[PATCH 1/2] drm/fsl-dcu: Add HDMI driver for freescale DCU
Meng Yi
meng.yi at nxp.com
Sun May 15 08:34:44 UTC 2016
This driver add the basic functions for Encoder, and link the Encoder to
appropriate DRM bridge.
This driver is depend on sii9022 driver(drm_bridge approach),which is
sent by Boris Brezillon to community but not merged.
https://patchwork.kernel.org/patch/8600921/
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>
Signed-off-by: Meng Yi <meng.yi at nxp.com>
---
drivers/gpu/drm/fsl-dcu/Makefile | 1 +
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c | 194 +++++++++++++++++++++++++++
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_kms.c | 29 ++++
drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h | 4 +
4 files changed, 228 insertions(+)
create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
diff --git a/drivers/gpu/drm/fsl-dcu/Makefile b/drivers/gpu/drm/fsl-dcu/Makefile
index b35a292..12e2245 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_hdmi.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
new file mode 100644
index 0000000..76441c7
--- /dev/null
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_hdmi.c
@@ -0,0 +1,194 @@
+/*
+ * 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"
+
+static void
+fsl_dcu_drm_hdmienc_mode_set(struct drm_encoder *encoder,
+ struct drm_display_mode *mode,
+ struct drm_display_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)
+{
+}
+
+static void
+fsl_dcu_drm_hdmienc_enable(struct drm_encoder *encoder)
+{
+}
+
+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);
+}
+
+void fsl_dcu_drm_hdmienc_reset(struct drm_encoder *encoder)
+{
+}
+
+static const struct drm_encoder_funcs encoder_funcs = {
+ .reset = fsl_dcu_drm_hdmienc_reset,
+ .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_encoder *encoder;
+ int ret;
+
+ do {
+ encoder = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct drm_encoder), GFP_KERNEL);
+ encoder->possible_crtcs = 1;
+ ret = drm_encoder_init(fsl_dev->drm, encoder, &encoder_funcs,
+ DRM_MODE_ENCODER_TMDS, NULL);
+ if (ret < 0) {
+ devm_kfree(fsl_dev->dev, encoder);
+ break;
+ }
+
+ drm_encoder_helper_add(encoder, &encoder_helper_funcs);
+ encoder->crtc = crtc;
+
+ return 0;
+ } while (false);
+
+ DRM_ERROR("failed to initialize hdmi encoder\n");
+ if (encoder)
+ devm_kfree(fsl_dev->dev, encoder);
+
+ crtc->funcs->destroy(crtc);
+ return ret;
+}
+
+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;
+}
+
+int fsl_dcu_drm_hdmienc_attach_bridge(struct fsl_dcu_drm_device *fsl_dev)
+{
+ struct drm_device *drm_dev = fsl_dev->drm;
+ struct drm_encoder *encoder;
+ struct drm_bridge *bridge;
+ int ret;
+ struct device_node *entity;
+ struct of_endpoint *ep;
+ struct device_node *ep_node;
+ struct device_node *parent = fsl_dev->dev->of_node;
+
+ do {
+ ep = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct of_endpoint), GFP_KERNEL);
+ if (!ep)
+ break;
+
+ ep_node = devm_kzalloc(fsl_dev->dev,
+ sizeof(struct device_node), GFP_KERNEL);
+ if (!ep_node)
+ break;
+
+ ep_node = of_graph_get_next_endpoint(parent, NULL);
+ if (!ep_node)
+ break;
+
+ ret = of_graph_parse_endpoint(ep_node, ep);
+ if (ret < 0) {
+ of_node_put(ep_node);
+ break;
+ }
+
+ entity = of_graph_get_remote_port_parent(ep->local_node);
+ if (!entity)
+ break;
+
+ bridge = of_drm_find_bridge(entity);
+ if (!bridge)
+ break;
+
+ encoder = fsl_dcu_drm_hdmi_find_encoder(drm_dev);
+ if (!encoder)
+ break;
+
+ encoder->bridge = bridge;
+ bridge->encoder = encoder;
+
+ ret = drm_bridge_attach(drm_dev, bridge);
+ if (ret)
+ break;
+
+ return 0;
+ } while (false);
+
+ DRM_ERROR("failed to attach the bridge\n");
+
+ if (ep)
+ devm_kfree(fsl_dev->dev, ep);
+
+ if (ep_node)
+ devm_kfree(fsl_dev->dev, ep_node);
+
+ encoder->funcs->destroy(encoder);
+ return ret;
+}
+
+MODULE_AUTHOR("NXP Semiconductor, Inc.");
+MODULE_DESCRIPTION("NXP LS1021A DCU 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..a7fe1d2 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 +17,29 @@
#include "fsl_dcu_drm_crtc.h"
#include "fsl_dcu_drm_drv.h"
+bool g_enable_hdmi;
+
+static int __init enable_hdmi_setup(char *str)
+{
+ g_enable_hdmi = true;
+
+ return 1;
+}
+
+__setup("hdmi", enable_hdmi_setup);
+
+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)
@@ -47,6 +66,16 @@ int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev)
if (ret)
goto fail_connector;
+ if (g_enable_hdmi) {
+ ret = fsl_dcu_drm_hdmienc_create(fsl_dev, &fsl_dev->crtc);
+ if (ret)
+ return ret;
+
+ ret = fsl_dcu_drm_hdmienc_attach_bridge(fsl_dev);
+ if (ret)
+ return ret;
+ }
+
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..8915b07 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_output.h
@@ -29,5 +29,9 @@ 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_hdmienc_attach_bridge(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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