drm/vc4: Add KMS support for Raspberry Pi.
This is enough for fbcon and bringing up X using
xf86-video-modesetting. It doesn't support the 3D accelerator or
power management yet.
v2: Drop FB_HELPER select thanks to Archit's patches. Do manual init
ordering instead of using the .load hook. Structure registration
more like tegra's, but still using the typical "component" code.
Drop no-op hooks for atomic_begin and mode_fixup() now that
they're optional. Drop sentinel in Makefile. Fix minor style
nits I noticed on another reread.
v3: Use the new bcm2835 clk driver to manage pixel/HSM clocks instead
of having a fixed video mode. Use exynos-style component driver
matching instead of devicetree nodes to list the component driver
instances. Rename compatibility strings to say bcm2835, and
distinguish pv0/1/2. Clean up some h/vsync code, and add in
interlaced mode setup. Fix up probe/bind error paths. Use
bitops.h macros for vc4_regs.h
v4: Include i2c.h, allow building under COMPILE_TEST, drop msleep now
that other bugs have been fixed, add timeouts to cpu_relax()
loops, rename hpd-gpio to hpd-gpios.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
new file mode 100644
index 0000000..da9a36d
--- /dev/null
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -0,0 +1,590 @@
+/*
+ * Copyright (C) 2015 Broadcom
+ * Copyright (c) 2014 The Linux Foundation. All rights reserved.
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * DOC: VC4 Falcon HDMI module
+ *
+ * The HDMI core has a state machine and a PHY. Most of the unit
+ * operates off of the HSM clock from CPRMAN. It also internally uses
+ * the PLLH_PIX clock for the PHY.
+ */
+
+#include "drm_atomic_helper.h"
+#include "drm_crtc_helper.h"
+#include "drm_edid.h"
+#include "linux/clk.h"
+#include "linux/component.h"
+#include "linux/i2c.h"
+#include "linux/of_gpio.h"
+#include "linux/of_platform.h"
+#include "vc4_drv.h"
+#include "vc4_regs.h"
+
+/* General HDMI hardware state. */
+struct vc4_hdmi {
+ struct platform_device *pdev;
+
+ struct drm_encoder *encoder;
+ struct drm_connector *connector;
+
+ struct i2c_adapter *ddc;
+ void __iomem *hdmicore_regs;
+ void __iomem *hd_regs;
+ int hpd_gpio;
+
+ struct clk *pixel_clock;
+ struct clk *hsm_clock;
+};
+
+#define HDMI_READ(offset) readl(vc4->hdmi->hdmicore_regs + offset)
+#define HDMI_WRITE(offset, val) writel(val, vc4->hdmi->hdmicore_regs + offset)
+#define HD_READ(offset) readl(vc4->hdmi->hd_regs + offset)
+#define HD_WRITE(offset, val) writel(val, vc4->hdmi->hd_regs + offset)
+
+/* VC4 HDMI encoder KMS struct */
+struct vc4_hdmi_encoder {
+ struct vc4_encoder base;
+ bool hdmi_monitor;
+};
+
+static inline struct vc4_hdmi_encoder *
+to_vc4_hdmi_encoder(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct vc4_hdmi_encoder, base.base);
+}
+
+/* VC4 HDMI connector KMS struct */
+struct vc4_hdmi_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_hdmi_connector *
+to_vc4_hdmi_connector(struct drm_connector *connector)
+{
+ return container_of(connector, struct vc4_hdmi_connector, base);
+}
+
+#define HDMI_REG(reg) { reg, #reg }
+static const struct {
+ u32 reg;
+ const char *name;
+} hdmi_regs[] = {
+ HDMI_REG(VC4_HDMI_CORE_REV),
+ HDMI_REG(VC4_HDMI_SW_RESET_CONTROL),
+ HDMI_REG(VC4_HDMI_HOTPLUG_INT),
+ HDMI_REG(VC4_HDMI_HOTPLUG),
+ HDMI_REG(VC4_HDMI_HORZA),
+ HDMI_REG(VC4_HDMI_HORZB),
+ HDMI_REG(VC4_HDMI_FIFO_CTL),
+ HDMI_REG(VC4_HDMI_SCHEDULER_CONTROL),
+ HDMI_REG(VC4_HDMI_VERTA0),
+ HDMI_REG(VC4_HDMI_VERTA1),
+ HDMI_REG(VC4_HDMI_VERTB0),
