drm/amd/display: use CRTC_VERTICAL_INTERRUPT0 as VBLANK trigger.

VBLANK interrupt is driven bu line buffer vcounter which is
ahead of CRTC vcounter. Use an interrupt that fires at the actual
CRTC vblank start boundry.
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dce110/dce110_timing_generator.c

@@ -1869,6 +1869,48 @@ void dce110_tg_set_colors(struct timing_generator *tg,
 		dce110_tg_set_overscan_color(tg, overscan_color);
 }
 
+/* Gets first line of blank region of the display timing for CRTC
+ * and programms is as a trigger to fire vertical interrupt
+ */
+bool dce110_arm_vert_intr(struct timing_generator *tg, uint8_t width)
+{
+	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
+	uint32_t vbl = 0;
+	uint32_t val = 0;
+	uint32_t position, vbl_start;
+
+	tg->funcs->get_scanoutpos(
+			tg,
+			&vbl,
+			&position);
+
+	if (vbl == 0)
+		return false;
+
+	vbl_start =
+		get_reg_field_value(
+		vbl,
+		CRTC_V_BLANK_START_END,
+		CRTC_V_BLANK_START);
+
+	set_reg_field_value(
+		val,
+		vbl_start,
+		CRTC_VERTICAL_INTERRUPT0_POSITION,
+		CRTC_VERTICAL_INTERRUPT0_LINE_START);
+
+	/* Set interaval width for interrupt to fire to 1 scanline */
+	set_reg_field_value(
+		val,
+		vbl_start + width,
+		CRTC_VERTICAL_INTERRUPT0_POSITION,
+		CRTC_VERTICAL_INTERRUPT0_LINE_END);
+
+	dm_write_reg(tg->ctx, CRTC_REG(mmCRTC_VERTICAL_INTERRUPT0_POSITION), val);
+
+	return true;
+}
+
 static const struct timing_generator_funcs dce110_tg_funcs = {
 		.validate_timing = dce110_tg_validate_timing,
 		.program_timing = dce110_tg_program_timing,
@@ -1901,8 +1943,8 @@ static const struct timing_generator_funcs dce110_tg_funcs = {
 				dce110_timing_generator_set_drr,
 		.set_static_screen_control =
 			dce110_timing_generator_set_static_screen_control,
-		.set_test_pattern = dce110_timing_generator_set_test_pattern
-
+		.set_test_pattern = dce110_timing_generator_set_test_pattern,
+		.arm_vert_intr = dce110_arm_vert_intr,
 };
 
 bool dce110_timing_generator_construct(

drivers/gpu/drm/amd/display/dc/dce110/dce110_timing_generator.h

@@ -271,4 +271,7 @@ void dce110_tg_set_colors(struct timing_generator *tg,
 	const struct tg_color *blank_color,
 	const struct tg_color *overscan_color);
 
+bool dce110_arm_vert_intr(
+		struct timing_generator *tg, uint8_t width);
+
 #endif /* __DC_TIMING_GENERATOR_DCE110_H__ */

drivers/gpu/drm/amd/display/dc/dce120/dce120_timing_generator.c

@@ -1039,6 +1039,35 @@ void dce120_timing_generator_set_test_pattern(
 	}
 }
 
+static bool dce120_arm_vert_intr(
+		struct timing_generator *tg,
+		uint8_t width)
+{
+	struct dce110_timing_generator *tg110 = DCE110TG_FROM_TG(tg);
+	uint32_t vbl, position, vbl_start;
+
+	tg->funcs->get_scanoutpos(
+				tg,
+				&vbl,
+				&position);
+
+	if (vbl == 0)
+		return false;
+
+	vbl_start =
+		get_reg_field_value(
+		vbl,
+		CRTC0_CRTC_V_BLANK_START_END,
+		CRTC_V_BLANK_START);
+
+	CRTC_REG_SET_2(
+			CRTC0_CRTC_VERTICAL_INTERRUPT0_POSITION,
+			CRTC_VERTICAL_INTERRUPT0_LINE_START, vbl_start,
+			CRTC_VERTICAL_INTERRUPT0_LINE_END, vbl_start + width);
+
+	return true;
+}
+
 static struct timing_generator_funcs dce120_tg_funcs = {
 		.validate_timing = dce120_tg_validate_timing,
 		.program_timing = dce120_tg_program_timing,
@@ -1068,7 +1097,8 @@ static struct timing_generator_funcs dce120_tg_funcs = {
 		.enable_advanced_request = dce120_timing_generator_enable_advanced_request,
 		.set_drr = dce120_timing_generator_set_drr,
 		.set_static_screen_control = dce120_timing_generator_set_static_screen_control,
-		.set_test_pattern = dce120_timing_generator_set_test_pattern
+		.set_test_pattern = dce120_timing_generator_set_test_pattern,
+		.arm_vert_intr = dce120_arm_vert_intr,
 };
 
