drm/amd/display: Change offset_to_id to reflect what id_to_offset returns

id_to_offset does not point to the same reg offset that offset_to_id checks for,
causing unintended asserts
Signed-off-by: Murton Liu <murton.liu@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/gpio/dcn20/hw_translate_dcn20.c

@@ -71,7 +71,7 @@ static bool offset_to_id(
 {
 	switch (offset) {
 	/* GENERIC */
-	case REG(DC_GENERICA):
+	case REG(DC_GPIO_GENERIC_A):
 		*id = GPIO_ID_GENERIC;
 		switch (mask) {
 		case DC_GPIO_GENERIC_A__DC_GPIO_GENERICA_A_MASK:

drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c

@@ -150,14 +150,10 @@ struct gpio *dal_gpio_service_create_generic_mux(
 	uint32_t en;
 	struct gpio *generic;
 
-	if (mask == 1)
-		en = GPIO_GENERIC_A;
-	else if (mask == 0x00000100L)
-		en = GPIO_GENERIC_B;
-	else
+	if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
+		ASSERT_CRITICAL(false);
 		return NULL;
-
-	id = GPIO_ID_GENERIC;
+	}
 
 	generic = dal_gpio_create(
 		service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);