+ HDMI_REG(VC4_HDMI_VERTB1),
+ HDMI_REG(VC4_HDMI_TX_PHY_RESET_CTL),
+};
+
+static const struct {
+ u32 reg;
+ const char *name;
+} hd_regs[] = {
+ HDMI_REG(VC4_HD_M_CTL),
+ HDMI_REG(VC4_HD_MAI_CTL),
+ HDMI_REG(VC4_HD_VID_CTL),
+ HDMI_REG(VC4_HD_CSC_CTL),
+ HDMI_REG(VC4_HD_FRAME_COUNT),
+};
+
+#ifdef CONFIG_DEBUG_FS
+int vc4_hdmi_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(hdmi_regs); i++) {
+ seq_printf(m, "%s (0x%04x): 0x%08x\n",
+ hdmi_regs[i].name, hdmi_regs[i].reg,
+ HDMI_READ(hdmi_regs[i].reg));
+ }
+
+ for (i = 0; i < ARRAY_SIZE(hd_regs); i++) {
+ seq_printf(m, "%s (0x%04x): 0x%08x\n",
+ hd_regs[i].name, hd_regs[i].reg,
+ HD_READ(hd_regs[i].reg));
+ }
+
+ return 0;
+}
+#endif /* CONFIG_DEBUG_FS */
+
+static void vc4_hdmi_dump_regs(struct drm_device *dev)
+{
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hdmi_regs); i++) {
+ DRM_INFO("0x%04x (%s): 0x%08x\n",
+ hdmi_regs[i].reg, hdmi_regs[i].name,
+ HDMI_READ(hdmi_regs[i].reg));
+ }
+ for (i = 0; i < ARRAY_SIZE(hd_regs); i++) {
+ DRM_INFO("0x%04x (%s): 0x%08x\n",
+ hd_regs[i].reg, hd_regs[i].name,
+ HD_READ(hd_regs[i].reg));
+ }
+}
+
+static enum drm_connector_status
+vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct drm_device *dev = connector->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+
+ if (vc4->hdmi->hpd_gpio) {
+ if (gpio_get_value(vc4->hdmi->hpd_gpio))
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+ }
+
+ if (HDMI_READ(VC4_HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED)
+ return connector_status_connected;
+ else
+ return connector_status_disconnected;
+}
+
+static void vc4_hdmi_connector_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+ struct vc4_hdmi_connector *vc4_connector =
+ to_vc4_hdmi_connector(connector);
+ struct drm_encoder *encoder = vc4_connector->encoder;
+ struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
+ struct drm_device *dev = connector->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ int ret = 0;
+ struct edid *edid;
+
+ edid = drm_get_edid(connector, vc4->hdmi->ddc);
+ if (!edid)
+ return -ENODEV;
+
+ vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
+ drm_mode_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+
+ return ret;
+}
+
+static struct drm_encoder *
+vc4_hdmi_connector_best_encoder(struct drm_connector *connector)
+{
+ struct vc4_hdmi_connector *hdmi_connector =
+ to_vc4_hdmi_connector(connector);
+ return hdmi_connector->encoder;
+}
+
+static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
+ .dpms = drm_atomic_helper_connector_dpms,
+ .detect = vc4_hdmi_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = vc4_hdmi_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_hdmi_connector_helper_funcs = {
+ .get_modes = vc4_hdmi_connector_get_modes,
+ .best_encoder = vc4_hdmi_connector_best_encoder,
+};
+
+static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
+ struct drm_encoder *encoder)
+{
+ struct drm_connector *connector = NULL;
+ struct vc4_hdmi_connector *hdmi_connector;
+ int ret = 0;
+
+ hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
+ GFP_KERNEL);
+ if (!hdmi_connector) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ connector = &hdmi_connector->base;
+
+ hdmi_connector->encoder = encoder;
+
+ drm_connector_init(dev, connector, &vc4_hdmi_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ drm_connector_helper_add(connector, &vc4_hdmi_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_hdmi_connector_destroy(connector);
+
+ return ERR_PTR(ret);
