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path: root/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c
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Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c')
-rw-r--r--drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c
new file mode 100644
index 000000000000..70e20bd47ce4
--- /dev/null
+++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2c_engine.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2012-15 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 "dm_services.h"
+
+/*
+ * Pre-requisites: headers required by header of this unit
+ */
+#include "include/i2caux_interface.h"
+#include "engine.h"
+
+/*
+ * Header of this unit
+ */
+
+#include "i2c_engine.h"
+
+/*
+ * Post-requisites: headers required by this unit
+ */
+
+/*
+ * This unit
+ */
+
+#define FROM_ENGINE(ptr) \
+ container_of((ptr), struct i2c_engine, base)
+
+bool dal_i2c_engine_acquire(
+ struct engine *engine,
+ struct ddc *ddc_handle)
+{
+ struct i2c_engine *i2c_engine = FROM_ENGINE(engine);
+
+ uint32_t counter = 0;
+ bool result;
+
+ do {
+ result = i2c_engine->funcs->acquire_engine(
+ i2c_engine, ddc_handle);
+
+ if (result)
+ break;
+
+ /* i2c_engine is busy by VBios, lets wait and retry */
+
+ udelay(10);
+
+ ++counter;
+ } while (counter < 2);
+
+ if (result) {
+ if (!i2c_engine->funcs->setup_engine(i2c_engine)) {
+ engine->funcs->release_engine(engine);
+ result = false;
+ }
+ }
+
+ return result;
+}
+
+bool dal_i2c_engine_setup_i2c_engine(
+ struct i2c_engine *engine)
+{
+ /* Derivative classes do not have to override this */
+
+ return true;
+}
+
+void dal_i2c_engine_submit_channel_request(
+ struct i2c_engine *engine,
+ struct i2c_request_transaction_data *request)
+{
+
+}
+
+void dal_i2c_engine_process_channel_reply(
+ struct i2c_engine *engine,
+ struct i2c_reply_transaction_data *reply)
+{
+
+}
+
+void dal_i2c_engine_construct(
+ struct i2c_engine *engine,
+ struct dc_context *ctx)
+{
+ dal_i2caux_construct_engine(&engine->base, ctx);
+ engine->timeout_delay = 0;
+}
+
+void dal_i2c_engine_destruct(
+ struct i2c_engine *engine)
+{
+ dal_i2caux_destruct_engine(&engine->base);
+}