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Message-Id: <b7ef05362af4127a90af31bf17a37f98b71eff1e.1590982881.git.Sandor.yu@nxp.com>
Date: Mon, 1 Jun 2020 14:17:35 +0800
From: sandor.yu@....com
To: a.hajda@...sung.com, narmstrong@...libre.com,
Laurent.pinchart@...asonboard.com, jonas@...boo.se,
jernej.skrabec@...l.net, heiko@...ech.de, hjc@...k-chips.com,
Sandor.yu@....com, dkos@...ence.com,
dri-devel@...ts.freedesktop.org
Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-imx@....com
Subject: [PATCH 5/7] drm: bridge: cadence: Initial support for MHDP HDMI bridge driver
From: Sandor Yu <Sandor.yu@....com>
This adds initial support for cadence MHDP HDMI bridge driver.
Basic HDMI functions are supported, that include:
-Video mode set on-the-fly
-Cable hotplug detect
-MAX support resolution to 3096x2160@...ps
-HDMI audio
-AV infoframe
-EDID read
-SCDC read
Signed-off-by: Sandor Yu <Sandor.yu@....com>
---
drivers/gpu/drm/bridge/cadence/Kconfig | 4 +
drivers/gpu/drm/bridge/cadence/Makefile | 3 +-
.../gpu/drm/bridge/cadence/cdns-hdmi-core.c | 600 ++++++++++++++++++
.../gpu/drm/bridge/cadence/cdns-mhdp-common.h | 14 +
.../gpu/drm/bridge/cadence/cdns-mhdp-hdmi.c | 330 ++++++++++
include/drm/bridge/cdns-mhdp.h | 69 ++
6 files changed, 1019 insertions(+), 1 deletion(-)
create mode 100644 drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
create mode 100644 drivers/gpu/drm/bridge/cadence/cdns-mhdp-hdmi.c
diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig b/drivers/gpu/drm/bridge/cadence/Kconfig
index b7b8d30b18b6..9bc098302837 100644
--- a/drivers/gpu/drm/bridge/cadence/Kconfig
+++ b/drivers/gpu/drm/bridge/cadence/Kconfig
@@ -9,3 +9,7 @@ config DRM_CDNS_MHDP
config DRM_CDNS_DP
tristate "Cadence DP DRM driver"
depends on DRM_CDNS_MHDP
+
+config DRM_CDNS_HDMI
+ tristate "Cadence HDMI DRM driver"
+ depends on DRM_CDNS_MHDP
diff --git a/drivers/gpu/drm/bridge/cadence/Makefile b/drivers/gpu/drm/bridge/cadence/Makefile
index cb3c88311a64..1d60166c2bf5 100644
--- a/drivers/gpu/drm/bridge/cadence/Makefile
+++ b/drivers/gpu/drm/bridge/cadence/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
-cdns_mhdp_drmcore-y := cdns-mhdp-common.o cdns-mhdp-audio.o cdns-mhdp-dp.o
+cdns_mhdp_drmcore-y := cdns-mhdp-common.o cdns-mhdp-audio.o cdns-mhdp-dp.o cdns-mhdp-hdmi.o
cdns_mhdp_drmcore-$(CONFIG_DRM_CDNS_DP) += cdns-dp-core.o
+cdns_mhdp_drmcore-$(CONFIG_DRM_CDNS_HDMI) += cdns-hdmi-core.o
obj-$(CONFIG_DRM_CDNS_MHDP) += cdns_mhdp_drmcore.o
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
new file mode 100644
index 000000000000..5775ed21b734
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
@@ -0,0 +1,600 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cadence High-Definition Multimedia Interface (HDMI) driver
+ *
+ * Copyright (C) 2019-2020 NXP Semiconductor, Inc.
+ *
+ */
+#include <drm/bridge/cdns-mhdp.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_print.h>
+#include <drm/drm_scdc_helper.h>
+#include <drm/drm_vblank.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/hdmi.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+
+#include "cdns-mhdp-common.h"
+
+static void hdmi_sink_config(struct cdns_mhdp_device *mhdp)
+{
+ struct drm_scdc *scdc = &mhdp->connector.base.display_info.hdmi.scdc;
+ u8 buff = 0;
+
+ /* Default work in HDMI1.4 */
+ mhdp->hdmi.hdmi_type = MODE_HDMI_1_4;
+
+ /* check sink support SCDC or not */
+ if (scdc->supported != true) {
+ DRM_INFO("Sink Not Support SCDC\n");
+ return;
+ }
+
+ if (mhdp->hdmi.char_rate > 340000) {
+ /*
+ * TMDS Character Rate above 340MHz should working in HDMI2.0
+ * Enable scrambling and TMDS_Bit_Clock_Ratio
+ */
+ buff = SCDC_TMDS_BIT_CLOCK_RATIO_BY_40 | SCDC_SCRAMBLING_ENABLE;
+ mhdp->hdmi.hdmi_type = MODE_HDMI_2_0;
+ } else if (scdc->scrambling.low_rates) {
+ /*
+ * Enable scrambling and HDMI2.0 when scrambling capability of sink
+ * be indicated in the HF-VSDB LTE_340Mcsc_scramble bit
+ */
+ buff = SCDC_SCRAMBLING_ENABLE;
+ mhdp->hdmi.hdmi_type = MODE_HDMI_2_0;
+ }
+
+ /* TMDS config */
+ cdns_hdmi_scdc_write(mhdp, SCDC_TMDS_CONFIG, buff);
+}
+
+static void hdmi_lanes_config(struct cdns_mhdp_device *mhdp)
+{
+ u32 lane_mapping = mhdp->plat_data->lane_mapping;
+ /* Line swaping */