+}
+
+static void vc4_hdmi_encoder_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs vc4_hdmi_encoder_funcs = {
+ .destroy = vc4_hdmi_encoder_destroy,
+};
+
+static void vc4_hdmi_encoder_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *unadjusted_mode,
+ struct drm_display_mode *mode)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ bool debug_dump_regs = false;
+ bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
+ bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
+ u32 vactive = (mode->vdisplay >>
+ ((mode->flags & DRM_MODE_FLAG_INTERLACE) ? 1 : 0));
+ u32 verta = (VC4_SET_FIELD(mode->vsync_end - mode->vsync_start,
+ VC4_HDMI_VERTA_VSP) |
+ VC4_SET_FIELD(mode->vsync_start - mode->vdisplay,
+ VC4_HDMI_VERTA_VFP) |
+ VC4_SET_FIELD(vactive, VC4_HDMI_VERTA_VAL));
+ u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
+ VC4_SET_FIELD(mode->vtotal - mode->vsync_end,
+ VC4_HDMI_VERTB_VBP));
+
+ if (debug_dump_regs) {
+ DRM_INFO("HDMI regs before:\n");
+ vc4_hdmi_dump_regs(dev);
+ }
+
+ HD_WRITE(VC4_HD_VID_CTL, 0);
+
+ clk_set_rate(vc4->hdmi->pixel_clock, mode->clock * 1000);
+
+ HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
+ HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
+ VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
+ VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
+
+ HDMI_WRITE(VC4_HDMI_HORZA,
+ (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
+ (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
+ VC4_SET_FIELD(mode->hdisplay, VC4_HDMI_HORZA_HAP));
+
+ HDMI_WRITE(VC4_HDMI_HORZB,
+ VC4_SET_FIELD(mode->htotal - mode->hsync_end,
+ VC4_HDMI_HORZB_HBP) |
+ VC4_SET_FIELD(mode->hsync_end - mode->hsync_start,
+ VC4_HDMI_HORZB_HSP) |
+ VC4_SET_FIELD(mode->hsync_start - mode->hdisplay,
+ VC4_HDMI_HORZB_HFP));
+
+ HDMI_WRITE(VC4_HDMI_VERTA0, verta);
+ HDMI_WRITE(VC4_HDMI_VERTA1, verta);
+
+ HDMI_WRITE(VC4_HDMI_VERTB0, vertb);
+ HDMI_WRITE(VC4_HDMI_VERTB1, vertb);
+
+ HD_WRITE(VC4_HD_VID_CTL,
+ (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
+ (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
+
+ /* The RGB order applies even when CSC is disabled. */
+ HD_WRITE(VC4_HD_CSC_CTL, VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
+ VC4_HD_CSC_CTL_ORDER));
+
+ HDMI_WRITE(VC4_HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
+
+ if (debug_dump_regs) {
+ DRM_INFO("HDMI regs after:\n");
+ vc4_hdmi_dump_regs(dev);
+ }
+}
+
+static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
+{
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+
+ HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
+ HD_WRITE(VC4_HD_VID_CTL,
+ HD_READ(VC4_HD_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
+}
+
+static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
+{
+ struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
+ struct drm_device *dev = encoder->dev;
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
+ int ret;
+
+ HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0);
+
+ HD_WRITE(VC4_HD_VID_CTL,
+ HD_READ(VC4_HD_VID_CTL) |
+ VC4_HD_VID_CTL_ENABLE |
+ VC4_HD_VID_CTL_UNDERFLOW_ENABLE |
+ VC4_HD_VID_CTL_FRAME_COUNTER_RESET);
+
+ if (vc4_encoder->hdmi_monitor) {
+ HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
+ HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
+ VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
+
+ ret = wait_for(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
+ VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1);
