From: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Date: Sun, 30 Apr 2017 09:20:55 -0400
Subject: drm/amd/display: i2c/aux Remove link index.
Git-commit: 46df790c6b569faffb4cc93889745a7827283749
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Link index is an unnecessery level of inderection when
calling from kernel i2c/aux transfer into DAL.

Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h                    |    6 -
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c |   38 ++++++------
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c     |   22 ++++--
 drivers/gpu/drm/amd/display/dc/core/dc.c                    |   19 +-----
 drivers/gpu/drm/amd/display/dc/core/dc_link.c               |   28 ++++----
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c            |    4 -
 drivers/gpu/drm/amd/display/dc/dc.h                         |    9 --
 drivers/gpu/drm/amd/display/dc/inc/core_types.h             |    1 
 8 files changed, 61 insertions(+), 66 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h
@@ -546,13 +546,13 @@ enum amdgpu_connector_dither {
 
 struct amdgpu_dm_dp_aux {
 	struct drm_dp_aux aux;
-	uint32_t link_index;
+	struct ddc_service *ddc_service;
 };
 
 struct amdgpu_i2c_adapter {
 	struct i2c_adapter base;
-	struct amdgpu_display_manager *dm;
-	uint32_t link_index;
+
+	struct ddc_service *ddc_service;
 };
 
 #define TO_DM_AUX(x) container_of((x), struct amdgpu_dm_dp_aux, aux)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -33,6 +33,8 @@
 #include "dc.h"
 #include "dm_helpers.h"
 
+#include "dc_link_ddc.h"
+
 /* #define TRACE_DPCD */
 
 #ifdef TRACE_DPCD
@@ -77,43 +79,41 @@ void log_dpcd(uint8_t type,
 
 static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 {
-	struct pci_dev *pdev = to_pci_dev(aux->dev);
-	struct drm_device *drm_dev = pci_get_drvdata(pdev);
-	struct amdgpu_device *adev = drm_dev->dev_private;
-	struct dc *dc = adev->dm.dc;
 	enum i2c_mot_mode mot = (msg->request & DP_AUX_I2C_MOT) ? I2C_MOT_TRUE : I2C_MOT_FALSE;
-	bool res;
+	enum ddc_result res;
 
 	switch (msg->request & ~DP_AUX_I2C_MOT) {
 	case DP_AUX_NATIVE_READ:
-		res = dc_read_aux_dpcd(
-				dc,
-				TO_DM_AUX(aux)->link_index,
+		res = dal_ddc_service_read_dpcd_data(
+				TO_DM_AUX(aux)->ddc_service,
+				false,
+				I2C_MOT_UNDEF,
 				msg->address,
 				msg->buffer,
 				msg->size);
 		break;
 	case DP_AUX_NATIVE_WRITE:
-		res = dc_write_aux_dpcd(
-				dc,
-				TO_DM_AUX(aux)->link_index,
+		res = dal_ddc_service_write_dpcd_data(
+				TO_DM_AUX(aux)->ddc_service,
+				false,
+				I2C_MOT_UNDEF,
 				msg->address,
 				msg->buffer,
 				msg->size);
 		break;
 	case DP_AUX_I2C_READ:
-		res = dc_read_aux_i2c(
-				dc,
-				TO_DM_AUX(aux)->link_index,
+		res = dal_ddc_service_read_dpcd_data(
+				TO_DM_AUX(aux)->ddc_service,
+				true,
 				mot,
 				msg->address,
 				msg->buffer,
 				msg->size);
 		break;
 	case DP_AUX_I2C_WRITE:
-		res = dc_write_aux_i2c(
-				dc,
-				TO_DM_AUX(aux)->link_index,
+		res = dal_ddc_service_write_dpcd_data(
+				TO_DM_AUX(aux)->ddc_service,
+				true,
 				mot,
 				msg->address,
 				msg->buffer,
@@ -128,7 +128,7 @@ static ssize_t dm_dp_aux_transfer(struct
 			msg->address,
 			msg->buffer,
 			msg->size,
-			res);
+			r == DDC_RESULT_SUCESSFULL);
 #endif
 
 	return msg->size;
@@ -444,7 +444,7 @@ void amdgpu_dm_initialize_dp_connector(
 	aconnector->dm_dp_aux.aux.name = "dmdc";
 	aconnector->dm_dp_aux.aux.dev = dm->adev->dev;
 	aconnector->dm_dp_aux.aux.transfer = dm_dp_aux_transfer;
-	aconnector->dm_dp_aux.link_index = aconnector->connector_id;
+	aconnector->dm_dp_aux.ddc_service = aconnector->dc_link->ddc;
 
 	drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
 	aconnector->mst_mgr.cbs = &dm_mst_cbs;
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
@@ -50,6 +50,8 @@
 