+ cdns_mhdp_reg_write(mhdp, LANES_CONFIG, 0x00400000 | lane_mapping);
+}
+
+static int hdmi_avi_info_set(struct cdns_mhdp_device *mhdp,
+ struct drm_display_mode *mode)
+{
+ struct hdmi_avi_infoframe frame;
+ int format = mhdp->video_info.color_fmt;
+ struct drm_connector_state *conn_state = mhdp->connector.base.state;
+ struct drm_display_mode *adj_mode;
+ enum hdmi_quantization_range qr;
+ u8 buf[32];
+ int ret;
+
+ /* Initialise info frame from DRM mode */
+ drm_hdmi_avi_infoframe_from_display_mode(&frame,
+ &mhdp->connector.base, mode);
+
+ switch (format) {
+ case YCBCR_4_4_4:
+ frame.colorspace = HDMI_COLORSPACE_YUV444;
+ break;
+ case YCBCR_4_2_2:
+ frame.colorspace = HDMI_COLORSPACE_YUV422;
+ break;
+ case YCBCR_4_2_0:
+ frame.colorspace = HDMI_COLORSPACE_YUV420;
+ break;
+ default:
+ frame.colorspace = HDMI_COLORSPACE_RGB;
+ break;
+ }
+
+ drm_hdmi_avi_infoframe_colorspace(&frame, conn_state);
+
+ adj_mode = &mhdp->bridge.base.encoder->crtc->state->adjusted_mode;
+
+ qr = drm_default_rgb_quant_range(adj_mode);
+
+ drm_hdmi_avi_infoframe_quant_range(&frame, &mhdp->connector.base,
+ adj_mode, qr);
+
+ ret = hdmi_avi_infoframe_check(&frame);
+ if (WARN_ON(ret))
+ return false;
+
+ ret = hdmi_avi_infoframe_pack(&frame, buf + 1, sizeof(buf) - 1);
+ if (ret < 0) {
+ DRM_ERROR("failed to pack AVI infoframe: %d\n", ret);
+ return -1;
+ }
+
+ buf[0] = 0;
+ cdns_mhdp_infoframe_set(mhdp, 0, sizeof(buf), buf, HDMI_INFOFRAME_TYPE_AVI);
+ return 0;
+}
+
+static void hdmi_vendor_info_set(struct cdns_mhdp_device *mhdp,
+ struct drm_display_mode *mode)
+{
+ struct hdmi_vendor_infoframe frame;
+ u8 buf[32];
+ int ret;
+
+ /* Initialise vendor frame from DRM mode */
+ ret = drm_hdmi_vendor_infoframe_from_display_mode(&frame, &mhdp->connector.base, mode);
+ if (ret < 0) {
+ DRM_INFO("No vendor infoframe\n");
+ return;
+ }
+
+ ret = hdmi_vendor_infoframe_pack(&frame, buf + 1, sizeof(buf) - 1);
+ if (ret < 0) {
+ DRM_WARN("Unable to pack vendor infoframe: %d\n", ret);
+ return;
+ }
+
+ buf[0] = 0;
+ cdns_mhdp_infoframe_set(mhdp, 3, sizeof(buf), buf, HDMI_INFOFRAME_TYPE_VENDOR);
+}
+
+static void hdmi_drm_info_set(struct cdns_mhdp_device *mhdp)
+{
+ struct drm_connector_state *conn_state;
+ struct hdmi_drm_infoframe frame;
+ u8 buf[32];
+ int ret;
+
+ conn_state = mhdp->connector.base.state;
+
+ if (!conn_state->hdr_output_metadata)
+ return;
+
+ ret = drm_hdmi_infoframe_set_hdr_metadata(&frame, conn_state);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("couldn't set HDR metadata in infoframe\n");
+ return;
+ }
+
+ ret = hdmi_drm_infoframe_pack(&frame, buf + 1, sizeof(buf) - 1);
+ if (ret < 0) {
+ DRM_DEBUG_KMS("couldn't pack HDR infoframe\n");
+ return;
+ }
+
+ buf[0] = 0;
+ cdns_mhdp_infoframe_set(mhdp, 3, sizeof(buf), buf, HDMI_INFOFRAME_TYPE_DRM);
+}
+
+void cdns_hdmi_mode_set(struct cdns_mhdp_device *mhdp)
+{
+ struct drm_display_mode *mode = &mhdp->mode;
+ int ret;
+
+ /* video mode check */
+ if (mode->clock == 0 || mode->hdisplay == 0 || mode->vdisplay == 0)
+ return;
+
+ hdmi_lanes_config(mhdp);
+
+ cdns_mhdp_plat_call(mhdp, pclk_rate);
+
+ /* Delay for HDMI FW stable after pixel clock relock */
+ msleep(20);
+
+ cdns_mhdp_plat_call(mhdp, phy_set);
+
+ hdmi_sink_config(mhdp);
+
+ ret = cdns_hdmi_ctrl_init(mhdp, mhdp->hdmi.hdmi_type, mhdp->hdmi.char_rate);
+ if (ret < 0) {
+ DRM_ERROR("%s, ret = %d\n", __func__, ret);
+ return;
+ }
+
+ /* Config GCP */
+ if (mhdp->video_info.color_depth == 8)
+ cdns_hdmi_disable_gcp(mhdp);
+ else
+ cdns_hdmi_enable_gcp(mhdp);
+
+ ret = hdmi_avi_info_set(mhdp, mode);
+ if (ret < 0) {
+ DRM_ERROR("%s ret = %d\n", __func__, ret);
+ return;
+ }
+
+ /* vendor info frame is enabled only for HDMI1.4 4K mode */
+ hdmi_vendor_info_set(mhdp, mode);
+
+ hdmi_drm_info_set(mhdp);
+
+ ret = cdns_hdmi_mode_config(mhdp, mode, &mhdp->video_info);
+ if (ret < 0) {
+ DRM_ERROR("CDN_API_HDMITX_SetVic_blocking ret = %d\n", ret);
+ return;
+ }
+}
+
+static enum drm_connector_status
+cdns_hdmi_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct cdns_mhdp_device *mhdp =
+ container_of(connector, struct cdns_mhdp_device, connector.base);
+ u8 hpd = 0xf;
+
+ hpd = cdns_mhdp_read_hpd(mhdp);
+ if (hpd == 1)
+ return connector_status_connected;
