[PATCH v3 3/3] drm/layerscape: Add HDMI driver for freescale DCU
Meng Yi
meng.yi at nxp.com
Wed Mar 9 08:31:02 UTC 2016
DCU is the shortcut of 'display controller unit', some HDMI transmitter
attached to DCU, such as sii9022a, and this driver add the relavent
functions to DRM framewrok.
Signed-off-by: Meng Yi <meng.yi at nxp.com>
Signed-off-by: Alison Wang <alison.wang at nxp.com>
Signed-off-by: Xiubo Li <lixiubo at cmss.chinamobile.com>
Signed-off-by: Jianwei Wang <jianwei.wang.chn at gmail.com>
---
Change in V3:
Use "of_graph" to describe the connection to DCU.
---
.../bindings/display/bridge/sil,sii9022a.txt | 55 ++++
drivers/gpu/drm/fsl-dcu/Makefile | 1 +
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 1 +
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c | 292 +++++++++++++++++++++
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c | 12 +
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h | 11 +
6 files changed, 372 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt
create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
diff --git a/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt
new file mode 100644
index 0000000..20655f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/sil,sii9022a.txt
@@ -0,0 +1,55 @@
+Device-Tree bindings for the SiI902x hdmi transmitter.
+-----------------------------------------
+
+The SiI9022A is an ultra low-power HDMI transmitter. It supports resolutions from
+standard definition 480i/p and 576i/p all the way to high-definition 720p, 1080i,
+and 1080p, the highest resolution supported by HDTVs today. It also supports all
+PC resolutions up to UXGA for netbooks
+
+Required properties:
+- compatible: Should be "sil,sii9022a".
+- reg: The I2C address of the device.
+- interrupts: Interrupt number to the cpu.
+
+Required nodes:
+
+The sii9022 has one video ports. Its connection is modelled using the OF
+graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+
+- Video port 0 for the HDMI output
+
+Example:
+-------
+
+/ {
+ hdmi-out {
+ compatible = "hdmi-connector";
+ type = "a";
+
+ port {
+ hdmi_con: endpoint {
+ remote-endpoint = <&sii9022a_out>;
+ };
+ };
+ };
+};
+
+&i2c1 {
+ sii9022: hdmi at 39 {
+ compatible = "sil,sii9022a";
+ reg = <0x39>;
+ interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port at 0 {
+ reg = <0>;
+ sii9022_out: endpoint {
+ remote-endpoint = <&hdmi_con>;
+ };
+ };
+ };
+ };
+};
diff --git a/drivers/gpu/drm/fsl-dcu/Makefile b/drivers/gpu/drm/fsl-dcu/Makefile
index 6ea1523..98cacc2 100644
--- a/drivers/gpu/drm/fsl-dcu/Makefile
+++ b/drivers/gpu/drm/fsl-dcu/Makefile
@@ -1,6 +1,7 @@
fsl-dcu-drm-y := fsl_dcu_drm_drv.o \
fsl_dcu_drm_kms.o \
fsl_dcu_drm_rgb.o \
+ fsl_dcu_drm_hdmi.o \
fsl_dcu_drm_plane.o \
fsl_dcu_drm_crtc.o \
fsl_dcu_drm_fbdev.o
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
index 6413ac9..7d1b0fd 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h
@@ -189,6 +189,7 @@ struct fsl_dcu_drm_device {
struct drm_fbdev_cma *fbdev;
struct drm_crtc crtc;
struct drm_encoder encoder;
+ struct drm_encoder_slave *slave;
struct fsl_dcu_drm_connector connector;
const struct fsl_dcu_soc_data *soc;
};
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
new file mode 100644
index 0000000..97d8621
--- /dev/null
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
@@ -0,0 +1,292 @@
+/*
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * Freescale DCU drm device driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/fb.h>
+#include <linux/fsl_devices.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/backlight.h>
+#include <linux/of_graph.h>
+#include <video/videomode.h>
+#include <video/of_display_timing.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_encoder_slave.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_edid.h>
+
+#include "fsl_dcu_drm_drv.h"
+#include "fsl_dcu_drm_output.h"
+
+#define to_drm_encoder_slave(e) \
+ container_of(e, struct drm_encoder_slave, base)
+#define to_slave_funcs(e) (to_drm_encoder_slave(e)->slave_funcs)
+static void fsl_dcu_drm_hdmienc_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
+
+ if (sfuncs->mode_set)
+ sfuncs->mode_set(encoder, mode, adjusted_mode);
