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From aaefbca5879edfe949431ab174d2fc4b0bb6a6a5 Mon Sep 17 00:00:00 2001
From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Date: Thu, 2 Nov 2017 14:55:14 -0400
Subject: [PATCH 2724/4131] drm/amd/display: add warning on long reg_wait
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@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>
---
drivers/gpu/drm/amd/display/dc/dc_helper.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_helper.c b/drivers/gpu/drm/amd/display/dc/dc_helper.c
index 0d84b2a..c584252 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_helper.c
+++ b/drivers/gpu/drm/amd/display/dc/dc_helper.c
@@ -156,8 +156,13 @@ uint32_t generic_reg_wait(const struct dc_context *ctx,
field_value = get_reg_field_value_ex(reg_val, mask, shift);
- if (field_value == condition_value)
+ if (field_value == condition_value) {
+ if (i * delay_between_poll_us > 1000)
+ dm_output_to_console("REG_WAIT taking a while: %dms in %s line:%d\n",
+ delay_between_poll_us * i / 1000,
+ func_name, line);
return reg_val;
+ }
}
dm_error("REG_WAIT timeout %dus * %d tries - %s line:%d\n",
--
2.7.4
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