drm/amd/display: Hook up calls to do stereo mux and dig programming to stereo control interface

[Why]
Implementation of stereo mux register is complete, but unused. Need to
call functions to write relevant configs.

[How]
Add function to write stereo config for enable/disable case and call in
stereo control interface.

Signed-off-by: Murton Liu <[e-mail]>
Reviewed-by: Aric Cyr <[e-mail]>
Acked-by: Leo Li <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/core/dc.c

···
 	kref_put(&context->refcount, dc_state_free);
 }
 
+bool dc_set_generic_gpio_for_stereo(bool enable,
+		struct gpio_service *gpio_service)
+{
+	enum gpio_result gpio_result = GPIO_RESULT_NON_SPECIFIC_ERROR;
+	struct gpio_pin_info pin_info;
+	struct gpio *generic;
+	struct gpio_generic_mux_config *config = kzalloc(sizeof(struct gpio_generic_mux_config),
+			   GFP_KERNEL);
+
+	pin_info = dal_gpio_get_generic_pin_info(gpio_service, GPIO_ID_GENERIC, 0);
+
+	if (pin_info.mask == 0xFFFFFFFF || pin_info.offset == 0xFFFFFFFF) {
+		kfree(config);
+		return false;
+	} else {
+		generic = dal_gpio_service_create_generic_mux(
+			gpio_service,
+			pin_info.offset,
+			pin_info.mask);
+	}
+
+	if (!generic) {
+		kfree(config);
+		return false;
+	}
+
+	gpio_result = dal_gpio_open(generic, GPIO_MODE_OUTPUT);
+
+	config->enable_output_from_mux = enable;
+	config->mux_select = GPIO_SIGNAL_SOURCE_PASS_THROUGH_STEREO_SYNC;
+
+	if (gpio_result == GPIO_RESULT_OK)
+		gpio_result = dal_mux_setup_config(generic, config);
+
+	if (gpio_result == GPIO_RESULT_OK) {
+		dal_gpio_close(generic);
+		dal_gpio_destroy_generic_mux(&generic);
+		kfree(config);
+		return true;
+	} else {
+		dal_gpio_close(generic);
+		dal_gpio_destroy_generic_mux(&generic);
+		kfree(config);
+		return false;
+	}
+}
+
 static bool is_surface_in_context(
 		const struct dc_state *context,
 		const struct dc_plane_state *plane_state)

drivers/gpu/drm/amd/display/dc/dc.h

···
 
 void get_clock_requirements_for_state(struct dc_state *state, struct AsicStateEx *info);
 
+bool dc_set_generic_gpio_for_stereo(bool enable,
+		struct gpio_service *gpio_service);
+
 /*
  * fast_validate: we return after determining if we can support the new state,
  * but before we populate the programming info

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

···
 
 	dcn10_config_stereo_parameters(stream, &flags);
 
+	if (stream->timing.timing_3d_format == TIMING_3D_FORMAT_SIDEBAND_FA) {
+		if (!dc_set_generic_gpio_for_stereo(true, dc->ctx->gpio_service))
+			dc_set_generic_gpio_for_stereo(false, dc->ctx->gpio_service);
+	} else {
+		dc_set_generic_gpio_for_stereo(false, dc->ctx->gpio_service);
+	}
+
 	pipe_ctx->stream_res.opp->funcs->opp_program_stereo(
 		pipe_ctx->stream_res.opp,
 		flags.PROGRAM_STEREO == 1 ? true:false,

drivers/gpu/drm/amd/display/dc/gpio/dcn10/hw_factory_dcn10.c

···
 #include "../hw_gpio.h"
 #include "../hw_ddc.h"
 #include "../hw_hpd.h"
+#include "../hw_generic.h"
 
 #include "hw_factory_dcn10.h"
 
···
 		DDC_MASK_SH_LIST(_MASK)
 };
 