+
+}
+
+static int
+fsl_dcu_drm_hdmienc_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ return 0;
+}
+
+static void fsl_dcu_drm_hdmienc_disable(struct drm_encoder *encoder)
+{
+ const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
+
+ if (sfuncs->dpms)
+ sfuncs->dpms(encoder, DRM_MODE_DPMS_OFF);
+}
+
+static void fsl_dcu_drm_hdmienc_enable(struct drm_encoder *encoder)
+{
+ const struct drm_encoder_slave_funcs *sfuncs = to_slave_funcs(encoder);
+
+ if (sfuncs->dpms)
+ sfuncs->dpms(encoder, DRM_MODE_DPMS_ON);
+}
+
+static const struct drm_encoder_helper_funcs encoder_helper_funcs = {
+ .atomic_check = fsl_dcu_drm_hdmienc_atomic_check,
+ .disable = fsl_dcu_drm_hdmienc_disable,
+ .enable = fsl_dcu_drm_hdmienc_enable,
+ .mode_set = fsl_dcu_drm_hdmienc_mode_set,
+};
+
+static void fsl_dcu_drm_hdmienc_destroy(struct drm_encoder *encoder)
+{
+ drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs encoder_funcs = {
+ .destroy = fsl_dcu_drm_hdmienc_destroy,
+};
+int fsl_dcu_drm_hdmienc_create(struct fsl_dcu_drm_device *fsl_dev,
+ struct drm_crtc *crtc)
+{
+ struct drm_i2c_encoder_driver *driver;
+ struct drm_encoder_slave *enc_slave;
+ struct drm_encoder *encoder;
+ struct i2c_client *i2c_slave;
+ int ret;
+ struct device_node *entity;
+ struct of_endpoint *ep;
+ struct device_node *ep_node;
+ struct device_node *parent = fsl_dev->dev->of_node;
+
+ ep = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct of_endpoint), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ ep_node = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct device_node), GFP_KERNEL);
+ if (!ep_node)
+ return -ENOMEM;
+
+ ep_node = of_graph_get_next_endpoint(parent, NULL);
+
+ ret = of_graph_parse_endpoint(ep_node, ep);
+ if (ret < 0) {
+ of_node_put(ep_node);
+ return ret;
+ }
+
+ entity = of_graph_get_remote_port_parent(ep->local_node);
+ if (!entity) {
+ dev_dbg(fsl_dev->dev, "unconnected endpoint %s, skipping\n",
+ ep->local_node->full_name);
+ return -ENODEV;
+ }
+ i2c_slave = of_find_i2c_device_by_node(entity);
+
+ if (!i2c_slave || !i2c_get_clientdata(i2c_slave))
+ return -EPROBE_DEFER;
+
+ enc_slave = devm_kzalloc(fsl_dev->dev, sizeof(*enc_slave), GFP_KERNEL);
+ if (!enc_slave)
+ return -ENOMEM;
+
+ /* Initialize the slave encoder. */
+ driver = to_drm_i2c_encoder_driver(
+ to_i2c_driver(i2c_slave->dev.driver));
+ driver->encoder_init(i2c_slave, fsl_dev->drm, enc_slave);
+
+ fsl_dev->slave = enc_slave;
+ encoder = &enc_slave->base;
+
+
+ encoder->possible_crtcs = 1;
+ ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
+ DRM_MODE_ENCODER_TMDS, NULL);
+ if (ret < 0)
+ return ret;
+
+ drm_encoder_helper_add(encoder, &encoder_helper_funcs);
+ encoder->crtc = crtc;
+
+ return 0;
+}
+
+#define to_fsl_dcu_drm_hdmicon(connector) \
+ container_of(connector, struct fsl_dcu_drm_hdmicon, connector)
+
+static struct drm_encoder *fsl_dcu_drm_hdmi_find_encoder(struct drm_device *dev)
+{
+ struct drm_encoder *encoder;
+
+ list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+ if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS)
+ return encoder;
+ }
+
+ return NULL;
+}
+
+static void fsl_dcu_drm_hdmicon_destroy(struct drm_connector *connector)
+{
+ drm_connector_unregister(connector);
+ drm_connector_cleanup(connector);
+}
+
+static enum drm_connector_status
+fsl_dcu_drm_hdmicon_detect(struct drm_connector *connector, bool force)
+{
+ struct fsl_dcu_drm_hdmicon *hdmicon = to_fsl_dcu_drm_hdmicon(connector);
+
+ if (hdmicon->status == connector_status_disconnected)
+ return connector_status_disconnected;
+ else
+ return connector_status_connected;
+}
+
+static const struct drm_connector_funcs fsl_dcu_drm_connector_funcs = {
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .destroy = fsl_dcu_drm_hdmicon_destroy,
+ .detect = fsl_dcu_drm_hdmicon_detect,
+ .dpms = drm_atomic_helper_connector_dpms,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .reset = drm_atomic_helper_connector_reset,
+};
+
+static struct drm_encoder *
+fsl_dcu_drm_hdmicon_best_encoder(struct drm_connector *connector)
+{
+ struct drm_device *dev = connector->dev;
+
+ return fsl_dcu_drm_hdmi_find_encoder(dev);
+}
+
+
+static int fsl_dcu_drm_hdmicon_get_modes(struct drm_connector *connector)
