From: Chris Park <chris.p...@amd.com>
[Why]
Read Request provides alterative method to polling to
the HDMI sinks that support it.
[How]
Implement Read Request where interrupt can be generated
by the sink.
Reviewed-by: Joshua Aberback <joshua.aberb...@amd.com>
Signed-off-by: Chris Park <chris.p...@amd.com>
Signed-off-by: Zaeem Mohamed <zaeem.moha...@amd.com>
---
drivers/gpu/drm/amd/display/dc/dc.h | 1 +
drivers/gpu/drm/amd/display/dc/dc_types.h | 1 +
drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c | 14 ++++++++++++++
drivers/gpu/drm/amd/display/dc/irq_types.h | 7 +++++++
drivers/gpu/drm/amd/display/dc/link/link_factory.c | 4 ++++
.../amd/display/include/gpio_service_interface.h | 3 +++
6 files changed, 30 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h
b/drivers/gpu/drm/amd/display/dc/dc.h
index 7624b909497e..04b1c7b331a6 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -1436,6 +1436,7 @@ struct dc_scratch_space {
enum signal_type connector_signal;
enum dc_irq_source irq_source_hpd;
enum dc_irq_source irq_source_hpd_rx;/* aka DP Short Pulse */
+ enum dc_irq_source irq_source_read_request;/* Read Request */
bool is_hpd_filter_disabled;
bool dp_ss_off;
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h
b/drivers/gpu/drm/amd/display/dc/dc_types.h
index 9bfa9ac1b05f..ab1adc836018 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -210,6 +210,7 @@ struct dc_edid_caps {
bool edid_hdmi;
bool hdr_supported;
+ bool rr_capable;
struct dc_panel_patch panel_patch;
};
diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
index b099989d9364..942d9f0b6df2 100644
--- a/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
+++ b/drivers/gpu/drm/amd/display/dc/gpio/gpio_service.c
@@ -411,6 +411,20 @@ enum dc_irq_source dal_irq_get_rx_source(
}
}
+enum dc_irq_source dal_irq_get_read_request(
+ const struct gpio *irq)
+{
+ enum gpio_id id = dal_gpio_get_id(irq);
+
+ switch (id) {
+ case GPIO_ID_HPD:
+ return (enum dc_irq_source)(DC_IRQ_SOURCE_DCI2C_RR_DDC1 +
+ dal_gpio_get_enum(irq));
+ default:
+ return DC_IRQ_SOURCE_INVALID;
+ }
+}
+
enum gpio_result dal_irq_setup_hpd_filter(
struct gpio *irq,
struct gpio_hpd_config *config)
diff --git a/drivers/gpu/drm/amd/display/dc/irq_types.h
b/drivers/gpu/drm/amd/display/dc/irq_types.h
index eadab0a2afeb..a2f7b933bebf 100644
--- a/drivers/gpu/drm/amd/display/dc/irq_types.h
+++ b/drivers/gpu/drm/amd/display/dc/irq_types.h
@@ -168,6 +168,13 @@ enum dc_irq_source {
DC_IRQ_SOURCE_DC5_VLINE2,
DC_IRQ_SOURCE_DC6_VLINE2,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC1,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC2,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC3,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC4,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC5,
+ DC_IRQ_SOURCE_DCI2C_RR_DDC6,
+
DAL_IRQ_SOURCES_NUMBER
};
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_factory.c
b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
index 70f54bdbbc64..0125f2cfc114 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_factory.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
@@ -464,6 +464,7 @@ static bool construct_phy(struct dc_link *link,
link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
link->irq_source_hpd_rx = DC_IRQ_SOURCE_INVALID;
+ link->irq_source_read_request = DC_IRQ_SOURCE_INVALID;
link->link_status.dpcd_caps = &link->dpcd_caps;
link->dc = init_params->dc;
@@ -514,6 +515,9 @@ static bool construct_phy(struct dc_link *link,
case CONNECTOR_ID_HDMI_TYPE_A:
link->connector_signal = SIGNAL_TYPE_HDMI_TYPE_A;
+ if (link->hpd_gpio)
+ link->irq_source_read_request =
+
dal_irq_get_read_request(link->hpd_gpio);
break;
case CONNECTOR_ID_SINGLE_LINK_DVID:
case CONNECTOR_ID_SINGLE_LINK_DVII:
diff --git a/drivers/gpu/drm/amd/display/include/gpio_service_interface.h
b/drivers/gpu/drm/amd/display/include/gpio_service_interface.h
index 7e3240e73c1f..63813009a3a6 100644
--- a/drivers/gpu/drm/amd/display/include/gpio_service_interface.h
+++ b/drivers/gpu/drm/amd/display/include/gpio_service_interface.h
@@ -86,6 +86,9 @@ enum dc_irq_source dal_irq_get_source(
enum dc_irq_source dal_irq_get_rx_source(
const struct gpio *irq);
+enum dc_irq_source dal_irq_get_read_request(
+ const struct gpio *irq);
+
enum gpio_result dal_irq_setup_hpd_filter(
struct gpio *irq,
struct gpio_hpd_config *config);
--
2.34.1