 

drivers/gpu/drm/amd/display/dc/dce80/dce80_timing_generator.c

@@ -145,6 +145,7 @@ static const struct timing_generator_funcs dce80_tg_funcs = {
 		.set_static_screen_control =
 			dce110_timing_generator_set_static_screen_control,
 		.set_test_pattern = dce110_timing_generator_set_test_pattern,
+		.arm_vert_intr = dce110_arm_vert_intr,
 
 		/* DCE8.0 overrides */
 		.enable_advanced_request =

drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h

@@ -156,6 +156,8 @@ struct timing_generator_funcs {
 		enum controller_dp_test_pattern test_pattern,
 		enum dc_color_depth color_depth);
 
+	bool (*arm_vert_intr)(struct timing_generator *tg, uint8_t width);
+
 };
 
 #endif

drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.c

@@ -31,14 +31,10 @@
 
 #include "dce/dce_11_0_d.h"
 #include "dce/dce_11_0_sh_mask.h"
+
 #include "ivsrcid/ivsrcid_vislands30.h"
 
-#define VISLANDS30_IV_SRCID_D1_VBLANK                        1
-#define VISLANDS30_IV_SRCID_D2_VBLANK                        2
-#define VISLANDS30_IV_SRCID_D3_VBLANK                        3
-#define VISLANDS30_IV_SRCID_D4_VBLANK                        4
-#define VISLANDS30_IV_SRCID_D5_VBLANK                        5
-#define VISLANDS30_IV_SRCID_D6_VBLANK                        6
+#include "core_dc.h"
 
 static bool hpd_ack(
 	struct irq_service *irq_service,
@@ -83,7 +79,7 @@ static const struct irq_source_info_funcs pflip_irq_info_funcs = {
 };
 
 static const struct irq_source_info_funcs vblank_irq_info_funcs = {
-	.set = NULL,
+	.set = dce110_vblank_set,
 	.ack = NULL
 };
 
@@ -148,18 +144,19 @@ static const struct irq_source_info_funcs vblank_irq_info_funcs = {
 
 #define vblank_int_entry(reg_num)\
 	[DC_IRQ_SOURCE_VBLANK1 + reg_num] = {\
-		.enable_reg = mmLB ## reg_num ## _LB_INTERRUPT_MASK,\
+		.enable_reg = mmCRTC ## reg_num ## _CRTC_VERTICAL_INTERRUPT0_CONTROL,\
 		.enable_mask =\
-			LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK,\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK,\
 		.enable_value = {\
-			LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK,\
-			~LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK},\
-		.ack_reg = mmLB ## reg_num ## _LB_VBLANK_STATUS,\
+			CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK,\
+			~CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK},\
+		.ack_reg = mmCRTC ## reg_num ## _CRTC_VERTICAL_INTERRUPT0_CONTROL,\
 		.ack_mask =\
-		LB_VBLANK_STATUS__VBLANK_ACK_MASK,\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_CLEAR_MASK,\
 		.ack_value =\
-		LB_VBLANK_STATUS__VBLANK_ACK_MASK,\
-		.funcs = &vblank_irq_info_funcs\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_CLEAR_MASK,\
+		.funcs = &vblank_irq_info_funcs,\
+		.src_id = VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0 + reg_num\
 	}
 
 #define dummy_irq_entry() \
@@ -202,6 +199,35 @@ bool dal_irq_service_dummy_ack(
 	return false;
 }
 
+
+bool dce110_vblank_set(
+		struct irq_service *irq_service,
+		const struct irq_source_info *info,
+		bool enable)
+{
+	struct dc_context *dc_ctx = irq_service->ctx;
+	struct core_dc *core_dc = DC_TO_CORE(irq_service->ctx->dc);
+	enum dc_irq_source dal_irq_src = dc_interrupt_to_irq_source(
+										irq_service->ctx->dc,
+										info->src_id,
+										info->ext_id);
+	uint8_t pipe_offset = dal_irq_src - IRQ_TYPE_VBLANK;
+
+	struct timing_generator *tg =
+			core_dc->current_context->res_ctx.pipe_ctx[pipe_offset].tg;
+
+	if (enable) {
+		if (!tg->funcs->arm_vert_intr(tg, 2)) {
+			DC_ERROR("Failed to get VBLANK!\n");
+			return false;
+		}
+	}
+
+	dal_irq_service_set_generic(irq_service, info, enable);
+	return true;
+
+}
+
 static const struct irq_source_info_funcs dummy_irq_info_funcs = {
 	.set = dal_irq_service_dummy_set,
 	.ack = dal_irq_service_dummy_ack
@@ -302,17 +328,17 @@ enum dc_irq_source to_dal_irq_source_dce110(
 		uint32_t ext_id)
 {
 	switch (src_id) {
-	case VISLANDS30_IV_SRCID_D1_VBLANK:
+	case VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK1;
-	case VISLANDS30_IV_SRCID_D2_VBLANK:
+	case VISLANDS30_IV_SRCID_D2_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK2;
-	case VISLANDS30_IV_SRCID_D3_VBLANK:
+	case VISLANDS30_IV_SRCID_D3_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK3;
-	case VISLANDS30_IV_SRCID_D4_VBLANK:
+	case VISLANDS30_IV_SRCID_D4_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK4;
-	case VISLANDS30_IV_SRCID_D5_VBLANK:
+	case VISLANDS30_IV_SRCID_D5_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK5;
-	case VISLANDS30_IV_SRCID_D6_VBLANK:
+	case VISLANDS30_IV_SRCID_D6_VERTICAL_INTERRUPT0:
 		return DC_IRQ_SOURCE_VBLANK6;
 	case VISLANDS30_IV_SRCID_D1_V_UPDATE_INT:
 		return DC_IRQ_SOURCE_VUPDATE1;