+ else if (hpd == 0)
+ return connector_status_disconnected;
+ else {
+ DRM_INFO("Unknow cable status, hdp=%u\n", hpd);
+ return connector_status_unknown;
+ }
+}
+
+static int cdns_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+ struct cdns_mhdp_device *mhdp =
+ container_of(connector, struct cdns_mhdp_device, connector.base);
+ int num_modes = 0;
+ struct edid *edid;
+
+ edid = drm_do_get_edid(&mhdp->connector.base,
+ cdns_hdmi_get_edid_block, mhdp);
+ if (edid) {
+ dev_info(mhdp->dev, "%x,%x,%x,%x,%x,%x,%x,%x\n",
+ edid->header[0], edid->header[1],
+ edid->header[2], edid->header[3],
+ edid->header[4], edid->header[5],
+ edid->header[6], edid->header[7]);
+ drm_connector_update_edid_property(connector, edid);
+ num_modes = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+ }
+
+ if (num_modes == 0)
+ DRM_ERROR("Invalid edid\n");
+ return num_modes;
+}
+
+static bool blob_equal(const struct drm_property_blob *a,
+ const struct drm_property_blob *b)
+{
+ if (a && b)
+ return a->length == b->length &&
+ !memcmp(a->data, b->data, a->length);
+
+ return !a == !b;
+}
+
+static int cdns_hdmi_connector_atomic_check(struct drm_connector *connector,
+ struct drm_atomic_state *state)
+{
+ struct drm_connector_state *new_con_state =
+ drm_atomic_get_new_connector_state(state, connector);
+ struct drm_connector_state *old_con_state =
+ drm_atomic_get_old_connector_state(state, connector);
+ struct drm_crtc *crtc = new_con_state->crtc;
+ struct drm_crtc_state *new_crtc_state;
+
+ if (!blob_equal(new_con_state->hdr_output_metadata,
+ old_con_state->hdr_output_metadata) ||
+ new_con_state->colorspace != old_con_state->colorspace) {
+ new_crtc_state = drm_atomic_get_crtc_state(state, crtc);
+ if (IS_ERR(new_crtc_state))
+ return PTR_ERR(new_crtc_state);
+
+ new_crtc_state->mode_changed =
+ !new_con_state->hdr_output_metadata ||
+ !old_con_state->hdr_output_metadata ||
+ new_con_state->colorspace != old_con_state->colorspace;
+ }
+
+ return 0;
+}
+
+static const struct drm_connector_funcs cdns_hdmi_connector_funcs = {
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .detect = cdns_hdmi_connector_detect,
+ .destroy = drm_connector_cleanup,
+ .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 cdns_hdmi_connector_helper_funcs = {
+ .get_modes = cdns_hdmi_connector_get_modes,
+ .atomic_check = cdns_hdmi_connector_atomic_check,
+};
+
+static int cdns_hdmi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct cdns_mhdp_device *mhdp = bridge->driver_private;
+ struct drm_mode_config *config = &bridge->dev->mode_config;
+ struct drm_encoder *encoder = bridge->encoder;
+ struct drm_connector *connector = &mhdp->connector.base;
+
+ connector->interlace_allowed = 1;
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ drm_connector_helper_add(connector, &cdns_hdmi_connector_helper_funcs);
+
+ drm_connector_init(bridge->dev, connector, &cdns_hdmi_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+
+ drm_object_attach_property(&connector->base,
+ config->hdr_output_metadata_property, 0);
+
+ if (!drm_mode_create_hdmi_colorspace_property(connector))
+ drm_object_attach_property(&connector->base,
+ connector->colorspace_property, 0);
+
+ drm_connector_attach_encoder(connector, encoder);
+
+ return 0;
+}
+
+static enum drm_mode_status
+cdns_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode)
+{
+ struct cdns_mhdp_device *mhdp = bridge->driver_private;
+ enum drm_mode_status mode_status = MODE_OK;
+ int ret;
+
+ /* We don't support double-clocked and Interlaced modes */
+ if (mode->flags & DRM_MODE_FLAG_DBLCLK ||
+ mode->flags & DRM_MODE_FLAG_INTERLACE)
+ return MODE_BAD;
+
+ /* MAX support pixel clock rate 594MHz */
+ if (mode->clock > 594000)
+ return MODE_CLOCK_HIGH;
+
+ /* 4096x2160 is not supported */
+ if (mode->hdisplay > 3840 || mode->vdisplay > 2160)
+ return MODE_BAD_HVALUE;
+
+ /* Check modes supported by PHY */
+ mhdp->hdmi.mode_valid = mode;
+ ret = cdns_mhdp_plat_call(mhdp, phy_video_valid);
+ if (ret == false)
+ return MODE_CLOCK_RANGE;
+
+ return mode_status;
+}
+
+static void cdns_hdmi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *orig_mode,
+ const struct drm_display_mode *mode)
+{
+ struct cdns_mhdp_device *mhdp = bridge->driver_private;
