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drm/amd/display: Make GPIO HPD path conditional

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[Why]
Avoid unnecessary GPIO configuration attempts on dcn that doesn't
support it.

[How]
Conditionally use GPIO HPD detection or rely on hw encoder path.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Roman Li 2026-01-23 17:00:06 -05:00 committed by Alex Deucher
parent 318917e1d8
commit 4bff89bad9
2 changed files with 12 additions and 5 deletions
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8
drivers/gpu/drm/amd/display/dc/link/link_factory.c
View File

@ -564,9 +564,11 @@ static bool construct_phy(struct dc_link *link,
enc_init_data.analog_engine = find_analog_engine(link, &enc_init_data.analog_encoder);
enc_init_data.encoder = link_encoder;
enc_init_data.analog_engine = link_analog_engine;
enc_init_data.hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
link->ctx->gpio_service);
if (link->ctx->dce_version <= DCN_VERSION_4_01)
enc_init_data.hpd_gpio = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
link->ctx->gpio_service);
else
enc_init_data.hpd_gpio = NULL;
if (enc_init_data.hpd_gpio) {
dal_gpio_open(enc_init_data.hpd_gpio, GPIO_MODE_INTERRUPT);
dal_gpio_unlock_pin(enc_init_data.hpd_gpio);

9
drivers/gpu/drm/amd/display/dc/link/protocols/link_hpd.c
View File

@ -136,8 +136,13 @@ enum hpd_source_id get_hpd_line(struct dc_link *link)
hpd_id = HPD_SOURCEID_UNKNOWN;
hpd = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
link->ctx->gpio_service);
/* Use GPIO path where supported, otherwise use hardware encoder path */
if (link->ctx && link->ctx->dce_version <= DCN_VERSION_4_01) {
hpd = link_get_hpd_gpio(link->ctx->dc_bios, link->link_id,
link->ctx->gpio_service);
} else {
hpd = NULL;
}
if (hpd) {
switch (dal_irq_get_source(hpd)) {