+ WARN_ONCE(ret, "Timeout waiting for "
+ "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
+ } else {
+ HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
+ HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
+ ~(VC4_HDMI_RAM_PACKET_ENABLE));
+ HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
+ HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
+ ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
+
+ ret = wait_for(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
+ VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1);
+ WARN_ONCE(ret, "Timeout waiting for "
+ "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
+ }
+
+ if (vc4_encoder->hdmi_monitor) {
+ u32 drift;
+
+ WARN_ON(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
+ VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE));
+ HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
+ HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
+ VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
+
+ /* XXX: Set HDMI_RAM_PACKET_CONFIG (1 << 16) and set
+ * up the infoframe.
+ */
+
+ drift = HDMI_READ(VC4_HDMI_FIFO_CTL);
+ drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
+
+ HDMI_WRITE(VC4_HDMI_FIFO_CTL,
+ drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
+ HDMI_WRITE(VC4_HDMI_FIFO_CTL,
+ drift | VC4_HDMI_FIFO_CTL_RECENTER);
+ udelay(1000);
+ HDMI_WRITE(VC4_HDMI_FIFO_CTL,
+ drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
+ HDMI_WRITE(VC4_HDMI_FIFO_CTL,
+ drift | VC4_HDMI_FIFO_CTL_RECENTER);
+
+ ret = wait_for(HDMI_READ(VC4_HDMI_FIFO_CTL) &
+ VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
+ WARN_ONCE(ret, "Timeout waiting for "
+ "VC4_HDMI_FIFO_CTL_RECENTER_DONE");
+ }
+}
+
+static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
+ .mode_set = vc4_hdmi_encoder_mode_set,
+ .disable = vc4_hdmi_encoder_disable,
+ .enable = vc4_hdmi_encoder_enable,
+};
+
+static int vc4_hdmi_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_hdmi *hdmi;
+ struct vc4_hdmi_encoder *vc4_hdmi_encoder;
+ struct device_node *ddc_node;
+ u32 value;
+ int ret;
+
+ hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
+ if (!hdmi)
+ return -ENOMEM;
+
+ vc4_hdmi_encoder = devm_kzalloc(dev, sizeof(*vc4_hdmi_encoder),
+ GFP_KERNEL);
+ if (!vc4_hdmi_encoder)
+ return -ENOMEM;
+ vc4_hdmi_encoder->base.type = VC4_ENCODER_TYPE_HDMI;
+ hdmi->encoder = &vc4_hdmi_encoder->base.base;
+
+ hdmi->pdev = pdev;
+ hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
+ if (IS_ERR(hdmi->hdmicore_regs))
+ return PTR_ERR(hdmi->hdmicore_regs);
+
+ hdmi->hd_regs = vc4_ioremap_regs(pdev, 1);
+ if (IS_ERR(hdmi->hd_regs))
+ return PTR_ERR(hdmi->hd_regs);
+
+ ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
+ if (!ddc_node) {
+ DRM_ERROR("Failed to find ddc node in device tree\n");
+ return -ENODEV;
+ }
+
+ hdmi->pixel_clock = devm_clk_get(dev, "pixel");
+ if (IS_ERR(hdmi->pixel_clock)) {
+ DRM_ERROR("Failed to get pixel clock\n");
+ return PTR_ERR(hdmi->pixel_clock);
+ }
+ hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
+ if (IS_ERR(hdmi->hsm_clock)) {
+ DRM_ERROR("Failed to get HDMI state machine clock\n");
+ return PTR_ERR(hdmi->hsm_clock);
+ }
+
+ hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
+ if (!hdmi->ddc) {
+ DRM_DEBUG("Failed to get ddc i2c adapter by node\n");
+ return -EPROBE_DEFER;
+ }
+
+ /* Enable the clocks at startup. We can't quite recover from
+ * turning off the pixel clock during disable/enables yet, so
+ * it's always running.