 #include "modules/inc/mod_freesync.h"
 
+#include "i2caux_interface.h"
+
 struct dm_connector_state {
 	struct drm_connector_state base;
 
@@ -1999,6 +2001,7 @@ int amdgpu_dm_i2c_xfer(struct i2c_adapte
 		      struct i2c_msg *msgs, int num)
 {
 	struct amdgpu_i2c_adapter *i2c = i2c_get_adapdata(i2c_adap);
+	struct ddc_service *ddc_service = i2c->ddc_service;
 	struct i2c_command cmd;
 	int i;
 	int result = -EIO;
@@ -2019,11 +2022,13 @@ int amdgpu_dm_i2c_xfer(struct i2c_adapte
 		cmd.payloads[i].data = msgs[i].buf;
 	}
 
-	if (dc_submit_i2c(i2c->dm->dc, i2c->link_index, &cmd))
+	if (dal_i2caux_submit_i2c_command(
+			ddc_service->ctx->i2caux,
+			ddc_service->ddc_pin,
+			&cmd))
 		result = num;
 
 	kfree(cmd.payloads);
-
 	return result;
 }
 
@@ -2037,19 +2042,22 @@ static const struct i2c_algorithm amdgpu
 	.functionality = amdgpu_dm_i2c_func,
 };
 
-struct amdgpu_i2c_adapter *create_i2c(unsigned int link_index, struct amdgpu_display_manager *dm, int *res)
+static struct amdgpu_i2c_adapter *create_i2c(
+		struct ddc_service *ddc_service,
+		int link_index,
+		int *res)
 {
+	struct amdgpu_device *adev = ddc_service->ctx->driver_context;
 	struct amdgpu_i2c_adapter *i2c;
 
 	i2c = kzalloc(sizeof (struct amdgpu_i2c_adapter), GFP_KERNEL);
-	i2c->dm = dm;
 	i2c->base.owner = THIS_MODULE;
 	i2c->base.class = I2C_CLASS_DDC;
-	i2c->base.dev.parent = &dm->adev->pdev->dev;
+	i2c->base.dev.parent = &adev->pdev->dev;
 	i2c->base.algo = &amdgpu_dm_i2c_algo;
 	snprintf(i2c->base.name, sizeof (i2c->base.name), "AMDGPU DM i2c hw bus %d", link_index);
-	i2c->link_index = link_index;
 	i2c_set_adapdata(&i2c->base, i2c);
+	i2c->ddc_service = ddc_service;
 
 	return i2c;
 }
@@ -2071,7 +2079,7 @@ int amdgpu_dm_connector_init(
 
 	DRM_DEBUG_KMS("%s()\n", __func__);
 
-	i2c = create_i2c(link->link_index, dm, &res);
+	i2c = create_i2c(link->ddc, link->link_index, &res);
 	aconnector->i2c = i2c;
 	res = i2c_add_adapter(&i2c->base);
 
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1525,13 +1525,6 @@ const struct graphics_object_id dc_get_l
 	return core_dc->links[link_index]->link_id;
 }
 
-const struct ddc_service *dc_get_ddc_at_index(
-	struct dc *dc, uint32_t link_index)
-{
-	struct core_dc *core_dc = DC_TO_CORE(dc);
-	return core_dc->links[link_index]->ddc;
-}
-
 enum dc_irq_source dc_get_hpd_irq_source_at_index(
 	struct dc *dc, uint32_t link_index)
 {
@@ -1639,7 +1632,7 @@ bool dc_read_aux_dpcd(
 