+ struct video_info *video = &mhdp->video_info;
+
+ video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
+ video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
+
+ DRM_INFO("Mode: %dx%dp%d\n", mode->hdisplay, mode->vdisplay, mode->clock);
+ memcpy(&mhdp->mode, mode, sizeof(struct drm_display_mode));
+
+ mutex_lock(&mhdp->lock);
+ cdns_hdmi_mode_set(mhdp);
+ mutex_unlock(&mhdp->lock);
+}
+
+bool cdns_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct cdns_mhdp_device *mhdp = bridge->driver_private;
+ struct video_info *video = &mhdp->video_info;
+
+ video->color_depth = 8;
+ video->color_fmt = PXL_RGB;
+
+ return true;
+}
+
+static const struct drm_bridge_funcs cdns_hdmi_bridge_funcs = {
+ .attach = cdns_hdmi_bridge_attach,
+ .mode_set = cdns_hdmi_bridge_mode_set,
+ .mode_valid = cdns_hdmi_bridge_mode_valid,
+ .mode_fixup = cdns_hdmi_bridge_mode_fixup,
+};
+
+static void hotplug_work_func(struct work_struct *work)
+{
+ struct cdns_mhdp_device *mhdp = container_of(work,
+ struct cdns_mhdp_device, hotplug_work.work);
+ struct drm_connector *connector = &mhdp->connector.base;
+
+ drm_helper_hpd_irq_event(connector->dev);
+
+ if (connector->status == connector_status_connected) {
+ DRM_INFO("HDMI Cable Plug In\n");
+ enable_irq(mhdp->irq[IRQ_OUT]);
+ } else if (connector->status == connector_status_disconnected) {
+ /* Cable Disconnedted */
+ DRM_INFO("HDMI Cable Plug Out\n");
+ enable_irq(mhdp->irq[IRQ_IN]);
+ }
+}
+
+static irqreturn_t cdns_hdmi_irq_thread(int irq, void *data)
+{
+ struct cdns_mhdp_device *mhdp = data;
+
+ disable_irq_nosync(irq);
+
+ mod_delayed_work(system_wq, &mhdp->hotplug_work,
+ msecs_to_jiffies(HOTPLUG_DEBOUNCE_MS));
+
+ return IRQ_HANDLED;
+}
+
+static int __cdns_hdmi_probe(struct platform_device *pdev,
+ struct cdns_mhdp_device *mhdp)
+{
+ struct device *dev = &pdev->dev;
+ struct platform_device_info pdevinfo;
+ struct resource *iores = NULL;
+ int ret;
+
+ mutex_init(&mhdp->lock);
+
+ INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func);
+
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ mhdp->regs_base = devm_ioremap(dev, iores->start, resource_size(iores));
+ if (IS_ERR(mhdp->regs_base)) {
+ dev_err(dev, "No regs_base memory\n");
+ return -ENOMEM;
+ }
+
+ mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in");
+ if (mhdp->irq[IRQ_IN] < 0) {
+ dev_info(dev, "No plug_in irq number\n");
+ return -EPROBE_DEFER;
+ }
+
+ mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev, "plug_out");
+ if (mhdp->irq[IRQ_OUT] < 0) {
+ dev_info(dev, "No plug_out irq number\n");
+ return -EPROBE_DEFER;
+ }
+
+ cdns_mhdp_plat_call(mhdp, power_on);
+
+ /* Initialize FW */
+ cdns_mhdp_plat_call(mhdp, firmware_init);
+
+ /* HDMI FW alive check */
+ ret = cdns_mhdp_check_alive(mhdp);
+ if (ret == false) {
+ dev_err(dev, "NO HDMI FW running\n");
+ return -ENXIO;
+ }
+
+ /* Enable Hotplug Detect thread */
+ irq_set_status_flags(mhdp->irq[IRQ_IN], IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_IN],
+ NULL, cdns_hdmi_irq_thread,
+ IRQF_ONESHOT, dev_name(dev),
+ mhdp);
+ if (ret < 0) {
+ dev_err(dev, "can't claim irq %d\n",
+ mhdp->irq[IRQ_IN]);
+ return -EINVAL;
+ }
+
+ irq_set_status_flags(mhdp->irq[IRQ_OUT], IRQ_NOAUTOEN);
+ ret = devm_request_threaded_irq(dev, mhdp->irq[IRQ_OUT],
+ NULL, cdns_hdmi_irq_thread,
+ IRQF_ONESHOT, dev_name(dev),
+ mhdp);
+ if (ret < 0) {
+ dev_err(dev, "can't claim irq %d\n",
+ mhdp->irq[IRQ_OUT]);
+ return -EINVAL;
+ }
+
+ if (cdns_mhdp_read_hpd(mhdp))
+ enable_irq(mhdp->irq[IRQ_OUT]);
+ else
+ enable_irq(mhdp->irq[IRQ_IN]);
+
+ mhdp->bridge.base.driver_private = mhdp;
+ mhdp->bridge.base.funcs = &cdns_hdmi_bridge_funcs;
+#ifdef CONFIG_OF
+ mhdp->bridge.base.of_node = dev->of_node;
+#endif
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = dev;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+
+ dev_set_drvdata(dev, mhdp);
+
+ /* register audio driver */
+ cdns_mhdp_register_audio_driver(dev);
+
+ return 0;
+}
+
+static void __cdns_hdmi_remove(struct cdns_mhdp_device *mhdp)
+{
+ cdns_mhdp_unregister_audio_driver(mhdp->dev);
+}
+
+/* -----------------------------------------------------------------------------
+ * Probe/remove API, used from platforms based on the DRM bridge API.
