_flip(struct drm_crtc *crtc,
+ struct drm_framebuffer *fb,
+ struct drm_pending_vblank_event *event,
+ uint32_t flags)
+{
+ if (flags & DRM_MODE_PAGE_FLIP_ASYNC) {
+ DRM_ERROR("Async flips aren't allowed\n");
+ return -EINVAL;
+ }
+
+ return drm_atomic_helper_page_flip(crtc, fb, event, flags);
+}
+
+static const struct drm_crtc_funcs vc4_crtc_funcs = {
+ .set_config = drm_atomic_helper_set_config,
+ .destroy = drm_crtc_cleanup,
+ .page_flip = vc4_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_fkms_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) {
+ kfree(&vc4_crtc->event->base);
+ drm_crtc_vblank_put(crtc);
+ vc4_crtc->event = NULL;
+ }
+
+ spin_unlock_irqrestore(&dev->event_lock, flags);
+}
+
+static const struct of_device_id vc4_firmware_kms_dt_match[] = {
+ { .compatible = "raspberrypi,rpi-firmware-kms" },
+ {}
+};
+
+static enum drm_connector_status
+vc4_fkms_connector_detect(struct drm_connector *connector, bool force)
+{
+ return connector_status_connected;
+}
+
+static int vc4_fkms_connector_get_modes(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ u32 wh[2] = {0, 0};
+ int ret;
+ struct drm_display_mode *mode;
+
+ ret = rpi_firmware_property(vc4->firmware,
+ RPI_FIRMWARE_FRAMEBUFFER_GET_PHYSICAL_WIDTH_HEIGHT,
+ &wh, sizeof(wh));
+ if (ret) {
+ DRM_ERROR("Failed to get screen size: %d (0x%08x 0x%08x)\n",
+ ret, wh[0], wh[1]);
+ return 0;
+ }
+
+ mode = drm_cvt_mode(dev, wh[0], wh[1], 60 /* vrefresh */,
+ 0, 0, false);
+ drm_mode_probed_add(connector, mode);
+
+ return 1;
+}
+
+static struct drm_encoder *
+vc4_fkms_connector_best_encoder(struct drm_connector *connector)
+{
+ struct vc4_fkms_connector *fkms_connector =
+ to_vc4_fkms_connector(connector);
+ return fkms_connector->encoder;
+}
+
+static void vc4_fkms_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static const struct drm_connector_funcs vc4_fkms_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = vc4_fkms_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = vc4_fkms_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 const struct drm_connector_helper_funcs vc4_fkms_connector_helper_funcs = {
+ .get_modes = vc4_fkms_connector_get_modes,
+ .best_encoder = vc4_fkms_connector_best_encoder,
+};
+
+static struct drm_connector *vc4_fkms_connector_init(struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ struct drm_connector *connector = NULL;
+ struct vc4_fkms_connector *fkms_connector;
+ int ret = 0;
+
+ fkms_connector = devm_kzalloc(dev->dev, sizeof(*fkms_connector),
+ GFP_KERNEL);
+ if (!fkms_connector) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ connector = &fkms_connector->base;
+
+ fkms_connector->encoder = encoder;
+
+ drm_connector_init(dev, connector, &vc4_fkms_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ drm_connector_helper_add(connector, &vc4_fkms_connector_helper_funcs);
+
+ connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
+ DRM_CONNECTOR_POLL_DISCONNECT);
+
+ connector->interlace_allowed = 0;
+ connector->doublescan_allowed = 0;
+
+ drm_mode_connector_attach_encoder(connector, encoder);
+
+ return connector;
+
+ fail:
+ if (connector)
+ vc4_fkms_connector_destroy(connector);
+
+ return ERR_PTR(ret);
+}
+
+static void vc4_fkms_encoder_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs vc4_fkms_encoder_funcs = {
+ .destroy = vc4_fkms_encoder_destroy,
+};
+
+static void vc4_fkms_encoder_enable(struct drm_encoder *encoder)
+{
+}
+
+static void vc4_fkms_encoder_disable(struct drm_encoder *encoder)