drivers/gpu/drm/amd/display/dc/irq/dce110/irq_service_dce110.h

@@ -45,4 +45,9 @@ bool dal_irq_service_dummy_ack(
 	struct irq_service *irq_service,
 	const struct irq_source_info *info);
 
+bool dce110_vblank_set(
+	struct irq_service *irq_service,
+	const struct irq_source_info *info,
+	bool enable);
+
 #endif

drivers/gpu/drm/amd/display/dc/irq/dce120/irq_service_dce120.c

@@ -79,7 +79,7 @@ static const struct irq_source_info_funcs pflip_irq_info_funcs = {
 };
 
 static const struct irq_source_info_funcs vblank_irq_info_funcs = {
-	.set = NULL,
+	.set = dce110_vblank_set,
 	.ack = NULL
 };
 
@@ -144,10 +144,11 @@ static const struct irq_source_info_funcs vblank_irq_info_funcs = {
 
 #define vblank_int_entry(reg_num)\
 	[DC_IRQ_SOURCE_VBLANK1 + reg_num] = {\
-		IRQ_REG_ENTRY(LB, reg_num,\
-			LB_INTERRUPT_MASK, VBLANK_INTERRUPT_MASK,\
-			LB_VBLANK_STATUS, VBLANK_ACK),\
-		.funcs = &vblank_irq_info_funcs\
+		IRQ_REG_ENTRY(CRTC, reg_num,\
+				CRTC_VERTICAL_INTERRUPT0_CONTROL, CRTC_VERTICAL_INTERRUPT0_INT_ENABLE,\
+				CRTC_VERTICAL_INTERRUPT0_CONTROL, CRTC_VERTICAL_INTERRUPT0_CLEAR),\
+		.funcs = &vblank_irq_info_funcs,\
+		.src_id = VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0 + reg_num\
 	}
 
 #define dummy_irq_entry() \

drivers/gpu/drm/amd/display/dc/irq/dce80/irq_service_dce80.c

@@ -35,6 +35,9 @@
 
 #include "ivsrcid/ivsrcid_vislands30.h"
 
+#include "dc_types.h"
+#include "inc/core_dc.h"
+
 static bool hpd_ack(
 	struct irq_service *irq_service,
 	const struct irq_source_info *info)
@@ -78,7 +81,7 @@ static const struct irq_source_info_funcs pflip_irq_info_funcs = {
 };
 
 static const struct irq_source_info_funcs vblank_irq_info_funcs = {
-	.set = NULL,
+	.set = dce110_vblank_set,
 	.ack = NULL
 };
 
@@ -145,18 +148,19 @@ static const struct irq_source_info_funcs vblank_irq_info_funcs = {
 
 #define vblank_int_entry(reg_num)\
 	[DC_IRQ_SOURCE_VBLANK1 + reg_num] = {\
-		.enable_reg = mmLB ## reg_num ## _LB_INTERRUPT_MASK,\
+		.enable_reg = mmCRTC ## reg_num ## _CRTC_VERTICAL_INTERRUPT0_CONTROL,\
 		.enable_mask =\
-			LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK,\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK,\
 		.enable_value = {\
-			LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK,\
-			~LB_INTERRUPT_MASK__VBLANK_INTERRUPT_MASK_MASK},\
-		.ack_reg = mmLB ## reg_num ## _LB_VBLANK_STATUS,\
+			CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK,\
+			~CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_INT_ENABLE_MASK},\
+		.ack_reg = mmCRTC ## reg_num ## _CRTC_VERTICAL_INTERRUPT0_CONTROL,\
 		.ack_mask =\
-		LB_VBLANK_STATUS__VBLANK_ACK_MASK,\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_CLEAR_MASK,\
 		.ack_value =\
-		LB_VBLANK_STATUS__VBLANK_ACK_MASK,\
-		.funcs = &vblank_irq_info_funcs\
+		CRTC_VERTICAL_INTERRUPT0_CONTROL__CRTC_VERTICAL_INTERRUPT0_CLEAR_MASK,\
+		.funcs = &vblank_irq_info_funcs,\
+		.src_id = VISLANDS30_IV_SRCID_D1_VERTICAL_INTERRUPT0 + reg_num\
 	}
 
 #define dummy_irq_entry() \