[PATCH 05/27] drm/amd/display: Add function to get PSR state

[harry.wentland@xxxxxxx (Harry Wentland)]

From: Amy Zhang <Amy.Zhang@xxxxxxx>

Change-Id: I7359d5d7b3e6a0569863f6bea10dbf4199be172d
Signed-off-by: Amy Zhang <Amy.Zhang at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 13 +++++++++++++
 drivers/gpu/drm/amd/display/dc/dc.h           |  2 ++
 drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c |  2 ++
 drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h  |  1 +
 4 files changed, 18 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 79f3947a3ee1..318aaa762f31 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -1444,6 +1444,19 @@ bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable)
 	return true;
 }
 
+bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state)
+{
+	struct core_link *link = DC_LINK_TO_CORE(dc_link);
+	struct dc_context *ctx = link->ctx;
+	struct core_dc *core_dc = DC_TO_CORE(ctx->dc);
+	struct dmcu *dmcu = core_dc->res_pool->dmcu;
+
+	if (dmcu != NULL && link->psr_enabled)
+		dmcu->funcs->get_psr_state(dmcu, psr_state);
+
+	return true;
+}
+
 bool dc_link_setup_psr(const struct dc_link *dc_link,
 		const struct dc_stream *stream, struct psr_config *psr_config)
 {
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
index ce052d12a104..328bfcb7dbb8 100644
--- a/drivers/gpu/drm/amd/display/dc/dc.h
+++ b/drivers/gpu/drm/amd/display/dc/dc.h
@@ -702,6 +702,8 @@ bool dc_link_set_abm_disable(const struct dc_link *dc_link);
 
 bool dc_link_set_psr_enable(const struct dc_link *dc_link, bool enable);
 
+bool dc_link_get_psr_state(const struct dc_link *dc_link, uint32_t *psr_state);
+
 bool dc_link_setup_psr(const struct dc_link *dc_link,
 		const struct dc_stream *stream, struct psr_config *psr_config);
 
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
index c58328cd787b..03b51e256e21 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -470,6 +470,7 @@ static const struct dmcu_funcs dce_funcs = {
 	.load_iram = dce_dmcu_load_iram,
 	.set_psr_enable = dce_dmcu_set_psr_enable,
 	.setup_psr = dce_dmcu_setup_psr,
+	.get_psr_state = dce_get_dmcu_psr_state
 };
 
 #if defined(CONFIG_DRM_AMD_DC_DCN1_0)
@@ -477,6 +478,7 @@ static const struct dmcu_funcs dcn10_funcs = {
 	.load_iram = dcn10_dmcu_load_iram,
 	.set_psr_enable = dcn10_dmcu_set_psr_enable,
 	.setup_psr = dcn10_dmcu_setup_psr,
+	.get_psr_state = dcn10_get_dmcu_psr_state
 };
 #endif
 
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
index 656cfdc79891..dff0babb5cf7 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dmcu.h
@@ -41,6 +41,7 @@ struct dmcu_funcs {
 	void (*setup_psr)(struct dmcu *dmcu,
 			struct core_link *link,
 			struct psr_context *psr_context);
+	void (*get_psr_state)(struct dmcu *dmcu, uint32_t *psr_state);
 };
 
 #endif
-- 
2.11.0