1 // SPDX-License-Identifier: GPL-2.0-only
3  * adv7511_cec.c - Analog Devices ADV7511/33 cec driver
38 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv_cec_tx_raw_status()
41 	if (regmap_read(adv7511->regmap_cec,  in adv_cec_tx_raw_status()
49 		drm_connector_hdmi_cec_transmit_attempt_done(adv7511->cec_connector,  in adv_cec_tx_raw_status()
65 		if (regmap_read(adv7511->regmap_cec,  in adv_cec_tx_raw_status()
77 		drm_connector_hdmi_cec_transmit_done(adv7511->cec_connector, status,  in adv_cec_tx_raw_status()
83 		drm_connector_hdmi_cec_transmit_attempt_done(adv7511->cec_connector,  in adv_cec_tx_raw_status()
91 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_rx()
97 	if (regmap_read(adv7511->regmap_cec,  in adv7511_cec_rx()
110 		regmap_read(adv7511->regmap_cec,  in adv7511_cec_rx()
116 	/* Toggle RX Ready Clear bit to re-enable this RX buffer */  in adv7511_cec_rx()
117 	regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_rx()
120 	regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_rx()
123 	drm_connector_hdmi_cec_received_msg(adv7511->cec_connector, &msg);  in adv7511_cec_rx()
128 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_irq_process()
136 	int rx_order[3] = { -1, -1, -1 };  in adv7511_cec_irq_process()
148 	if (regmap_read(adv7511->regmap_cec,  in adv7511_cec_irq_process()
163 	 * read from in order, where -1 indicates that there are no  in adv7511_cec_irq_process()
170 			rx_order[timestamp - 1] = i;  in adv7511_cec_irq_process()
186 int adv7511_cec_enable(struct drm_bridge *bridge, bool enable)  in adv7511_cec_enable()  argument
188 	struct adv7511 *adv7511 = bridge_to_adv7511(bridge);  in adv7511_cec_enable()
189 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_enable()
191 	if (adv7511->i2c_cec == NULL)  in adv7511_cec_enable()
192 		return -EIO;  in adv7511_cec_enable()
194 	if (!adv7511->cec_enabled_adap && enable) {  in adv7511_cec_enable()
196 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_enable()
199 		/* non-legacy mode and clear all rx buffers */  in adv7511_cec_enable()
200 		regmap_write(adv7511->regmap_cec,  in adv7511_cec_enable()
202 		regmap_write(adv7511->regmap_cec,  in adv7511_cec_enable()
205 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_enable()
211 		/* rx: ready 1-3 */  in adv7511_cec_enable()
212 		regmap_update_bits(adv7511->regmap,  in adv7511_cec_enable()
215 	} else if (adv7511->cec_enabled_adap && !enable) {  in adv7511_cec_enable()
216 		regmap_update_bits(adv7511->regmap,  in adv7511_cec_enable()
218 		/* disable address mask 1-3 */  in adv7511_cec_enable()
219 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_enable()
223 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_enable()
226 		adv7511->cec_valid_addrs = 0;  in adv7511_cec_enable()
228 	adv7511->cec_enabled_adap = enable;  in adv7511_cec_enable()
232 int adv7511_cec_log_addr(struct drm_bridge *bridge, u8 addr)  in adv7511_cec_log_addr()  argument
234 	struct adv7511 *adv7511 = bridge_to_adv7511(bridge);  in adv7511_cec_log_addr()
235 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_log_addr()
238 	if (!adv7511->cec_enabled_adap)  in adv7511_cec_log_addr()
239 		return addr == CEC_LOG_ADDR_INVALID ? 0 : -EIO;  in adv7511_cec_log_addr()
242 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
245 		adv7511->cec_valid_addrs = 0;  in adv7511_cec_log_addr()
250 		bool is_valid = adv7511->cec_valid_addrs & (1 << i);  in adv7511_cec_log_addr()
254 		if (is_valid && adv7511->cec_addr[i] == addr)  in adv7511_cec_log_addr()
260 			return -ENXIO;  in adv7511_cec_log_addr()
262 	adv7511->cec_addr[i] = addr;  in adv7511_cec_log_addr()
263 	adv7511->cec_valid_addrs |= 1 << i;  in adv7511_cec_log_addr()
267 		/* enable address mask 0 */  in adv7511_cec_log_addr()
268 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
272 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
277 		/* enable address mask 1 */  in adv7511_cec_log_addr()
278 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
282 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
287 		/* enable address mask 2 */  in adv7511_cec_log_addr()
288 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
292 		regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_log_addr()
300 int adv7511_cec_transmit(struct drm_bridge *bridge, u8 attempts,  in adv7511_cec_transmit()  argument
303 	struct adv7511 *adv7511 = bridge_to_adv7511(bridge);  in adv7511_cec_transmit()
304 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_transmit()
305 	u8 len = msg->len;  in adv7511_cec_transmit()
309 	 * The number of retries is the number of attempts - 1, but retry  in adv7511_cec_transmit()
313 	regmap_update_bits(adv7511->regmap_cec,  in adv7511_cec_transmit()
315 			   0x70, max(1, attempts - 1) << 4);  in adv7511_cec_transmit()
318 	regmap_update_bits(adv7511->regmap, ADV7511_REG_INT(1), 0x38, 0x38);  in adv7511_cec_transmit()
322 		regmap_write(adv7511->regmap_cec,  in adv7511_cec_transmit()
324 			     msg->msg[i]);  in adv7511_cec_transmit()
327 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_transmit()
329 	/* start transmit, enable tx */  in adv7511_cec_transmit()
330 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_transmit()
337 	adv7511->cec_clk = devm_clk_get(dev, "cec");  in adv7511_cec_parse_dt()
338 	if (IS_ERR(adv7511->cec_clk)) {  in adv7511_cec_parse_dt()
339 		int ret = PTR_ERR(adv7511->cec_clk);  in adv7511_cec_parse_dt()
341 		adv7511->cec_clk = NULL;  in adv7511_cec_parse_dt()
344 	clk_prepare_enable(adv7511->cec_clk);  in adv7511_cec_parse_dt()
345 	adv7511->cec_clk_freq = clk_get_rate(adv7511->cec_clk);  in adv7511_cec_parse_dt()
349 int adv7511_cec_init(struct drm_bridge *bridge,  in adv7511_cec_init()  argument
352 	struct adv7511 *adv7511 = bridge_to_adv7511(bridge);  in adv7511_cec_init()
353 	struct device *dev = &adv7511->i2c_main->dev;  in adv7511_cec_init()
354 	unsigned int offset = adv7511->info->reg_cec_offset;  in adv7511_cec_init()
360 	adv7511->cec_connector = connector;  in adv7511_cec_init()
362 	regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL, 0);  in adv7511_cec_init()
364 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_init()
366 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_init()
369 	/* non-legacy mode - use all three RX buffers */  in adv7511_cec_init()
370 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_init()
373 	regmap_write(adv7511->regmap_cec,  in adv7511_cec_init()
375 		     ((adv7511->cec_clk_freq / 750000) - 1) << 2);  in adv7511_cec_init()
380 	regmap_write(adv7511->regmap, ADV7511_REG_CEC_CTRL,  in adv7511_cec_init()
382 	return ret == -EPROBE_DEFER ? ret : 0;  in adv7511_cec_init()