From: David Francis <david.fran...@amd.com>
[Why]
The i2c code contains two structs that contain the same
information as i2c_payload
[How]
Replace references to those structs with references to
i2c_payload
dce_i2c_transaction_request->status was written to but never read,
so all references to it are removed
Signed-off-by: David Francis <david.fran...@amd.com>
Reviewed-by: Jordan Lazare <jordan.laz...@amd.com>
Acked-by: Leo Li <sunpeng...@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h | 33 ----------
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c | 84 +++++--------------------
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h | 5 --
drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.c | 83 ++++--------------------
4 files changed, 28 insertions(+), 177 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h
b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h
index d655f89..a171c5c 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c.h
@@ -30,39 +30,6 @@
#include "dce_i2c_hw.h"
#include "dce_i2c_sw.h"
-enum dce_i2c_transaction_status {
- DCE_I2C_TRANSACTION_STATUS_UNKNOWN = (-1L),
- DCE_I2C_TRANSACTION_STATUS_SUCCEEDED,
- DCE_I2C_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY,
- DCE_I2C_TRANSACTION_STATUS_FAILED_TIMEOUT,
- DCE_I2C_TRANSACTION_STATUS_FAILED_PROTOCOL_ERROR,
- DCE_I2C_TRANSACTION_STATUS_FAILED_NACK,
- DCE_I2C_TRANSACTION_STATUS_FAILED_INCOMPLETE,
- DCE_I2C_TRANSACTION_STATUS_FAILED_OPERATION,
- DCE_I2C_TRANSACTION_STATUS_FAILED_INVALID_OPERATION,
- DCE_I2C_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW,
- DCE_I2C_TRANSACTION_STATUS_FAILED_HPD_DISCON
-};
-
-enum dce_i2c_transaction_operation {
- DCE_I2C_TRANSACTION_READ,
- DCE_I2C_TRANSACTION_WRITE
-};
-
-struct dce_i2c_transaction_payload {
- enum dce_i2c_transaction_address_space address_space;
- uint32_t address;
- uint32_t length;
- uint8_t *data;
-};
-
-struct dce_i2c_transaction_request {
- enum dce_i2c_transaction_operation operation;
- struct dce_i2c_transaction_payload payload;
- enum dce_i2c_transaction_status status;
-};
-
-
bool dce_i2c_submit_command(
struct resource_pool *pool,
struct ddc *ddc,
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
index cd7da59..2800d3f 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c
@@ -129,7 +129,7 @@ static uint32_t get_speed(
static void process_channel_reply(
struct dce_i2c_hw *dce_i2c_hw,
- struct i2c_reply_transaction_data *reply)
+ struct i2c_payload *reply)
{
uint32_t length = reply->length;
uint8_t *buffer = reply->data;
@@ -522,9 +522,9 @@ static uint32_t get_transaction_timeout_hw(
return period_timeout * num_of_clock_stretches;
}
-bool dce_i2c_hw_engine_submit_request(
+bool dce_i2c_hw_engine_submit_payload(
struct dce_i2c_hw *dce_i2c_hw,
- struct dce_i2c_transaction_request *dce_i2c_request,
+ struct i2c_payload *payload,
bool middle_of_transaction)
{
@@ -541,46 +541,36 @@ bool dce_i2c_hw_engine_submit_request(
* the number of free bytes in HW buffer (minus one for address)
*/
- if (dce_i2c_request->payload.length >=
+ if (payload->length >=
get_hw_buffer_available_size(dce_i2c_hw)) {
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_BUFFER_OVERFLOW;
return false;
}
- if (dce_i2c_request->operation == DCE_I2C_TRANSACTION_READ)
+ if (!payload->write)
request.action = middle_of_transaction ?
DCE_I2C_TRANSACTION_ACTION_I2C_READ_MOT :
DCE_I2C_TRANSACTION_ACTION_I2C_READ;
- else if (dce_i2c_request->operation == DCE_I2C_TRANSACTION_WRITE)
+ else
request.action = middle_of_transaction ?
