From: John Barberiz <jbarberi@amd.com>
Date: Fri, 9 Feb 2018 17:48:18 -0500
Subject: drm/amd/display: Add passive dongle support for HPD Rearch
Git-commit: 11fffe45b76d2849a684f2d769bc76901ba0d301
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Add HPD delay timer support to
1. Single/dual link DVI.
2. DP to HDMI passive dongle
3. DP to DVI passive dongle.
Signed-off-by: John Barberiz <jbarberi@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>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link.c | 7 +++++--
drivers/gpu/drm/amd/display/dc/dc_link.h | 2 +-
2 files changed, 6 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -2358,11 +2358,14 @@ void core_link_set_avmute(struct pipe_ct
core_dc->hwss.set_avmute(pipe_ctx, enable);
}
-void dc_link_disable_hpd_filter(struct dc_link *link)
+void dc_link_enable_hpd_filter(struct dc_link *link, bool enable)
{
struct gpio *hpd;
- if (!link->is_hpd_filter_disabled) {
+ if (enable) {
+ link->is_hpd_filter_disabled = false;
+ program_hpd_filter(link);
+ } else {
link->is_hpd_filter_disabled = true;
/* Obtain HPD handle */
hpd = get_hpd_gpio(link->ctx->dc_bios, link->link_id, link->ctx->gpio_service);
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -197,7 +197,7 @@ bool dc_link_dp_set_test_pattern(
const unsigned char *p_custom_pattern,
unsigned int cust_pattern_size);
-void dc_link_disable_hpd_filter(struct dc_link *link);
+void dc_link_enable_hpd_filter(struct dc_link *link, bool enable);
/*
* DPCD access interfaces