+ */
+ ret = clk_prepare_enable(hdmi->pixel_clock);
+ if (ret) {
+ DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
+ goto err_put_i2c;
+ }
+
+ ret = clk_prepare_enable(hdmi->hsm_clock);
+ if (ret) {
+ DRM_ERROR("Failed to turn on HDMI state machine clock: %d\n",
+ ret);
+ goto err_unprepare_pix;
+ }
+
+ /* Only use the GPIO HPD pin if present in the DT, otherwise
+ * we'll use the HDMI core's register.
+ */
+ if (of_find_property(dev->of_node, "hpd-gpios", &value)) {
+ hdmi->hpd_gpio = of_get_named_gpio(dev->of_node, "hpd-gpios", 0);
+ if (hdmi->hpd_gpio < 0) {
+ ret = hdmi->hpd_gpio;
+ goto err_unprepare_hsm;
+ }
+ }
+
+ vc4->hdmi = hdmi;
+
+ /* HDMI core must be enabled. */
+ WARN_ON_ONCE((HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE) == 0);
+
+ drm_encoder_init(drm, hdmi->encoder, &vc4_hdmi_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS);
+ drm_encoder_helper_add(hdmi->encoder, &vc4_hdmi_encoder_helper_funcs);
+
+ hdmi->connector = vc4_hdmi_connector_init(drm, hdmi->encoder);
+ if (IS_ERR(hdmi->connector)) {
+ ret = PTR_ERR(hdmi->connector);
+ goto err_destroy_encoder;
+ }
+
+ return 0;
+
+err_destroy_encoder:
+ vc4_hdmi_encoder_destroy(hdmi->encoder);
+err_unprepare_hsm:
+ clk_disable_unprepare(hdmi->hsm_clock);
+err_unprepare_pix:
+ clk_disable_unprepare(hdmi->pixel_clock);
+err_put_i2c:
+ put_device(&vc4->hdmi->ddc->dev);
+
+ return ret;
+}
+
+static void vc4_hdmi_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct drm_device *drm = dev_get_drvdata(master);
+ struct vc4_dev *vc4 = drm->dev_private;
+ struct vc4_hdmi *hdmi = vc4->hdmi;
+
+ vc4_hdmi_connector_destroy(hdmi->connector);
+ vc4_hdmi_encoder_destroy(hdmi->encoder);
+
+ clk_disable_unprepare(hdmi->pixel_clock);
+ clk_disable_unprepare(hdmi->hsm_clock);
+ put_device(&hdmi->ddc->dev);
+
+ vc4->hdmi = NULL;
+}
+
+static const struct component_ops vc4_hdmi_ops = {
+ .bind = vc4_hdmi_bind,
+ .unbind = vc4_hdmi_unbind,
+};
+
+static int vc4_hdmi_dev_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &vc4_hdmi_ops);
+}
+
+static int vc4_hdmi_dev_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &vc4_hdmi_ops);
+ return 0;
+}
+
+static const struct of_device_id vc4_hdmi_dt_match[] = {
+ { .compatible = "brcm,bcm2835-hdmi" },
+ {}
+};
+
+struct platform_driver vc4_hdmi_driver = {
+ .probe = vc4_hdmi_dev_probe,
+ .remove = vc4_hdmi_dev_remove,
+ .driver = {
+ .name = "vc4_hdmi",
+ .of_match_table = vc4_hdmi_dt_match,
+ },
+};