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      1 /*	$NetBSD: amdgpu_dce_i2c.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2018 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: AMD
     25  *
     26  */
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: amdgpu_dce_i2c.c,v 1.2 2021/12/18 23:45:02 riastradh Exp $");
     29 
     30 #include "dce_i2c.h"
     31 #include "reg_helper.h"
     32 
     33 bool dce_i2c_submit_command(
     34 	struct resource_pool *pool,
     35 	struct ddc *ddc,
     36 	struct i2c_command *cmd)
     37 {
     38 	struct dce_i2c_hw *dce_i2c_hw;
     39 	struct dce_i2c_sw dce_i2c_sw = {0};
     40 
     41 	if (!ddc) {
     42 		BREAK_TO_DEBUGGER();
     43 		return false;
     44 	}
     45 
     46 	if (!cmd) {
     47 		BREAK_TO_DEBUGGER();
     48 		return false;
     49 	}
     50 
     51 	dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc);
     52 
     53 	if (dce_i2c_hw)
     54 		return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw);
     55 
     56 	dce_i2c_sw.ctx = ddc->ctx;
     57 	if (dce_i2c_engine_acquire_sw(&dce_i2c_sw, ddc)) {
     58 		return dce_i2c_submit_command_sw(pool, ddc, cmd, &dce_i2c_sw);
     59 	}
     60 
     61 	return false;
     62 }
     63