41 static int edp_msg_fifo_tx(struct edp_aux *aux, struct drm_dp_aux_msg *msg)  in edp_msg_fifo_tx()  argument
75 		edp_write(aux->base + REG_EDP_AUX_DATA, reg);  in edp_msg_fifo_tx()
83 	edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, reg);  in edp_msg_fifo_tx()
88 static int edp_msg_fifo_rx(struct edp_aux *aux, struct drm_dp_aux_msg *msg)  in edp_msg_fifo_rx()  argument
95 	edp_write(aux->base + REG_EDP_AUX_DATA,  in edp_msg_fifo_rx()
101 	data = edp_read(aux->base + REG_EDP_AUX_DATA);  in edp_msg_fifo_rx()
103 		data = edp_read(aux->base + REG_EDP_AUX_DATA);  in edp_msg_fifo_rx()
120 	struct edp_aux *aux = to_edp_aux(drm_aux);  in edp_aux_transfer()  local
140 	mutex_lock(&aux->msg_mutex);  in edp_aux_transfer()
142 	aux->msg_err = false;  in edp_aux_transfer()
143 	reinit_completion(&aux->msg_comp);  in edp_aux_transfer()
145 	ret = edp_msg_fifo_tx(aux, msg);  in edp_aux_transfer()
150 	ret = wait_for_completion_timeout(&aux->msg_comp, 300);  in edp_aux_transfer()
156 		edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, 0);  in edp_aux_transfer()
157 		msm_edp_aux_ctrl(aux, 1);  in edp_aux_transfer()
163 	if (!aux->msg_err) {  in edp_aux_transfer()
165 			ret = edp_msg_fifo_rx(aux, msg);  in edp_aux_transfer()
187 	mutex_unlock(&aux->msg_mutex);  in edp_aux_transfer()
194 	struct edp_aux *aux = NULL;  in msm_edp_aux_init()  local
198 	aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL);  in msm_edp_aux_init()
199 	if (!aux)  in msm_edp_aux_init()
202 	aux->base = regbase;  in msm_edp_aux_init()
203 	mutex_init(&aux->msg_mutex);  in msm_edp_aux_init()
204 	init_completion(&aux->msg_comp);  in msm_edp_aux_init()
206 	aux->drm_aux.name = "msm_edp_aux";  in msm_edp_aux_init()
207 	aux->drm_aux.dev = dev;  in msm_edp_aux_init()
208 	aux->drm_aux.transfer = edp_aux_transfer;  in msm_edp_aux_init()
209 	ret = drm_dp_aux_register(&aux->drm_aux);  in msm_edp_aux_init()
212 		mutex_destroy(&aux->msg_mutex);  in msm_edp_aux_init()
215 	if (drm_aux && aux)  in msm_edp_aux_init()
216 		*drm_aux = &aux->drm_aux;  in msm_edp_aux_init()
218 	return aux;  in msm_edp_aux_init()
221 void msm_edp_aux_destroy(struct device *dev, struct edp_aux *aux)  in msm_edp_aux_destroy()  argument
223 	if (aux) {  in msm_edp_aux_destroy()
224 		drm_dp_aux_unregister(&aux->drm_aux);  in msm_edp_aux_destroy()
225 		mutex_destroy(&aux->msg_mutex);  in msm_edp_aux_destroy()
229 irqreturn_t msm_edp_aux_irq(struct edp_aux *aux, u32 isr)  in msm_edp_aux_irq()  argument
233 		edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, 0);  in msm_edp_aux_irq()
236 			aux->msg_err = true;  in msm_edp_aux_irq()
238 			aux->msg_err = false;  in msm_edp_aux_irq()
240 		complete(&aux->msg_comp);  in msm_edp_aux_irq()
246 void msm_edp_aux_ctrl(struct edp_aux *aux, int enable)  in msm_edp_aux_ctrl()  argument
251 	data = edp_read(aux->base + REG_EDP_AUX_CTRL);  in msm_edp_aux_ctrl()
255 		edp_write(aux->base + REG_EDP_AUX_CTRL, data);  in msm_edp_aux_ctrl()
262 		edp_write(aux->base + REG_EDP_AUX_CTRL, data);  in msm_edp_aux_ctrl()
265 		edp_write(aux->base + REG_EDP_AUX_CTRL, data);  in msm_edp_aux_ctrl()