1 // SPDX-License-Identifier: MIT
13  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
24 #include <linux/i2c-algo-bit.h>
25 #include <linux/i2c.h>
42 	struct ast_ddc *ddc = data;  in ast_ddc_algo_bit_data_setsda()  local
43 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_setsda()
58 	struct ast_ddc *ddc = data;  in ast_ddc_algo_bit_data_setscl()  local
59 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_setscl()
74 	struct ast_ddc *ddc = i2c_get_adapdata(adapter);  in ast_ddc_algo_bit_data_pre_xfer()  local
75 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_pre_xfer()
79 	 * by acquiring the I/O-register lock.  in ast_ddc_algo_bit_data_pre_xfer()
81 	mutex_lock(&ast->modeset_lock);  in ast_ddc_algo_bit_data_pre_xfer()
88 	struct ast_ddc *ddc = i2c_get_adapdata(adapter);  in ast_ddc_algo_bit_data_post_xfer()  local
89 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_post_xfer()
91 	mutex_unlock(&ast->modeset_lock);  in ast_ddc_algo_bit_data_post_xfer()
96 	struct ast_ddc *ddc = data;  in ast_ddc_algo_bit_data_getsda()  local
97 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_getsda()
118 	struct ast_ddc *ddc = data;  in ast_ddc_algo_bit_data_getscl()  local
119 	struct ast_device *ast = ddc->ast;  in ast_ddc_algo_bit_data_getscl()
140 	struct ast_ddc *ddc = res;  in ast_ddc_release()  local
142 	i2c_del_adapter(&ddc->adapter);  in ast_ddc_release()
147 	struct drm_device *dev = &ast->base;  in ast_ddc_create()
148 	struct ast_ddc *ddc;  in ast_ddc_create()  local
153 	ddc = drmm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);  in ast_ddc_create()
154 	if (!ddc)  in ast_ddc_create()
155 		return ERR_PTR(-ENOMEM);  in ast_ddc_create()
156 	ddc->ast = ast;  in ast_ddc_create()
158 	bit = &ddc->bit;  in ast_ddc_create()
159 	bit->data = ddc;  in ast_ddc_create()
160 	bit->setsda = ast_ddc_algo_bit_data_setsda;  in ast_ddc_create()
161 	bit->setscl = ast_ddc_algo_bit_data_setscl;  in ast_ddc_create()
162 	bit->getsda = ast_ddc_algo_bit_data_getsda;  in ast_ddc_create()
163 	bit->getscl = ast_ddc_algo_bit_data_getscl;  in ast_ddc_create()
164 	bit->pre_xfer = ast_ddc_algo_bit_data_pre_xfer;  in ast_ddc_create()
165 	bit->post_xfer = ast_ddc_algo_bit_data_post_xfer;  in ast_ddc_create()
166 	bit->udelay = 20;  in ast_ddc_create()
167 	bit->timeout = usecs_to_jiffies(2200);  in ast_ddc_create()
169 	adapter = &ddc->adapter;  in ast_ddc_create()
170 	adapter->owner = THIS_MODULE;  in ast_ddc_create()
171 	adapter->algo_data = bit;  in ast_ddc_create()
172 	adapter->dev.parent = dev->dev;  in ast_ddc_create()
173 	snprintf(adapter->name, sizeof(adapter->name), "AST DDC bus");  in ast_ddc_create()
174 	i2c_set_adapdata(adapter, ddc);  in ast_ddc_create()
178 		drm_err(dev, "Failed to register bit i2c\n");  in ast_ddc_create()
182 	ret = drmm_add_action_or_reset(dev, ast_ddc_release, ddc);  in ast_ddc_create()
186 	return &ddc->adapter;  in ast_ddc_create()