summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/arm/display/komeda/komeda_dev.c
blob: ca3599e4a4d3013d2462abe2206d136e0408cb6d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
// SPDX-License-Identifier: GPL-2.0
/*
 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
 * Author: James.Qian.Wang <james.qian.wang@arm.com>
 *
 */
#include <linux/io.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#ifdef CONFIG_DEBUG_FS
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#endif

#include <drm/drm_print.h>

#include "komeda_dev.h"

static int komeda_register_show(struct seq_file *sf, void *x)
{
	struct komeda_dev *mdev = sf->private;
	int i;

	if (mdev->funcs->dump_register)
		mdev->funcs->dump_register(mdev, sf);

	for (i = 0; i < mdev->n_pipelines; i++)
		komeda_pipeline_dump_register(mdev->pipelines[i], sf);

	return 0;
}

static int komeda_register_open(struct inode *inode, struct file *filp)
{
	return single_open(filp, komeda_register_show, inode->i_private);
}

static const struct file_operations komeda_register_fops = {
	.owner		= THIS_MODULE,
	.open		= komeda_register_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

#ifdef CONFIG_DEBUG_FS
static void komeda_debugfs_init(struct komeda_dev *mdev)
{
	if (!debugfs_initialized())
		return;

	mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
	if (IS_ERR_OR_NULL(mdev->debugfs_root))
		return;

	debugfs_create_file("register", 0444, mdev->debugfs_root,
			    mdev, &komeda_register_fops);
}
#endif

static ssize_t
core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct komeda_dev *mdev = dev_to_mdev(dev);

	return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
}
static DEVICE_ATTR_RO(core_id);

static ssize_t
config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct komeda_dev *mdev = dev_to_mdev(dev);
	struct komeda_pipeline *pipe = mdev->pipelines[0];
	union komeda_config_id config_id;
	int i;

	memset(&config_id, 0, sizeof(config_id));

	config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
	config_id.n_pipelines = mdev->n_pipelines;
	config_id.n_scalers = pipe->n_scalers;
	config_id.n_layers = pipe->n_layers;
	config_id.n_richs = 0;
	for (i = 0; i < pipe->n_layers; i++) {
		if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
			config_id.n_richs++;
	}
	return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
}
static DEVICE_ATTR_RO(config_id);

static struct attribute *komeda_sysfs_entries[] = {
	&dev_attr_core_id.attr,
	&dev_attr_config_id.attr,
	NULL,
};

static struct attribute_group komeda_sysfs_attr_group = {
	.attrs = komeda_sysfs_entries,
};

static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
{
	struct komeda_pipeline *pipe;
	struct clk *clk;
	u32 pipe_id;
	int ret = 0;

	ret = of_property_read_u32(np, "reg", &pipe_id);
	if (ret != 0 || pipe_id >= mdev->n_pipelines)
		return -EINVAL;

	pipe = mdev->pipelines[pipe_id];

	clk = of_clk_get_by_name(np, "aclk");
	if (IS_ERR(clk)) {
		DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id);
		return PTR_ERR(clk);
	}
	pipe->aclk = clk;

	clk = of_clk_get_by_name(np, "pxclk");
	if (IS_ERR(clk)) {
		DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
		return PTR_ERR(clk);
	}
	pipe->pxlclk = clk;

	/* enum ports */
	pipe->of_output_dev =
		of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
	pipe->of_output_port =
		of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);

	pipe->of_node = np;

	return 0;
}

static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct device_node *child, *np = dev->of_node;
	struct clk *clk;
	int ret;

	clk = devm_clk_get(dev, "mclk");
	if (IS_ERR(clk))
		return PTR_ERR(clk);

	mdev->mclk = clk;
	mdev->irq  = platform_get_irq(pdev, 0);
	if (mdev->irq < 0) {
		DRM_ERROR("could not get IRQ number.\n");
		return mdev->irq;
	}

	for_each_available_child_of_node(np, child) {
		if (of_node_cmp(child->name, "pipeline") == 0) {
			ret = komeda_parse_pipe_dt(mdev, child);
			if (ret) {
				DRM_ERROR("parse pipeline dt error!\n");
				of_node_put(child);
				break;
			}
		}
	}

	return ret;
}

struct komeda_dev *komeda_dev_create(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	const struct komeda_product_data *product;
	struct komeda_dev *mdev;
	struct resource *io_res;
	int err = 0;

	product = of_device_get_match_data(dev);
	if (!product)
		return ERR_PTR(-ENODEV);

	io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!io_res) {
		DRM_ERROR("No registers defined.\n");
		return ERR_PTR(-ENODEV);
	}

	mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
	if (!mdev)
		return ERR_PTR(-ENOMEM);

	mutex_init(&mdev->lock);

	mdev->dev = dev;
	mdev->reg_base = devm_ioremap_resource(dev, io_res);
	if (IS_ERR(mdev->reg_base)) {
		DRM_ERROR("Map register space failed.\n");
		err = PTR_ERR(mdev->reg_base);
		mdev->reg_base = NULL;
		goto err_cleanup;
	}

	mdev->pclk = devm_clk_get(dev, "pclk");
	if (IS_ERR(mdev->pclk)) {
		DRM_ERROR("Get APB clk failed.\n");
		err = PTR_ERR(mdev->pclk);
		mdev->pclk = NULL;
		goto err_cleanup;
	}

	/* Enable APB clock to access the registers */
	clk_prepare_enable(mdev->pclk);

	mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
	if (!komeda_product_match(mdev, product->product_id)) {
		DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
			  product->product_id,
			  MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
		err = -ENODEV;
		goto err_cleanup;
	}

	DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
		 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
		 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
		 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));

	mdev->funcs->init_format_table(mdev);

	err = mdev->funcs->enum_resources(mdev);
	if (err) {
		DRM_ERROR("enumerate display resource failed.\n");
		goto err_cleanup;
	}

	err = komeda_parse_dt(dev, mdev);
	if (err) {
		DRM_ERROR("parse device tree failed.\n");
		goto err_cleanup;
	}

	err = komeda_assemble_pipelines(mdev);
	if (err) {
		DRM_ERROR("assemble display pipelines failed.\n");
		goto err_cleanup;
	}

	err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
	if (err) {
		DRM_ERROR("create sysfs group failed.\n");
		goto err_cleanup;
	}

#ifdef CONFIG_DEBUG_FS
	komeda_debugfs_init(mdev);
#endif

	return mdev;

err_cleanup:
	komeda_dev_destroy(mdev);
	return ERR_PTR(err);
}

void komeda_dev_destroy(struct komeda_dev *mdev)
{
	struct device *dev = mdev->dev;
	struct komeda_dev_funcs *funcs = mdev->funcs;
	int i;

	sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);

#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(mdev->debugfs_root);
#endif

	for (i = 0; i < mdev->n_pipelines; i++) {
		komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
		mdev->pipelines[i] = NULL;
	}

	mdev->n_pipelines = 0;

	if (funcs && funcs->cleanup)
		funcs->cleanup(mdev);

	if (mdev->reg_base) {
		devm_iounmap(dev, mdev->reg_base);
		mdev->reg_base = NULL;
	}

	if (mdev->mclk) {
		devm_clk_put(dev, mdev->mclk);
		mdev->mclk = NULL;
	}

	if (mdev->pclk) {
		clk_disable_unprepare(mdev->pclk);
		devm_clk_put(dev, mdev->pclk);
		mdev->pclk = NULL;
	}

	devm_kfree(dev, mdev);
}