drm/amd/display: add AUX and I2C for DCN2

Adding support to program DCN2 AUX and I2C HW.
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -29,6 +29,16 @@
 #include "i2caux_interface.h"
 #include "inc/hw/aux_engine.h"
 
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+#define AUX_COMMON_REG_LIST0(id)\
+	SRI(AUX_CONTROL, DP_AUX, id), \
+	SRI(AUX_ARB_CONTROL, DP_AUX, id), \
+	SRI(AUX_SW_DATA, DP_AUX, id), \
+	SRI(AUX_SW_CONTROL, DP_AUX, id), \
+	SRI(AUX_INTERRUPT_CONTROL, DP_AUX, id), \
+	SRI(AUX_SW_STATUS, DP_AUX, id)
+#endif
+
 #define AUX_COMMON_REG_LIST(id)\
 	SRI(AUX_CONTROL, DP_AUX, id), \
 	SRI(AUX_ARB_CONTROL, DP_AUX, id), \

drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.c

@@ -303,6 +303,10 @@ static bool setup_engine(
 	struct dce_i2c_hw *dce_i2c_hw)
 {
 	uint32_t i2c_setup_limit = I2C_SETUP_TIME_LIMIT_DCE;
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+	uint32_t  reset_length = 0;
+#endif
+
 	/* we have checked I2c not used by DMCU, set SW use I2C REQ to 1 to indicate SW using it*/
 	REG_UPDATE(DC_I2C_ARBITRATION, DC_I2C_SW_USE_I2C_REG_REQ, 1);
 
@@ -323,6 +327,14 @@ static bool setup_engine(
 		REG_UPDATE_N(SETUP, 2,
 			     FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit,
 			     FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1);
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+	} else {
+		reset_length = dce_i2c_hw->send_reset_length;
+		REG_UPDATE_N(SETUP, 3,
+			     FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_TIME_LIMIT), i2c_setup_limit,
+			     FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_SEND_RESET_LENGTH), reset_length,
+			     FN(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_ENABLE), 1);
+#endif
 	}
 	/* Program HW priority
 	 * set to High - interrupt software I2C at any time
@@ -698,3 +710,23 @@ void dcn1_i2c_hw_construct(
 	dce_i2c_hw->setup_limit = I2C_SETUP_TIME_LIMIT_DCN;
 }
 
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+void dcn2_i2c_hw_construct(
+	struct dce_i2c_hw *dce_i2c_hw,
+	struct dc_context *ctx,
+	uint32_t engine_id,
+	const struct dce_i2c_registers *regs,
+	const struct dce_i2c_shift *shifts,
+	const struct dce_i2c_mask *masks)
+{
+	dcn1_i2c_hw_construct(dce_i2c_hw,
+			ctx,
+			engine_id,
+			regs,
+			shifts,
+			masks);
+	dce_i2c_hw->send_reset_length = I2C_SEND_RESET_LENGTH_9;
+	if (ctx->dc->debug.scl_reset_length10)
+		dce_i2c_hw->send_reset_length = I2C_SEND_RESET_LENGTH_10;
+}
+#endif

drivers/gpu/drm/amd/display/dc/dce/dce_i2c_hw.h

@@ -177,6 +177,9 @@ struct dce_i2c_shift {
 	uint8_t DC_I2C_INDEX;
 	uint8_t DC_I2C_INDEX_WRITE;
 	uint8_t XTAL_REF_DIV;
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+	uint8_t DC_I2C_DDC1_SEND_RESET_LENGTH;
+#endif
 	uint8_t DC_I2C_REG_RW_CNTL_STATUS;
 };
 
@@ -217,9 +220,18 @@ struct dce_i2c_mask {
 	uint32_t DC_I2C_INDEX;
 	uint32_t DC_I2C_INDEX_WRITE;
 	uint32_t XTAL_REF_DIV;
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+	uint32_t DC_I2C_DDC1_SEND_RESET_LENGTH;
+#endif
 	uint32_t DC_I2C_REG_RW_CNTL_STATUS;
 };
 
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+#define I2C_COMMON_MASK_SH_LIST_DCN2(mask_sh)\
+	I2C_COMMON_MASK_SH_LIST_DCE110(mask_sh),\
+	I2C_SF(DC_I2C_DDC1_SETUP, DC_I2C_DDC1_SEND_RESET_LENGTH, mask_sh)
+#endif
+
 struct dce_i2c_registers {
 	uint32_t SETUP;
 	uint32_t SPEED;
@@ -300,6 +312,16 @@ void dcn1_i2c_hw_construct(
 	const struct dce_i2c_shift *shifts,
 	const struct dce_i2c_mask *masks);
 
+#if defined(CONFIG_DRM_AMD_DC_DCN2_0)
+void dcn2_i2c_hw_construct(
+	struct dce_i2c_hw *dce_i2c_hw,
+	struct dc_context *ctx,
+	uint32_t engine_id,
+	const struct dce_i2c_registers *regs,
+	const struct dce_i2c_shift *shifts,
+	const struct dce_i2c_mask *masks);
+#endif
+
 bool dce_i2c_submit_command_hw(
 	struct resource_pool *pool,
 	struct ddc *ddc,