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From 94ea734c4be6960a5e2b01b1d0d41d439b204f5e Mon Sep 17 00:00:00 2001
From: John Barberiz <jbarberi@amd.com>
Date: Fri, 26 Jan 2018 17:39:19 -0500
Subject: [PATCH 3544/4131] drm/amd/display: Rearchitecture HDMI HPD
- Disabled HPD filter and used HPD software timer instead
- Allows DM to disable HPD filtering
Signed-off-by: John Barberiz <jbarberi@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@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/core/dc_link.c | 32 +++++++++++++++++++++++++++
drivers/gpu/drm/amd/display/dc/dc_link.h | 4 ++++
2 files changed, 36 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 50aa9a4..02e1c3b 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -127,6 +127,8 @@ static bool program_hpd_filter(
int delay_on_connect_in_ms = 0;
int delay_on_disconnect_in_ms = 0;
+ if (link->is_hpd_filter_disabled)
+ return false;
/* Verify feature is supported */
switch (link->connector_signal) {
case SIGNAL_TYPE_DVI_SINGLE_LINK:
@@ -2346,3 +2348,33 @@ void core_link_set_avmute(struct pipe_ctx *pipe_ctx, bool enable)
core_dc->hwss.set_avmute(pipe_ctx, enable);
}
+void dc_link_disable_hpd_filter(struct dc_link *link)
+{
+ struct gpio *hpd;
+
+ if (!link->is_hpd_filter_disabled) {
+ link->is_hpd_filter_disabled = true;
+ /* Obtain HPD handle */
+ hpd = get_hpd_gpio(link->ctx->dc_bios, link->link_id, link->ctx->gpio_service);
+
+ if (!hpd)
+ return;
+
+ /* Setup HPD filtering */
+ if (dal_gpio_open(hpd, GPIO_MODE_INTERRUPT) == GPIO_RESULT_OK) {
+ struct gpio_hpd_config config;
+
+ config.delay_on_connect = 0;
+ config.delay_on_disconnect = 0;
+
+ dal_irq_setup_hpd_filter(hpd, &config);
+
+ dal_gpio_close(hpd);
+ } else {
+ ASSERT_CRITICAL(false);
+ }
+ /* Release HPD handle */
+ dal_gpio_destroy_irq(&hpd);
+ }
+}
+
diff --git a/drivers/gpu/drm/amd/display/dc/dc_link.h b/drivers/gpu/drm/amd/display/dc/dc_link.h
index f11a734..ac0f617 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_link.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_link.h
@@ -64,6 +64,8 @@ struct dc_link {
enum signal_type connector_signal;
enum dc_irq_source irq_source_hpd;
enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
+ bool is_hpd_filter_disabled;
+
/* caps is the same as reported_link_cap. link_traing use
* reported_link_cap. Will clean up. TODO
*/
@@ -195,6 +197,8 @@ 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);
+
/*
* DPCD access interfaces
*/
--
2.7.4
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