DCE_I2C_TRANSACTION_ACTION_I2C_WRITE_MOT :
DCE_I2C_TRANSACTION_ACTION_I2C_WRITE;
- else {
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
- /* [anaumov] in DAL2, there was no "return false" */
- return false;
- }
- request.address = (uint8_t) dce_i2c_request->payload.address;
- request.length = dce_i2c_request->payload.length;
- request.data = dce_i2c_request->payload.data;
+
+ request.address = (uint8_t) ((payload->address << 1) | !payload->write);
+ request.length = payload->length;
+ request.data = payload->data;
/* obtain timeout value before submitting request */
transaction_timeout = get_transaction_timeout_hw(
- dce_i2c_hw, dce_i2c_request->payload.length + 1);
+ dce_i2c_hw, payload->length + 1);
submit_channel_request_hw(
dce_i2c_hw, &request);
if ((request.status == I2C_CHANNEL_OPERATION_FAILED) ||
- (request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY)) {
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
+ (request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY))
return false;
- }
/* wait until transaction proceed */
@@ -591,37 +581,11 @@ bool dce_i2c_hw_engine_submit_request(
/* update transaction status */
- switch (operation_result) {
- case I2C_CHANNEL_OPERATION_SUCCEEDED:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_SUCCEEDED;
+ if (operation_result == I2C_CHANNEL_OPERATION_SUCCEEDED)
result = true;
- break;
- case I2C_CHANNEL_OPERATION_NO_RESPONSE:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_NACK;
- break;
- case I2C_CHANNEL_OPERATION_TIMEOUT:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_TIMEOUT;
- break;
- case I2C_CHANNEL_OPERATION_FAILED:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_INCOMPLETE;
- break;
- default:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_OPERATION;
- }
- if (result && (dce_i2c_request->operation == DCE_I2C_TRANSACTION_READ))
{
- struct i2c_reply_transaction_data reply;
-
- reply.data = dce_i2c_request->payload.data;
- reply.length = dce_i2c_request->payload.length;
-
- process_channel_reply(dce_i2c_hw, &reply);
- }
+ if (result && (!payload->write))
+ process_channel_reply(dce_i2c_hw, payload);
return result;
}
@@ -644,22 +608,8 @@ bool dce_i2c_submit_command_hw(
struct i2c_payload *payload = cmd->payloads + index_of_payload;
- struct dce_i2c_transaction_request request = { 0 };
-
- request.operation = payload->write ?
- DCE_I2C_TRANSACTION_WRITE :
- DCE_I2C_TRANSACTION_READ;
-
- request.payload.address_space =
- DCE_I2C_TRANSACTION_ADDRESS_SPACE_I2C;
- request.payload.address = (payload->address << 1) |
- !payload->write;
- request.payload.length = payload->length;
- request.payload.data = payload->data;
-
-
- if (!dce_i2c_hw_engine_submit_request(
- dce_i2c_hw, &request, mot)) {
+ if (!dce_i2c_hw_engine_submit_payload(
+ dce_i2c_hw, payload, mot)) {
result = false;
break;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h
b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h
index 742c1da..7f19bb4 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h
@@ -236,11 +236,6 @@ struct i2c_request_transaction_data {
uint8_t *data;
};
-struct i2c_reply_transaction_data {
- uint32_t length;
- uint8_t *data;
-};
-
struct dce_i2c_hw {
struct ddc *ddc;
uint32_t original_speed;
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.c
b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.c
index ab11129..f026669 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_i2c_sw.c
@@ -70,13 +70,6 @@ static void release_engine_dce_sw(
dce_i2c_sw->ddc = NULL;
}
-enum i2c_channel_operation_result dce_i2c_sw_engine_get_channel_status(
- struct dce_i2c_sw *engine,
- uint8_t *returned_bytes)
-{
- /* No arbitration with VBIOS is performed since DCE 6.0 */
- return I2C_CHANNEL_OPERATION_SUCCEEDED;
-}
static bool get_hw_supported_ddc_line(
struct ddc *ddc,
enum gpio_ddc_line *line)
@@ -469,73 +462,33 @@ void dce_i2c_sw_engine_submit_channel_request(
I2C_CHANNEL_OPERATION_SUCCEEDED :
I2C_CHANNEL_OPERATION_FAILED;
}
-bool dce_i2c_sw_engine_submit_request(
+bool dce_i2c_sw_engine_submit_payload(
struct dce_i2c_sw *engine,
- struct dce_i2c_transaction_request *dce_i2c_request,
+ struct i2c_payload *payload,
bool middle_of_transaction)
{
struct i2c_request_transaction_data request;
- bool operation_succeeded = false;
- if (dce_i2c_request->operation == DCE_I2C_TRANSACTION_READ)
+ if (!payload->write)
request.action = middle_of_transaction ?