+{
+ struct fsl_dcu_drm_hdmicon *con = to_fsl_dcu_drm_hdmicon(connector);
+ const struct drm_encoder_slave_funcs *sfuncs = con->slave->slave_funcs;
+
+ if (sfuncs->get_modes == NULL)
+ return 0;
+
+ return sfuncs->get_modes(NULL, connector);
+}
+
+static int fsl_dcu_drm_hdmicon_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ if (mode->hdisplay > 1024)
+ return MODE_VIRTUAL_X;
+ else if (mode->vdisplay > 768)
+ return MODE_VIRTUAL_Y;
+
+ return MODE_OK;
+}
+
+static const struct drm_connector_helper_funcs connector_helper_funcs = {
+ .best_encoder = fsl_dcu_drm_hdmicon_best_encoder,
+ .get_modes = fsl_dcu_drm_hdmicon_get_modes,
+ .mode_valid = fsl_dcu_drm_hdmicon_mode_valid,
+};
+
+int fsl_dcu_drm_hdmicon_create(struct fsl_dcu_drm_device *fsl_dev)
+{
+ struct drm_device *dev = fsl_dev->drm;
+ struct fsl_dcu_drm_hdmicon *hdmicon;
+ struct drm_connector *connector;
+ struct drm_encoder *encoder;
+ int ret;
+
+ hdmicon = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct fsl_dcu_drm_hdmicon), GFP_KERNEL);
+ if (!hdmicon)
+ return -ENOMEM;
+
+ hdmicon->slave = fsl_dev->slave;
+ connector = &hdmicon->connector;
+
+ connector->display_info.width_mm = 0;
+ connector->display_info.height_mm = 0;
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+
+ ret = drm_connector_init(fsl_dev->drm, connector,
+ &fsl_dcu_drm_connector_funcs,
+ DRM_MODE_CONNECTOR_HDMIA);
+ if (ret < 0)
+ return ret;
+
+ connector->dpms = DRM_MODE_DPMS_OFF;
+ drm_connector_helper_add(connector, &connector_helper_funcs);
+ ret = drm_connector_register(connector);
+ if (ret < 0)
+ goto err_cleanup;
+
+ encoder = fsl_dcu_drm_hdmi_find_encoder(dev);
+ if (!encoder)
+ goto err_cleanup;
+ ret = drm_mode_connector_attach_encoder(connector, encoder);
+ if (ret < 0)
+ goto err_sysfs;
+
+ connector->encoder = encoder;
+
+ drm_object_property_set_value
+ (&connector->base, fsl_dev->drm->mode_config.dpms_property,
+ DRM_MODE_DPMS_OFF);
+
+ return 0;
+
+err_sysfs:
+ drm_connector_unregister(connector);
+err_cleanup:
+ drm_connector_cleanup(connector);
+ return ret;
+}
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("SII902x DVI/HDMI driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
index c564ec6..94b1111 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c
@@ -17,10 +17,18 @@
#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"
+static void fsl_dcu_drm_output_poll_changed(struct drm_device *dev)
+{
+ struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
+
+ drm_fbdev_cma_hotplug_event(fsl_dev->fbdev);
+}
+
static const struct drm_mode_config_funcs fsl_dcu_drm_mode_config_funcs = {
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
.fb_create = drm_fb_cma_create,
+ .output_poll_changed = fsl_dcu_drm_output_poll_changed,
};
int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev)
@@ -43,10 +51,14 @@ int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev)
if (ret)
goto fail_encoder;
+ fsl_dcu_drm_hdmienc_create(fsl_dev, &fsl_dev->crtc);
+
ret = fsl_dcu_drm_connector_create(fsl_dev, &fsl_dev->encoder);
if (ret)
goto fail_connector;
+ fsl_dcu_drm_hdmicon_create(fsl_dev);
+
drm_mode_config_reset(fsl_dev->drm);
drm_kms_helper_poll_init(fsl_dev->drm);
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h
index 7093109..fa0d7ed 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h
@@ -18,6 +18,13 @@ struct fsl_dcu_drm_connector {
struct drm_panel *panel;
};
+struct fsl_dcu_drm_hdmicon {
+ struct drm_connector connector;
+ struct drm_encoder_slave *slave;
+ struct i2c_client *client;
+ enum drm_connector_status status;
+};
+
static inline struct fsl_dcu_drm_connector *
to_fsl_dcu_connector(struct drm_connector *con)
{
@@ -29,5 +36,9 @@ int fsl_dcu_drm_connector_create(struct fsl_dcu_drm_device *fsl_dev,
struct drm_encoder *encoder);
int fsl_dcu_drm_encoder_create(struct fsl_dcu_drm_device *fsl_dev,
struct drm_crtc *crtc);
+int fsl_dcu_drm_hdmicon_create(struct fsl_dcu_drm_device *fsl_dev);
+int fsl_dcu_drm_hdmienc_create(struct fsl_dcu_drm_device *fsl_dev,
+ struct drm_crtc *crtc);
+
#endif /* __FSL_DCU_DRM_CONNECTOR_H__ */
--
2.1.0.27.g96db324
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