 	struct core_link *link = core_dc->links[link_index];
 	enum ddc_result r = dal_ddc_service_read_dpcd_data(
-			link->ddc,
+			link->public.ddc,
 			false,
 			I2C_MOT_UNDEF,
 			address,
@@ -1659,7 +1652,7 @@ bool dc_write_aux_dpcd(
 	struct core_link *link = core_dc->links[link_index];
 
 	enum ddc_result r = dal_ddc_service_write_dpcd_data(
-			link->ddc,
+			link->public.ddc,
 			false,
 			I2C_MOT_UNDEF,
 			address,
@@ -1680,7 +1673,7 @@ bool dc_read_aux_i2c(
 
 		struct core_link *link = core_dc->links[link_index];
 		enum ddc_result r = dal_ddc_service_read_dpcd_data(
-			link->ddc,
+			link->public.ddc,
 			true,
 			mot,
 			address,
@@ -1701,7 +1694,7 @@ bool dc_write_aux_i2c(
 	struct core_link *link = core_dc->links[link_index];
 
 	enum ddc_result r = dal_ddc_service_write_dpcd_data(
-			link->ddc,
+			link->public.ddc,
 			true,
 			mot,
 			address,
@@ -1724,7 +1717,7 @@ bool dc_query_ddc_data(
 	struct core_link *link = core_dc->links[link_index];
 
 	bool result = dal_ddc_service_query_ddc_data(
-			link->ddc,
+			link->public.ddc,
 			address,
 			write_buf,
 			write_size,
@@ -1742,7 +1735,7 @@ bool dc_submit_i2c(
 	struct core_dc *core_dc = DC_TO_CORE(dc);
 
 	struct core_link *link = core_dc->links[link_index];
-	struct ddc_service *ddc = link->ddc;
+	struct ddc_service *ddc = link->public.ddc;
 
 	return dal_i2caux_submit_i2c_command(
 		ddc->ctx->i2caux,
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -66,8 +66,8 @@ static void destruct(struct core_link *l
 {
 	int i;
 
-	if (link->ddc)
-		dal_ddc_service_destroy(&link->ddc);
+	if (link->public.ddc)
+		dal_ddc_service_destroy(&link->public.ddc);
 
 	if(link->link_enc)
 		link->link_enc->funcs->destroy(&link->link_enc);
@@ -320,7 +320,7 @@ static bool is_dp_sink_present(struct co
 		((connector_id == CONNECTOR_ID_DISPLAY_PORT) ||
 		(connector_id == CONNECTOR_ID_EDP));
 
-	ddc = dal_ddc_service_get_ddc_pin(link->ddc);
+	ddc = dal_ddc_service_get_ddc_pin(link->public.ddc);
 
 	if (!ddc) {
 		BREAK_TO_DEBUGGER();
@@ -526,7 +526,7 @@ static void detect_dp(
 		}
 	} else {
 		/* DP passive dongles */
-		sink_caps->signal = dp_passive_dongle_detection(link->ddc,
+		sink_caps->signal = dp_passive_dongle_detection(link->public.ddc,
 				sink_caps,
 				audio_support);
 	}
@@ -629,11 +629,11 @@ bool dc_link_detect(const struct dc_link
 				link->dpcd_sink_count = 1;
 
 		dal_ddc_service_set_transaction_type(
-						link->ddc,
+						link->public.ddc,
 						sink_caps.transaction_type);
 
 		link->public.aux_mode = dal_ddc_service_is_in_aux_transaction_mode(
-				link->ddc);
+				link->public.ddc);
 
 		sink_init_data.link = &link->public;
 		sink_init_data.sink_signal = sink_caps.signal;
@@ -784,7 +784,7 @@ static enum channel_id get_ddc_line(stru
 	struct ddc *ddc;
 	enum channel_id channel = CHANNEL_ID_UNKNOWN;
 
-	ddc = dal_ddc_service_get_ddc_pin(link->ddc);
+	ddc = dal_ddc_service_get_ddc_pin(link->public.ddc);
 
 	if (ddc) {
 		switch (dal_ddc_get_line(ddc)) {
@@ -971,16 +971,16 @@ static bool construct(
 	ddc_service_init_data.ctx = link->ctx;
 	ddc_service_init_data.id = link->link_id;
 	ddc_service_init_data.link = link;
-	link->ddc = dal_ddc_service_create(&ddc_service_init_data);
+	link->public.ddc = dal_ddc_service_create(&ddc_service_init_data);
 
