From 9fe00af4433fd8b25fd02ea93320eeb549bccc25 Mon Sep 17 00:00:00 2001 From: hersen wu Date: Wed, 13 Mar 2019 16:19:17 -0400 Subject: [PATCH 2470/2940] drm/amd/display: do not need otg lock if otg is not active [todo] need find caller bug. tempooariy fix Signed-off-by: hersen wu Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c index c5b2ddb95449..ff2f6e0f439e 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c @@ -592,6 +592,13 @@ uint32_t optc1_get_vblank_counter(struct timing_generator *optc) void optc1_lock(struct timing_generator *optc) { struct optc *optc1 = DCN10TG_FROM_TG(optc); + uint32_t regval = 0; + + regval = REG_READ(OTG_CONTROL); + + /* otg is not running, do not need to be locked */ + if ((regval & 0x1) == 0x0) + return; REG_SET(OTG_GLOBAL_CONTROL0, 0, OTG_MASTER_UPDATE_LOCK_SEL, optc->inst); @@ -599,10 +606,12 @@ void optc1_lock(struct timing_generator *optc) OTG_MASTER_UPDATE_LOCK, 1); /* Should be fast, status does not update on maximus */ - if (optc->ctx->dce_environment != DCE_ENV_FPGA_MAXIMUS) + if (optc->ctx->dce_environment != DCE_ENV_FPGA_MAXIMUS) { + REG_WAIT(OTG_MASTER_UPDATE_LOCK, UPDATE_LOCK_STATUS, 1, 1, 10); + } } void optc1_unlock(struct timing_generator *optc) -- 2.17.1