[PATCH 09/16] drm/amd/display: Clear optc false state when disable otg

[Alex Hung]

From: Charlene Liu <charlene....@amd.com>

[why]
when disable optc, need to clear the underflow status as well.

Reviewed-by: Chris Park <chris.p...@amd.com>
Acked-by: Alex Hung <alex.h...@amd.com>
Signed-off-by: Charlene Liu <charlene....@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c | 14 +++++++-------
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_optc.c  |  5 ++++-
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c 
b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
index 67c13654ab99..531dd2c65007 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hwseq.c
@@ -343,20 +343,20 @@ void dcn31_enable_power_gating_plane(
        bool enable)
 {
        bool force_on = true; /* disable power gating */
+       uint32_t org_ip_request_cntl = 0;
 
        if (enable && !hws->ctx->dc->debug.disable_hubp_power_gate)
                force_on = false;
 
+       REG_GET(DC_IP_REQUEST_CNTL, IP_REQUEST_EN, &org_ip_request_cntl);
+       if (org_ip_request_cntl == 0)
+               REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 1);
        /* DCHUBP0/1/2/3/4/5 */
        REG_UPDATE(DOMAIN0_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN0_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 1000);
        REG_UPDATE(DOMAIN2_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN2_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 1000);
        /* DPP0/1/2/3/4/5 */
        REG_UPDATE(DOMAIN1_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN1_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 1000);
        REG_UPDATE(DOMAIN3_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN3_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 1000);
 
        force_on = true; /* disable power gating */
        if (enable && !hws->ctx->dc->debug.disable_dsc_power_gate)
@@ -364,11 +364,11 @@ void dcn31_enable_power_gating_plane(
 
        /* DCS0/1/2/3/4/5 */
        REG_UPDATE(DOMAIN16_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN16_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 
1000);
        REG_UPDATE(DOMAIN17_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN17_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 
1000);
        REG_UPDATE(DOMAIN18_PG_CONFIG, DOMAIN_POWER_FORCEON, force_on);
-       REG_WAIT(DOMAIN18_PG_STATUS, DOMAIN_PGFSM_PWR_STATUS, force_on, 1, 
1000);
+
+       if (org_ip_request_cntl == 0)
+               REG_SET(DC_IP_REQUEST_CNTL, 0, IP_REQUEST_EN, 0);
 }
 
 void dcn31_update_info_frame(struct pipe_ctx *pipe_ctx)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_optc.c 
b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_optc.c
index 8afe2130d7c5..e05527a3a8ba 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_optc.c
@@ -124,7 +124,6 @@ static bool optc31_enable_crtc(struct timing_generator 
*optc)
 static bool optc31_disable_crtc(struct timing_generator *optc)
 {
        struct optc *optc1 = DCN10TG_FROM_TG(optc);
-
        /* disable otg request until end of the first line
         * in the vertical blank region
         */
@@ -138,6 +137,7 @@ static bool optc31_disable_crtc(struct timing_generator 
*optc)
        REG_WAIT(OTG_CLOCK_CONTROL,
                        OTG_BUSY, 0,
                        1, 100000);
+       optc1_clear_optc_underflow(optc);
 
        return true;
 }
@@ -158,6 +158,9 @@ static bool optc31_immediate_disable_crtc(struct 
timing_generator *optc)
                        OTG_BUSY, 0,
                        1, 100000);
 
+       /* clear the false state */
+       optc1_clear_optc_underflow(optc);
+
        return true;
 }
 
-- 
2.35.1