+ */
+int cdns_hdmi_probe(struct platform_device *pdev,
+ struct cdns_mhdp_device *mhdp)
+{
+ int ret;
+
+ ret = __cdns_hdmi_probe(pdev, mhdp);
+ if (ret < 0)
+ return ret;
+
+ drm_bridge_add(&mhdp->bridge.base);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cdns_hdmi_probe);
+
+void cdns_hdmi_remove(struct platform_device *pdev)
+{
+ struct cdns_mhdp_device *mhdp = platform_get_drvdata(pdev);
+
+ drm_bridge_remove(&mhdp->bridge.base);
+
+ __cdns_hdmi_remove(mhdp);
+}
+EXPORT_SYMBOL_GPL(cdns_hdmi_remove);
+
+/* -----------------------------------------------------------------------------
+ * Bind/unbind API, used from platforms based on the component framework.
+ */
+int cdns_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
+ struct cdns_mhdp_device *mhdp)
+{
+ int ret;
+
+ ret = __cdns_hdmi_probe(pdev, mhdp);
+ if (ret)
+ return ret;
+
+ ret = drm_bridge_attach(encoder, &mhdp->bridge.base, NULL, 0);
+ if (ret) {
+ cdns_hdmi_remove(pdev);
+ DRM_ERROR("Failed to initialize bridge with drm\n");
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cdns_hdmi_bind);
+
+void cdns_hdmi_unbind(struct device *dev)
+{
+ struct cdns_mhdp_device *mhdp = dev_get_drvdata(dev);
+
+ __cdns_hdmi_remove(mhdp);
+}
+EXPORT_SYMBOL_GPL(cdns_hdmi_unbind);
+
+MODULE_AUTHOR("Sandor Yu <sandor.yu@....com>");
+MODULE_DESCRIPTION("Cadence HDMI transmitter driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cdn-hdmi");
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.h b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.h
index b122bf5f0bdf..fea648070611 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.h
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-common.h
@@ -23,4 +23,18 @@ int cdns_mhdp_reg_write_bit(struct cdns_mhdp_device *mhdp, u16 addr,
/* Audio */
int cdns_mhdp_register_audio_driver(struct device *dev);
void cdns_mhdp_unregister_audio_driver(struct device *dev);
+
+/* HDMI */
+int cdns_hdmi_scdc_write(struct cdns_mhdp_device *mhdp, u8 addr, u8 value);
+void cdns_mhdp_infoframe_set(struct cdns_mhdp_device *mhdp,
+ u8 entry_id, u8 packet_len, u8 *packet, u8 packet_type);
+int cdns_hdmi_ctrl_init(struct cdns_mhdp_device *mhdp,
+ int protocol, u32 char_rate);
+int cdns_hdmi_enable_gcp(struct cdns_mhdp_device *mhdp);
+int cdns_hdmi_disable_gcp(struct cdns_mhdp_device *mhdp);
+int cdns_hdmi_mode_config(struct cdns_mhdp_device *mhdp,
+ struct drm_display_mode *mode, struct video_info *video_info);
+int cdns_hdmi_get_edid_block(void *data, u8 *edid,
+ u32 block, size_t length);
+
#endif
diff --git a/drivers/gpu/drm/bridge/cadence/cdns-mhdp-hdmi.c b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-hdmi.c
new file mode 100644
index 000000000000..b8826a9ed524
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cadence/cdns-mhdp-hdmi.c
@@ -0,0 +1,330 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2019-2020 NXP Semiconductor, Inc.
