drm/amd/display: Create new i2c resource

[Why]
I2C code did not match dc resource model and was generally
unpleasant

[How]
Move code into new svelte dce_i2c files, replacing various i2c
objects with two structs: dce_i2c_sw and dce_i2c_hw.  Fully split
sw and hw code paths.  Remove all redundant declarations.  Use
address lists to distinguish between versions.  Change dce80 code
to newer register access macros.

Signed-off-by: David Francis <David.Francis@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.c b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.c
new file mode 100644
index 000000000000..35a75398fcb4
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: AMD
+ *
+ */
+#include "dce_i2c.h"
+#include "reg_helper.h"
+
+bool dce_i2c_submit_command(
+	struct resource_pool *pool,
+	struct ddc *ddc,
+	struct i2c_command *cmd)
+{
+	struct dce_i2c_hw *dce_i2c_hw;
+	struct dce_i2c_sw *dce_i2c_sw;
+
+	if (!ddc) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	if (!cmd) {
+		BREAK_TO_DEBUGGER();
+		return false;
+	}
+
+	/* The software engine is only available on dce8 */
+	dce_i2c_sw = dce_i2c_acquire_i2c_sw_engine(pool, ddc);
+
+	if (!dce_i2c_sw) {
+		dce_i2c_hw = acquire_i2c_hw_engine(pool, ddc);
+
+		if (!dce_i2c_hw)
+			return false;
+
+		return dce_i2c_submit_command_hw(pool, ddc, cmd, dce_i2c_hw);
+	}
+
+	return dce_i2c_submit_command_sw(pool, ddc, cmd, dce_i2c_sw);
+
+}