drm/amd/display: Enable double buffer as per vertical interrupt enabled.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
index 7cd10cb..8dbc82f 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c
@@ -299,6 +299,17 @@ static void tgn10_program_timing(
 static void tgn10_unblank_crtc(struct timing_generator *tg)
 {
        struct dcn10_timing_generator *tgn10 = DCN10TG_FROM_TG(tg);
+       uint32_t vertical_interrupt_enable = 0;
+
+       REG_GET(OTG_VERTICAL_INTERRUPT2_CONTROL,
+                       OTG_VERTICAL_INTERRUPT2_INT_ENABLE, &vertical_interrupt_enable);
+
+       /* temporary work around for vertical interrupt, once vertical interrupt enabled,
+        * this check will be removed.
+        */
+       if (vertical_interrupt_enable)
+               REG_UPDATE(OTG_DOUBLE_BUFFER_CONTROL,
+                               OTG_BLANK_DATA_DOUBLE_BUFFER_EN, 1);
 
        REG_UPDATE_2(OTG_BLANK_CONTROL,
                        OTG_BLANK_DATA_EN, 0,

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.h
index 0826d73..7d4818d 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.h
@@ -65,6 +65,7 @@
        SRI(OTG_NOM_VERT_POSITION, OTG, inst),\
        SRI(OTG_BLACK_COLOR, OTG, inst),\
        SRI(OTG_CLOCK_CONTROL, OTG, inst),\
+       SRI(OTG_VERTICAL_INTERRUPT2_CONTROL, OTG, inst),\
        SRI(OTG_VERTICAL_INTERRUPT2_POSITION, OTG, inst),\
        SRI(OPTC_INPUT_CLOCK_CONTROL, ODM, inst),\
        SRI(OPTC_DATA_SOURCE_SELECT, ODM, inst),\
@@ -117,6 +118,7 @@ struct dcn_tg_registers {
        uint32_t OTG_TEST_PATTERN_CONTROL;
        uint32_t OTG_TEST_PATTERN_COLOR;
        uint32_t OTG_CLOCK_CONTROL;
+       uint32_t OTG_VERTICAL_INTERRUPT2_CONTROL;
        uint32_t OTG_VERTICAL_INTERRUPT2_POSITION;
        uint32_t OPTC_INPUT_CLOCK_CONTROL;
        uint32_t OPTC_DATA_SOURCE_SELECT;
@@ -196,6 +198,7 @@ struct dcn_tg_registers {
        SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_EN, mask_sh),\
        SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_ON, mask_sh),\
        SF(OTG0_OTG_CLOCK_CONTROL, OTG_CLOCK_GATE_DIS, mask_sh),\
+       SF(OTG0_OTG_VERTICAL_INTERRUPT2_CONTROL, OTG_VERTICAL_INTERRUPT2_INT_ENABLE, mask_sh),\
        SF(OTG0_OTG_VERTICAL_INTERRUPT2_POSITION, OTG_VERTICAL_INTERRUPT2_LINE_START, mask_sh),\
        SF(ODM0_OPTC_INPUT_CLOCK_CONTROL, OPTC_INPUT_CLK_EN, mask_sh),\
        SF(ODM0_OPTC_INPUT_CLOCK_CONTROL, OPTC_INPUT_CLK_ON, mask_sh),\
@@ -302,6 +305,7 @@ struct dcn_tg_registers {
        type OTG_CLOCK_EN;\
        type OTG_CLOCK_ON;\
        type OTG_CLOCK_GATE_DIS;\
+       type OTG_VERTICAL_INTERRUPT2_INT_ENABLE;\
        type OTG_VERTICAL_INTERRUPT2_LINE_START;\
        type OPTC_INPUT_CLK_EN;\
        type OPTC_INPUT_CLK_ON;\