+ *
+ */
+
+#include <drm/bridge/cdns-mhdp.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_print.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+
+#include "cdns-mhdp-common.h"
+
+void cdns_mhdp_infoframe_set(struct cdns_mhdp_device *mhdp,
+ u8 entry_id, u8 packet_len, u8 *packet, u8 packet_type)
+{
+ u32 *packet32, len32;
+ u32 val, i;
+
+ /* invalidate entry */
+ val = F_ACTIVE_IDLE_TYPE(1) | F_PKT_ALLOC_ADDRESS(entry_id);
+ cdns_mhdp_bus_write(val, mhdp, SOURCE_PIF_PKT_ALLOC_REG);
+ cdns_mhdp_bus_write(F_PKT_ALLOC_WR_EN(1), mhdp, SOURCE_PIF_PKT_ALLOC_WR_EN);
+
+ /* flush fifo 1 */
+ cdns_mhdp_bus_write(F_FIFO1_FLUSH(1), mhdp, SOURCE_PIF_FIFO1_FLUSH);
+
+ /* write packet into memory */
+ packet32 = (u32 *)packet;
+ len32 = packet_len / 4;
+ for (i = 0; i < len32; i++)
+ cdns_mhdp_bus_write(F_DATA_WR(packet32[i]), mhdp, SOURCE_PIF_DATA_WR);
+
+ /* write entry id */
+ cdns_mhdp_bus_write(F_WR_ADDR(entry_id), mhdp, SOURCE_PIF_WR_ADDR);
+
+ /* write request */
+ cdns_mhdp_bus_write(F_HOST_WR(1), mhdp, SOURCE_PIF_WR_REQ);
+
+ /* update entry */
+ val = F_ACTIVE_IDLE_TYPE(1) | F_TYPE_VALID(1) |
+ F_PACKET_TYPE(packet_type) | F_PKT_ALLOC_ADDRESS(entry_id);
+ cdns_mhdp_bus_write(val, mhdp, SOURCE_PIF_PKT_ALLOC_REG);
+
+ cdns_mhdp_bus_write(F_PKT_ALLOC_WR_EN(1), mhdp, SOURCE_PIF_PKT_ALLOC_WR_EN);
+}
+
+int cdns_hdmi_get_edid_block(void *data, u8 *edid,
+ u32 block, size_t length)
+{
+ struct cdns_mhdp_device *mhdp = data;
+ u8 msg[2], reg[5], i;
+ int ret;
+
+ for (i = 0; i < 4; i++) {
+ msg[0] = block / 2;
+ msg[1] = block % 2;
+
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_HDMI_TX, HDMI_TX_EDID,
+ sizeof(msg), msg);
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_HDMI_TX,
+ HDMI_TX_EDID, sizeof(reg) + length);
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg));
+ if (ret)
+ continue;
+
+ ret = cdns_mhdp_mailbox_read_receive(mhdp, edid, length);
+ if (ret)
+ continue;
+
+ if ((reg[3] << 8 | reg[4]) == length)
+ break;
+ }
+
+ if (ret)
+ DRM_ERROR("get block[%d] edid failed: %d\n", block, ret);
+ return ret;
+}
+
+int cdns_hdmi_scdc_read(struct cdns_mhdp_device *mhdp, u8 addr, u8 *data)
+{
+ u8 msg[4], reg[6];
+ int ret;
+
+ msg[0] = 0x54;
+ msg[1] = addr;
+ msg[2] = 0;
+ msg[3] = 1;
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_HDMI_TX, HDMI_TX_READ,
+ sizeof(msg), msg);
+ if (ret)
+ goto err_scdc_read;
+
+ ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_HDMI_TX,
+ HDMI_TX_READ, sizeof(reg));
+ if (ret)
+ goto err_scdc_read;
+
+ ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg));
+ if (ret)
+ goto err_scdc_read;
+
+ *data = reg[5];
+
+err_scdc_read:
+ if (ret)
+ DRM_ERROR("scdc read failed: %d\n", ret);
+ return ret;
+}
+
+int cdns_hdmi_scdc_write(struct cdns_mhdp_device *mhdp, u8 addr, u8 value)
+{
+ u8 msg[5], reg[5];
+ int ret;
+
+ msg[0] = 0x54;
+ msg[1] = addr;
+ msg[2] = 0;
+ msg[3] = 1;
+ msg[4] = value;
+ ret = cdns_mhdp_mailbox_send(mhdp, MB_MODULE_ID_HDMI_TX, HDMI_TX_WRITE,
+ sizeof(msg), msg);
+ if (ret)
+ goto err_scdc_write;
+
+ ret = cdns_mhdp_mailbox_validate_receive(mhdp, MB_MODULE_ID_HDMI_TX,
+ HDMI_TX_WRITE, sizeof(reg));
+ if (ret)
+ goto err_scdc_write;
+
+ ret = cdns_mhdp_mailbox_read_receive(mhdp, reg, sizeof(reg));
+ if (ret)
+ goto err_scdc_write;
+
+ if (reg[0] != 0)
+ ret = -EINVAL;
+
+err_scdc_write:
+ if (ret)
+ DRM_ERROR("scdc write failed: %d\n", ret);
+ return ret;
+}
+
+int cdns_hdmi_ctrl_init(struct cdns_mhdp_device *mhdp,
+ int protocol, u32 char_rate)
+{
+ u32 reg0;
+ u32 reg1;
+ u32 val;
+ int ret;
+
+ /* Set PHY to HDMI data */
+ ret = cdns_mhdp_reg_write(mhdp, PHY_DATA_SEL, F_SOURCE_PHY_MHDP_SEL(1));
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_HPD,
+ F_HPD_VALID_WIDTH(4) | F_HPD_GLITCH_WIDTH(0));
+ if (ret < 0)
+ return ret;
+
+ /* open CARS */