+{
+}
+
+static const struct drm_encoder_helper_funcs vc4_fkms_encoder_helper_funcs = {
+ .enable = vc4_fkms_encoder_enable,
+ .disable = vc4_fkms_encoder_disable,
+};
+
+static int vc4_fkms_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 vc4_fkms_encoder *vc4_encoder;
+ struct drm_crtc *crtc;
+ struct drm_plane *primary_plane, *cursor_plane, *destroy_plane, *temp;
+ struct device_node *firmware_node;
+ int ret;
+
+ vc4->firmware_kms = true;
+
+ vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL);
+ if (!vc4_crtc)
+ return -ENOMEM;
+ crtc = &vc4_crtc->base;
+
+ firmware_node = of_parse_phandle(dev->of_node, "brcm,firmware", 0);
+ vc4->firmware = rpi_firmware_get(firmware_node);
+ if (!vc4->firmware) {
+ DRM_DEBUG("Failed to get Raspberry Pi firmware reference.\n");
+ return -EPROBE_DEFER;
+ }
+ of_node_put(firmware_node);
+
+ /* Map the SMI interrupt reg */
+ 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_fkms_plane_init(drm, DRM_PLANE_TYPE_PRIMARY);
+ if (IS_ERR(primary_plane)) {
+ dev_err(dev, "failed to construct primary plane\n");
+ ret = PTR_ERR(primary_plane);
+ goto err;
+ }
+
+ cursor_plane = vc4_fkms_plane_init(drm, DRM_PLANE_TYPE_CURSOR);
+ if (IS_ERR(cursor_plane)) {
+ dev_err(dev, "failed to construct cursor plane\n");
+ ret = PTR_ERR(cursor_plane);
+ goto err;
+ }
+
+ drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane,
+ &vc4_crtc_funcs, NULL);
+ 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_encoder = devm_kzalloc(dev, sizeof(*vc4_encoder), GFP_KERNEL);
+ if (!vc4_encoder)
+ return -ENOMEM;
+ vc4_crtc->encoder = &vc4_encoder->base;
+ vc4_encoder->base.possible_crtcs |= drm_crtc_mask(crtc) ;
+ drm_encoder_init(drm, &vc4_encoder->base, &vc4_fkms_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS, NULL);
+ drm_encoder_helper_add(&vc4_encoder->base,
+ &vc4_fkms_encoder_helper_funcs);
+
+ vc4_crtc->connector = vc4_fkms_connector_init(drm, &vc4_encoder->base);
+ if (IS_ERR(vc4_crtc->connector)) {
+ ret = PTR_ERR(vc4_crtc->connector);
+ goto err_destroy_encoder;
+ }
+
+ writel(0, vc4_crtc->regs + SMICS);
+ ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
+ vc4_crtc_irq_handler, 0, "vc4 firmware kms",
+ vc4_crtc);
+ if (ret)
+ goto err_destroy_connector;
+
+ platform_set_drvdata(pdev, vc4_crtc);
+
+ return 0;
+
+err_destroy_connector:
+ vc4_fkms_connector_destroy(vc4_crtc->connector);
+err_destroy_encoder:
+ vc4_fkms_encoder_destroy(vc4_crtc->encoder);
+ list_for_each_entry_safe(destroy_plane, temp,
+ &drm->mode_config.plane_list, head) {
+ if (destroy_plane->possible_crtcs == 1 << drm_crtc_index(crtc))
+ destroy_plane->funcs->destroy(destroy_plane);
+ }
+err:
+ return ret;
+}
+
+static void vc4_fkms_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_fkms_connector_destroy(vc4_crtc->connector);
+ vc4_fkms_encoder_destroy(vc4_crtc->encoder);
+ drm_crtc_cleanup(&vc4_crtc->base);
+
+ platform_set_drvdata(pdev, NULL);
+}
+
+static const struct component_ops vc4_fkms_ops = {
+ .bind = vc4_fkms_bind,
+ .unbind = vc4_fkms_unbind,
+};
+
+static int vc4_fkms_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &vc4_fkms_ops);
+}
+
+static int vc4_fkms_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &vc4_fkms_ops);
+ return 0;
+}
+
+struct platform_driver vc4_firmware_kms_driver = {
+ .probe = vc4_fkms_probe,
+ .remove = vc4_fkms_remove,
+ .driver = {
+ .name = "vc4_firmware_kms",
+ .of_match_table = vc4_firmware_kms_dt_match,
+ },
+};
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