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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>
This commit is contained in:
John Barberiz 2018-01-26 17:39:19 -05:00 committed by Alex Deucher
parent ed024578e7
commit 9a6995ce9b
2 changed files with 36 additions and 0 deletions
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32
drivers/gpu/drm/amd/display/dc/core/dc_link.c
View File

@ -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);
}
}

4
drivers/gpu/drm/amd/display/dc/dc_link.h
View File

@ -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
*/