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_PHY_CAR, 0xF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_HDTX_CAR, 0xFF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_PKT_CAR, 0xF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_AIF_CAR, 0xF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_CIPHER_CAR, 0xF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_CRYPTO_CAR, 0xF);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, SOURCE_CEC_CAR, 3);
+ if (ret < 0)
+ return ret;
+
+ reg0 = reg1 = 0x7c1f;
+ if (protocol == MODE_HDMI_2_0 && char_rate >= 340000) {
+ reg0 = 0;
+ reg1 = 0xFFFFF;
+ }
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CLOCK_REG_0, reg0);
+ if (ret < 0)
+ return ret;
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CLOCK_REG_1, reg1);
+ if (ret < 0)
+ return ret;
+
+ /* set hdmi mode and preemble mode data enable */
+ val = F_HDMI_MODE(protocol) | F_HDMI2_PREAMBLE_EN(1) | F_DATA_EN(1) |
+ F_HDMI2_CTRL_IL_MODE(1) | F_BCH_EN(1) | F_PIC_3D(0XF);
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+
+ return ret;
+}
+
+int cdns_hdmi_mode_config(struct cdns_mhdp_device *mhdp,
+ struct drm_display_mode *mode,
+ struct video_info *video_info)
+{
+ int ret;
+ u32 val;
+ u32 vsync_lines = mode->vsync_end - mode->vsync_start;
+ u32 eof_lines = mode->vsync_start - mode->vdisplay;
+ u32 sof_lines = mode->vtotal - mode->vsync_end;
+ u32 hblank = mode->htotal - mode->hdisplay;
+ u32 hactive = mode->hdisplay;
+ u32 vblank = mode->vtotal - mode->vdisplay;
+ u32 vactive = mode->vdisplay;
+ u32 hfront = mode->hsync_start - mode->hdisplay;
+ u32 hback = mode->htotal - mode->hsync_end;
+ u32 vfront = eof_lines;
+ u32 hsync = hblank - hfront - hback;
+ u32 vsync = vsync_lines;
+ u32 vback = sof_lines;
+ u32 v_h_polarity = ((mode->flags & DRM_MODE_FLAG_NHSYNC) ? 0 : 1) +
+ ((mode->flags & DRM_MODE_FLAG_NVSYNC) ? 0 : 2);
+
+ ret = cdns_mhdp_reg_write(mhdp, SCHEDULER_H_SIZE, (hactive << 16) + hblank);
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, SCHEDULER_V_SIZE, (vactive << 16) + vblank);
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_SIGNAL_FRONT_WIDTH, (vfront << 16) + hfront);
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_SIGNAL_SYNC_WIDTH, (vsync << 16) + hsync);
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_SIGNAL_BACK_WIDTH, (vback << 16) + hback);
+ if (ret < 0)
+ return ret;
+
+ ret = cdns_mhdp_reg_write(mhdp, HSYNC2VSYNC_POL_CTRL, v_h_polarity);
+ if (ret < 0)
+ return ret;
+
+ /* Reset Data Enable */
+ val = cdns_mhdp_reg_read(mhdp, HDTX_CONTROLLER);
+ val &= ~F_DATA_EN(1);
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+ if (ret < 0)
+ return ret;
+
+ /* Set bpc */
+ val &= ~F_VIF_DATA_WIDTH(3);
+ switch (video_info->color_depth) {
+ case 10:
+ val |= F_VIF_DATA_WIDTH(1);
+ break;
+ case 12:
+ val |= F_VIF_DATA_WIDTH(2);
+ break;
+ case 16:
+ val |= F_VIF_DATA_WIDTH(3);
+ break;
+ case 8:
+ default:
+ val |= F_VIF_DATA_WIDTH(0);
+ break;
+ }
+
+ /* select color encoding */
+ val &= ~F_HDMI_ENCODING(3);
+ switch (video_info->color_fmt) {
+ case YCBCR_4_4_4:
+ val |= F_HDMI_ENCODING(2);
+ break;
+ case YCBCR_4_2_2:
+ val |= F_HDMI_ENCODING(1);
+ break;
+ case YCBCR_4_2_0:
+ val |= F_HDMI_ENCODING(3);
+ break;
+ case PXL_RGB:
+ default:
+ val |= F_HDMI_ENCODING(0);
+ break;
+ }
+
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+ if (ret < 0)
+ return ret;
+
+ /* set data enable */
+ val |= F_DATA_EN(1);
+ ret = cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+
+ return ret;
+}
+
+int cdns_hdmi_disable_gcp(struct cdns_mhdp_device *mhdp)
+{
+ u32 val;
+
+ val = cdns_mhdp_reg_read(mhdp, HDTX_CONTROLLER);
+ val &= ~F_GCP_EN(1);
+
+ return cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+}
+
+int cdns_hdmi_enable_gcp(struct cdns_mhdp_device *mhdp)
+{
+ u32 val;
+
+ val = cdns_mhdp_reg_read(mhdp, HDTX_CONTROLLER);
+ val |= F_GCP_EN(1);
+
+ return cdns_mhdp_reg_write(mhdp, HDTX_CONTROLLER, val);
+}
diff --git a/include/drm/bridge/cdns-mhdp.h b/include/drm/bridge/cdns-mhdp.h
index 6ffb97e17fae..7902ecb115e2 100644
--- a/include/drm/bridge/cdns-mhdp.h
+++ b/include/drm/bridge/cdns-mhdp.h