+#include "../generic_regs.h"
+
+/* set field name */
+#define SF_GENERIC(reg_name, field_name, post_fix)\
+	.field_name = reg_name ## __ ## field_name ## post_fix
+
+#define generic_regs(id) \
+{\
+	GENERIC_REG_LIST(id)\
+}
+
+static const struct generic_registers generic_regs[] = {
+	generic_regs(A),
+	generic_regs(B),
+};
+
+static const struct generic_sh_mask generic_shift[] = {
+	GENERIC_MASK_SH_LIST(__SHIFT, A),
+	GENERIC_MASK_SH_LIST(__SHIFT, B),
+};
+
+static const struct generic_sh_mask generic_mask[] = {
+	GENERIC_MASK_SH_LIST(_MASK, A),
+	GENERIC_MASK_SH_LIST(_MASK, B),
+};
+
+static void define_generic_registers(struct hw_gpio_pin *pin, uint32_t en)
+{
+	struct hw_generic *generic = HW_GENERIC_FROM_BASE(pin);
+
+	generic->regs = &generic_regs[en];
+	generic->shifts = &generic_shift[en];
+	generic->masks = &generic_mask[en];
+	generic->base.regs = &generic_regs[en].gpio;
+}
+
 static void define_ddc_registers(
 		struct hw_gpio_pin *pin,
 		uint32_t en)
···
 static const struct hw_factory_funcs funcs = {
 	.create_ddc_data = dal_hw_ddc_create,
 	.create_ddc_clock = dal_hw_ddc_create,
-	.create_generic = NULL,
+	.create_generic = dal_hw_generic_create,
 	.create_hpd = dal_hw_hpd_create,
 	.create_sync = NULL,
 	.create_gsl = NULL,
 	.define_hpd_registers = define_hpd_registers,
-	.define_ddc_registers = define_ddc_registers
+	.define_ddc_registers = define_ddc_registers,
+	.define_generic_registers = define_generic_registers
 };
 /*
  * dal_hw_factory_dcn10_init

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

···
 	return dal_gpio_create_irq(service, id, en);
 }
 
+struct gpio *dal_gpio_service_create_generic_mux(
+	struct gpio_service *service,
+	uint32_t offset,
+	uint32_t mask)
+{
+	enum gpio_id id;
+	uint32_t en;
+	struct gpio *generic;
+
+	if (mask == 1)
+		en = GPIO_GENERIC_A;
+	else if (mask == 0x00000100L)
+		en = GPIO_GENERIC_B;
+	else
+		return NULL;
+
+	id = GPIO_ID_GENERIC;
+
+	generic = dal_gpio_create(
+		service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
+
+	return generic;
+}
+
+void dal_gpio_destroy_generic_mux(
+	struct gpio **mux)
+{
+	if (!mux || !*mux) {
+		ASSERT_CRITICAL(false);
+		return;
+	}
+
+	dal_gpio_close(*mux);
+	dal_gpio_destroy(mux);
+	kfree(*mux);
+
+	*mux = NULL;
+}
+
+struct gpio_pin_info dal_gpio_get_generic_pin_info(
+	struct gpio_service *service,
+	enum gpio_id id,
+	uint32_t en)
+{
+	struct gpio_pin_info pin;
+
+	if (service->translate.funcs->id_to_offset) {
+		service->translate.funcs->id_to_offset(id, en, &pin);
+	} else {
+		pin.mask = 0xFFFFFFFF;
+		pin.offset = 0xFFFFFFFF;
+	}
+
+	return pin;
+}
+
 void dal_gpio_service_destroy(
 	struct gpio_service **ptr)
 {
···
 	kfree(*ptr);
 
 	*ptr = NULL;
+}
+
+enum gpio_result dal_mux_setup_config(
+	struct gpio *mux,
+	struct gpio_generic_mux_config *config)
+{
+	struct gpio_config_data config_data;
+
+	if (!config)
+		return GPIO_RESULT_INVALID_DATA;
+
+	config_data.config.generic_mux = *config;
+	config_data.type = GPIO_CONFIG_TYPE_GENERIC_MUX;
+
+	return dal_gpio_set_config(mux, &config_data);
 }
 
 /*
···
 	case GPIO_ID_GENERIC:
 		pin = service->factory.funcs->create_generic(
 			service->ctx, id, en);
+		service->factory.funcs->define_generic_registers(pin, en);
 	break;
 	case GPIO_ID_HPD:
 		pin = service->factory.funcs->create_hpd(

drivers/gpu/drm/amd/display/include/gpio_service_interface.h

···
 	uint32_t offset,
 	uint32_t mask);
 
+struct gpio *dal_gpio_service_create_generic_mux(
+	struct gpio_service *service,
+	uint32_t offset,
+	uint32_t mask);
+
+void dal_gpio_destroy_generic_mux(
+	struct gpio **mux);
+
+enum gpio_result dal_mux_setup_config(
+	struct gpio *mux,
+	struct gpio_generic_mux_config *config);
+
+struct gpio_pin_info dal_gpio_get_generic_pin_info(
+	struct gpio_service *service,
+	enum gpio_id id,
+	uint32_t en);
+
 struct ddc *dal_gpio_create_ddc(
 	struct gpio_service *service,
 	uint32_t offset,
 	uint32_t mask,
 	struct gpio_ddc_hw_info *info);
-
 
 void dal_gpio_destroy_ddc(
 	struct ddc **ddc);