--- /dev/null
+From 3ddc9f2dc424c085ca646e92b40d156bb5318295 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 | 17 +
+ drivers/gpu/drm/vc4/vc4_drv.c | 1 +
+ drivers/gpu/drm/vc4/vc4_drv.h | 7 +
+ drivers/gpu/drm/vc4/vc4_firmware_kms.c | 656 +++++++++++++++++++++++++
+ 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
+@@ -9,6 +9,7 @@ vc4-y := \
+ vc4_dpi.o \
+ vc4_dsi.o \
+ vc4_fence.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
+@@ -133,6 +133,9 @@ bool vc4_crtc_get_scanoutpos(struct drm_
+ int vblank_lines;
+ bool ret = false;
+
++ if (vc4->firmware_kms)
++ return 0;
++
+ /* preempt_disable_rt() should go right here in PREEMPT_RT patchset. */
+
+ /* Get optional system timestamp before query. */
+@@ -761,8 +764,15 @@ static void vc4_crtc_atomic_flush(struct
+
+ static int vc4_enable_vblank(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);
+
++ if (vc4->firmware_kms) {
++ /* XXX: Can we mask the SMI interrupt? */
++ return 0;
++ }
++
+ CRTC_WRITE(PV_INTEN, PV_INT_VFP_START);
+
+ return 0;
+@@ -770,8 +780,15 @@ static int vc4_enable_vblank(struct drm_
+
+ static void vc4_disable_vblank(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);
+
++ 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
+@@ -347,6 +347,7 @@ static struct platform_driver *const com
+ &vc4_txp_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
+@@ -67,6 +67,9 @@ struct vc4_perfmon {
+ struct vc4_dev {
+ struct drm_device *dev;
+
++ bool firmware_kms;
++ struct rpi_firmware *firmware;
++
+ struct vc4_hdmi *hdmi;
+ struct vc4_hvs *hvs;
+ struct vc4_v3d *v3d;
+@@ -719,6 +722,10 @@ int vc4_dsi_debugfs_regs(struct seq_file
+ /* vc4_fence.c */
+ extern const struct dma_fence_ops vc4_fence_ops;
+
++/* 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 +1,656 @@
++/*
++ * 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/drm_atomic_helper.h"
++#include "drm/drm_plane_helper.h"
++#include "drm/drm_crtc_helper.h"
++#include "linux/clk.h"
++#include "linux/debugfs.h"
++#include "drm/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);
++
++ 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, NULL,
++ 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, struct drm_crtc_state *old_state)
++{
++}
++
++static void vc4_crtc_enable(struct drm_crtc *crtc, struct drm_crtc_state *old_state)
++{
++}
++
++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, struct drm_modeset_acquire_ctx *ctx)
++{
++ 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, ctx);
++}
++
++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,
++ .atomic_disable = vc4_crtc_disable,
++ .atomic_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 = {
++ .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_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,
++ },
++};
projects / openwrt / staging / dedeckeh.git / blobdiff