drm/amd/display: add shared helpers to update psr config fields to power module

[why]
Currently the amdgpu DM psr configuration parameters are hardcoded
before feeding into the DC helper to setup PSR. We would define a
helper which is to calculate parts of the psr config fields to
avoid hard-coding.

[how]
To make helper shareable, declare and define the helper in the
module_helper, to set/update below fields:
- psr remote buffer setup time
- sdp tx line number deadline
- line time in us
- su_y_granularity
- su_granularity_required
- psr_frame_capture_indication_req
- psr_exit_link_training_required

add another helper to check given the stream context, if there is
only one stream and the output is eDP panel connected.

changes in v2:
------------------
- add detailed comment for how psr setup time is calculated as per
  eDP 1.5 spec

Cc: Chandan Vurdigerenataraj <chandan.vurdigerenataraj@amd.com>

Signed-off-by: David Zhang <dingchen.zhang@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/display/modules/power/power_helpers.h b/drivers/gpu/drm/amd/display/modules/power/power_helpers.h
index 1a634d8c78c5..316452e9dbc9 100644
--- a/drivers/gpu/drm/amd/display/modules/power/power_helpers.h
+++ b/drivers/gpu/drm/amd/display/modules/power/power_helpers.h
@@ -27,6 +27,7 @@
 
 #include "dc/inc/hw/dmcu.h"
 #include "dc/inc/hw/abm.h"
+#include "dc/inc/core_types.h"
 
 struct resource_pool;
 
@@ -53,4 +54,9 @@ bool dmub_init_abm_config(struct resource_pool *res_pool,
 		unsigned int inst);
 
 bool is_psr_su_specific_panel(struct dc_link *link);
+void mod_power_calc_psr_configs(struct psr_config *psr_config,
+		struct dc_link *link,
+		const struct dc_stream_state *stream);
+bool mod_power_only_edp(const struct dc_state *context,
+		const struct dc_stream_state *stream);
 #endif /* MODULES_POWER_POWER_HELPERS_H_ */