-	if (NULL == link->ddc) {
+	if (link->public.ddc == NULL) {
 		DC_ERROR("Failed to create ddc_service!\n");
 		goto ddc_create_fail;
 	}
 
 	link->public.ddc_hw_inst =
 		dal_ddc_get_line(
-			dal_ddc_service_get_ddc_pin(link->ddc));
+			dal_ddc_service_get_ddc_pin(link->public.ddc));
 
 	enc_init_data.ctx = dc_ctx;
 	bp_funcs->get_src_obj(dc_ctx->dc_bios, link->link_id, 0, &enc_init_data.encoder);
@@ -1049,7 +1049,7 @@ static bool construct(
 device_tag_fail:
 	link->link_enc->funcs->destroy(&link->link_enc);
 link_enc_create_fail:
-	dal_ddc_service_destroy(&link->ddc);
+	dal_ddc_service_destroy(&link->public.ddc);
 ddc_create_fail:
 create_fail:
 
@@ -1256,7 +1256,7 @@ static void enable_link_hdmi(struct pipe
 
 	if (dc_is_hdmi_signal(pipe_ctx->stream->signal))
 		dal_ddc_service_write_scdc_data(
-			stream->sink->link->ddc,
+			stream->sink->link->public.ddc,
 			stream->phy_pix_clk,
 			stream->public.timing.flags.LTE_340MCSC_SCRAMBLE);
 
@@ -1276,7 +1276,7 @@ static void enable_link_hdmi(struct pipe
 			stream->phy_pix_clk);
 
 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_HDMI_TYPE_A)
-		dal_ddc_service_read_scdc_data(link->ddc);
+		dal_ddc_service_read_scdc_data(link->public.ddc);
 }
 
 /****************************enable_link***********************************/
@@ -1474,7 +1474,7 @@ bool dc_link_setup_psr(const struct dc_l
 			&psr_configuration.raw,
 			sizeof(psr_configuration.raw));
 
-		psr_context.channel = link->ddc->ddc_pin->hw_info.ddc_channel;
+		psr_context.channel = link->public.ddc->ddc_pin->hw_info.ddc_channel;
 		psr_context.transmitterId = link->link_enc->transmitter;
 		psr_context.engineId = link->link_enc->preferred_engine;
 
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -1913,7 +1913,7 @@ static void get_active_converter_info(
 	/* decode converter info*/
 	if (!ds_port.fields.PORT_PRESENT) {
 		link->dpcd_caps.dongle_type = DISPLAY_DONGLE_NONE;
-		ddc_service_set_dongle_type(link->ddc,
+		ddc_service_set_dongle_type(link->public.ddc,
 				link->dpcd_caps.dongle_type);
 		return;
 	}
@@ -1983,7 +1983,7 @@ static void get_active_converter_info(
 		}
 	}
 
-	ddc_service_set_dongle_type(link->ddc, link->dpcd_caps.dongle_type);
+	ddc_service_set_dongle_type(link->public.ddc, link->dpcd_caps.dongle_type);
 
 	{
 		struct dp_device_vendor_id dp_id;
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -646,6 +646,8 @@ struct dc_link {
 
 	void *priv;
 	bool aux_mode;
+
+	struct ddc_service *ddc;
 };
 
 struct dpcd_caps {
@@ -829,13 +831,6 @@ void dc_set_power_state(
 		enum dc_acpi_cm_power_state power_state);
 void dc_resume(const struct dc *dc);
 
-/*******************************************************************************
- * DDC Interfaces
- ******************************************************************************/
-
-const struct ddc_service *dc_get_ddc_at_index(
-		struct dc *dc, uint32_t link_index);
-
 /*
  * DPCD access interfaces
  */
--- a/drivers/gpu/drm/amd/display/dc/inc/core_types.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/core_types.h
@@ -151,7 +151,6 @@ struct core_link {
 	struct dc_context *ctx; /* TODO: AUTO remove 'dal' when DC is complete*/
 
 	struct link_encoder *link_enc;
-	struct ddc_service *ddc;
 	struct graphics_object_id link_id;
 	union ddi_channel_mapping ddi_channel_mapping;
 	struct connector_device_tag_info device_tag;