DCE_I2C_TRANSACTION_ACTION_I2C_READ_MOT :
DCE_I2C_TRANSACTION_ACTION_I2C_READ;
- else if (dce_i2c_request->operation == DCE_I2C_TRANSACTION_WRITE)
+ else
request.action = middle_of_transaction ?
DCE_I2C_TRANSACTION_ACTION_I2C_WRITE_MOT :
DCE_I2C_TRANSACTION_ACTION_I2C_WRITE;
- else {
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_INVALID_OPERATION;
- /* in DAL2, there was no "return false" */
- return false;
- }
- request.address = (uint8_t)dce_i2c_request->payload.address;
- request.length = dce_i2c_request->payload.length;
- request.data = dce_i2c_request->payload.data;
+ request.address = (uint8_t) ((payload->address << 1) | !payload->write);
+ request.length = payload->length;
+ request.data = payload->data;
dce_i2c_sw_engine_submit_channel_request(engine, &request);
if ((request.status == I2C_CHANNEL_OPERATION_ENGINE_BUSY) ||
(request.status == I2C_CHANNEL_OPERATION_FAILED))
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_CHANNEL_BUSY;
- else {
- enum i2c_channel_operation_result operation_result;
-
- do {
- operation_result =
- dce_i2c_sw_engine_get_channel_status(engine,
NULL);
-
- switch (operation_result) {
- case I2C_CHANNEL_OPERATION_SUCCEEDED:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_SUCCEEDED;
- operation_succeeded = true;
- break;
- case I2C_CHANNEL_OPERATION_NO_RESPONSE:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_NACK;
- break;
- case I2C_CHANNEL_OPERATION_TIMEOUT:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_TIMEOUT;
- break;
- case I2C_CHANNEL_OPERATION_FAILED:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_INCOMPLETE;
- break;
- default:
- dce_i2c_request->status =
- DCE_I2C_TRANSACTION_STATUS_FAILED_OPERATION;
- break;
- }
- } while (operation_result == I2C_CHANNEL_OPERATION_ENGINE_BUSY);
- }
+ return false;
- return operation_succeeded;
+ return true;
}
bool dce_i2c_submit_command_sw(
struct resource_pool *pool,
@@ -555,22 +508,8 @@ bool dce_i2c_submit_command_sw(
struct i2c_payload *payload = cmd->payloads + index_of_payload;
- struct dce_i2c_transaction_request request = { 0 };
-
- request.operation = payload->write ?
- DCE_I2C_TRANSACTION_WRITE :
- DCE_I2C_TRANSACTION_READ;
-
- request.payload.address_space =
- DCE_I2C_TRANSACTION_ADDRESS_SPACE_I2C;
- request.payload.address = (payload->address << 1) |
- !payload->write;
- request.payload.length = payload->length;
- request.payload.data = payload->data;
-
-
- if (!dce_i2c_sw_engine_submit_request(
- dce_i2c_sw, &request, mot)) {
+ if (!dce_i2c_sw_engine_submit_payload(
+ dce_i2c_sw, payload, mot)) {
result = false;
break;
}
--
2.7.4
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