@@ -84,6 +84,7 @@
/* bellow registers need access by mailbox */
/* source phy comp */
+#define PHY_DATA_SEL 0x0818
#define LANES_CONFIG 0x0814
/* source car addr */
@@ -97,6 +98,17 @@
#define SOURCE_CIPHER_CAR 0x0920
#define SOURCE_CRYPTO_CAR 0x0924
+/* mhdp tx_top_comp */
+#define SCHEDULER_H_SIZE 0x1000
+#define SCHEDULER_V_SIZE 0x1004
+#define HDTX_SIGNAL_FRONT_WIDTH 0x100c
+#define HDTX_SIGNAL_SYNC_WIDTH 0x1010
+#define HDTX_SIGNAL_BACK_WIDTH 0x1014
+#define HDTX_CONTROLLER 0x1018
+#define HDTX_HPD 0x1020
+#define HDTX_CLOCK_REG_0 0x1024
+#define HDTX_CLOCK_REG_1 0x1028
+
/* clock meters addr */
#define CM_CTRL 0x0a00
#define CM_I2S_CTRL 0x0a04
@@ -333,6 +345,7 @@
#define GENERAL_READ_REGISTER 0x07
#define GENERAL_GET_HPD_STATE 0x11
+/* DPTX opcode */
#define DPTX_SET_POWER_MNG 0x00
#define DPTX_SET_HOST_CAPABILITIES 0x01
#define DPTX_GET_EDID 0x02
@@ -352,6 +365,17 @@
#define DPTX_FORCE_LANES 0x10
#define DPTX_HPD_STATE 0x11
+/* HDMI TX opcode */
+#define HDMI_TX_READ 0x00
+#define HDMI_TX_WRITE 0x01
+#define HDMI_TX_UPDATE_READ 0x02
+#define HDMI_TX_EDID 0x03
+#define HDMI_TX_EVENTS 0x04
+#define HDMI_TX_HPD_STATUS 0x05
+#define HDMI_TX_DEBUG_ECHO 0xAA
+#define HDMI_TX_TEST 0xBB
+#define HDMI_TX_EDID_INTERNAL 0xF0
+
#define FW_STANDBY 0
#define FW_ACTIVE 1
@@ -402,6 +426,34 @@
#define TU_SIZE 30
#define CDNS_DP_MAX_LINK_RATE 540000
+#define F_HDMI_ENCODING(x) (((x) & ((1 << 2) - 1)) << 16)
+#define F_VIF_DATA_WIDTH(x) (((x) & ((1 << 2) - 1)) << 2)
+#define F_HDMI_MODE(x) (((x) & ((1 << 2) - 1)) << 0)
+#define F_GCP_EN(x) (((x) & ((1 << 1) - 1)) << 12)
+#define F_DATA_EN(x) (((x) & ((1 << 1) - 1)) << 15)
+#define F_HDMI2_PREAMBLE_EN(x) (((x) & ((1 << 1) - 1)) << 18)
+#define F_PIC_3D(x) (((x) & ((1 << 4) - 1)) << 7)
+#define F_BCH_EN(x) (((x) & ((1 << 1) - 1)) << 11)
+#define F_SOURCE_PHY_MHDP_SEL(x) (((x) & ((1 << 2) - 1)) << 3)
+#define F_HPD_VALID_WIDTH(x) (((x) & ((1 << 12) - 1)) << 0)
+#define F_HPD_GLITCH_WIDTH(x) (((x) & ((1 << 8) - 1)) << 12)
+#define F_HDMI2_CTRL_IL_MODE(x) (((x) & ((1 << 1) - 1)) << 19)
+#define F_SOURCE_PHY_LANE0_SWAP(x) (((x) & ((1 << 2) - 1)) << 0)
+#define F_SOURCE_PHY_LANE1_SWAP(x) (((x) & ((1 << 2) - 1)) << 2)
+#define F_SOURCE_PHY_LANE2_SWAP(x) (((x) & ((1 << 2) - 1)) << 4)
+#define F_SOURCE_PHY_LANE3_SWAP(x) (((x) & ((1 << 2) - 1)) << 6)
+#define F_SOURCE_PHY_COMB_BYPASS(x) (((x) & ((1 << 1) - 1)) << 21)
+#define F_SOURCE_PHY_20_10(x) (((x) & ((1 << 1) - 1)) << 22)
+#define F_PKT_ALLOC_ADDRESS(x) (((x) & ((1 << 4) - 1)) << 0)
+#define F_ACTIVE_IDLE_TYPE(x) (((x) & ((1 << 1) - 1)) << 17)
+#define F_FIFO1_FLUSH(x) (((x) & ((1 << 1) - 1)) << 0)
+#define F_PKT_ALLOC_WR_EN(x) (((x) & ((1 << 1) - 1)) << 0)
+#define F_DATA_WR(x) (x)
+#define F_WR_ADDR(x) (((x) & ((1 << 4) - 1)) << 0)
+#define F_HOST_WR(x) (((x) & ((1 << 1) - 1)) << 0)
+#define F_TYPE_VALID(x) (((x) & ((1 << 1) - 1)) << 16)
+#define F_PACKET_TYPE(x) (((x) & ((1 << 8) - 1)) << 8)
+
/* audio */
#define AUDIO_PACK_EN BIT(8)
#define SAMPLING_FREQ(x) (((x) & 0xf) << 16)
@@ -481,6 +533,12 @@ enum audio_format {
AFMT_UNUSED,
};
+enum {
+ MODE_DVI,
+ MODE_HDMI_1_4,
+ MODE_HDMI_2_0,
+};
+
struct audio_info {
enum audio_format format;
int sample_rate;
@@ -567,6 +625,11 @@ struct cdns_mhdp_device {
struct drm_dp_aux aux;
u8 dpcd[DP_RECEIVER_CAP_SIZE];
} dp;
+ struct _hdmi_data {
+ u32 char_rate;
+ u32 hdmi_type;
+ const struct drm_display_mode *mode_valid;
+ } hdmi;
};
const struct cdns_plat_data *plat_data;
@@ -603,4 +666,10 @@ u32 cdns_phy_reg_read(struct cdns_mhdp_device *mhdp, u32 addr);
int cdns_dp_bind(struct platform_device *pdev, struct drm_encoder *encoder,
struct cdns_mhdp_device *mhdp);
void cdns_dp_unbind(struct device *dev);
+
+/* HDMI */
+int cdns_hdmi_bind(struct platform_device *pdev, struct drm_encoder *encoder,
+ struct cdns_mhdp_device *mhdp);
+void cdns_hdmi_unbind(struct device *dev);
+
#endif /* CDNS_MHDP_H_ */
--
2.17.1
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