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drm/amd/display: add oem i2c implemenation in dc

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[why]
Need it for some OEM I2C devices in Nv10

[how]
Link up code to parse OEM table and expose DC interface
to access the pins

Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jun Lei
2019-08-02 17:22:57 -04:00
committed by Alex Deucher
parent ae8cf9774e
commit d9a07577b8
11 changed files with 100 additions and 83 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
View File

@@ -294,11 +294,21 @@ static enum bp_result bios_parser_get_i2c_info(struct dc_bios *dcb,
struct atom_display_object_path_v2 *object;
struct atom_common_record_header *header;
struct atom_i2c_record *record;
struct atom_i2c_record dummy_record = {0};
struct bios_parser *bp = BP_FROM_DCB(dcb);
if (!info)
return BP_RESULT_BADINPUT;
if (id.type == OBJECT_TYPE_GENERIC) {
dummy_record.i2c_id = id.id;
if (get_gpio_i2c_info(bp, &dummy_record, info) == BP_RESULT_OK)
return BP_RESULT_OK;
else
return BP_RESULT_NORECORD;
}
object = get_bios_object(bp, id);
if (!object)
@@ -341,6 +351,7 @@ static enum bp_result get_gpio_i2c_info(
struct atom_gpio_pin_lut_v2_1 *header;
uint32_t count = 0;
unsigned int table_index = 0;
bool find_valid = false;
if (!info)
return BP_RESULT_BADINPUT;
@@ -368,33 +379,28 @@ static enum bp_result get_gpio_i2c_info(
- sizeof(struct atom_common_table_header))
/ sizeof(struct atom_gpio_pin_assignment);
table_index = record->i2c_id & I2C_HW_LANE_MUX;
if (count < table_index) {
bool find_valid = false;
for (table_index = 0; table_index < count; table_index++) {
if (((record->i2c_id & I2C_HW_CAP) == (
header->gpio_pin[table_index].gpio_id &
I2C_HW_CAP)) &&
((record->i2c_id & I2C_HW_ENGINE_ID_MASK) ==
(header->gpio_pin[table_index].gpio_id &
I2C_HW_ENGINE_ID_MASK)) &&
((record->i2c_id & I2C_HW_LANE_MUX) ==
(header->gpio_pin[table_index].gpio_id &
I2C_HW_LANE_MUX))) {
/* still valid */
find_valid = true;
break;
}
for (table_index = 0; table_index < count; table_index++) {
if (((record->i2c_id & I2C_HW_CAP) == (
header->gpio_pin[table_index].gpio_id &
I2C_HW_CAP)) &&
((record->i2c_id & I2C_HW_ENGINE_ID_MASK) ==
(header->gpio_pin[table_index].gpio_id &
I2C_HW_ENGINE_ID_MASK)) &&
((record->i2c_id & I2C_HW_LANE_MUX) ==
(header->gpio_pin[table_index].gpio_id &
I2C_HW_LANE_MUX))) {
/* still valid */
find_valid = true;
break;
}
/* If we don't find the entry that we are looking for then
* we will return BP_Result_BadBiosTable.
*/
if (find_valid == false)
return BP_RESULT_BADBIOSTABLE;
}
/* If we don't find the entry that we are looking for then
* we will return BP_Result_BadBiosTable.
*/
if (find_valid == false)
return BP_RESULT_BADBIOSTABLE;
/* get the GPIO_I2C_INFO */
info->i2c_hw_assist = (record->i2c_id & I2C_HW_CAP) ? true : false;
info->i2c_line = record->i2c_id & I2C_HW_LANE_MUX;
@@ -1205,6 +1211,8 @@ static enum bp_result get_firmware_info_v3_1(
bp->cmd_tbl.get_smu_clock_info(bp, SMU9_SYSPLL0_ID) * 10;
}
info->oem_i2c_present = false;
return BP_RESULT_OK;
}
@@ -1283,6 +1291,13 @@ static enum bp_result get_firmware_info_v3_2(
bp->cmd_tbl.get_smu_clock_info(bp, SMU11_SYSPLL3_0_ID) * 10;
}
if (firmware_info->board_i2c_feature_id == 0x2) {
info->oem_i2c_present = true;
info->oem_i2c_obj_id = firmware_info->board_i2c_feature_gpio_id;
} else {
info->oem_i2c_present = false;
}
return BP_RESULT_OK;
}