Commit 37d4001a authored by Jouni Högander's avatar Jouni Högander
Browse files

drm/i915/vrr: Add helper for parsing value to be written into TRANS_PUSH 



On Lunarlake and onwards it is possible to generate PSR "frame change"
event using TRANS_PUSH mechanism. As a preparation add new helper to parse
value to be written into TRANS_PUSH register. Setting
LNL_TRANS_PUSH_PSR_PR_EN is done in upcoming change.

Signed-off-by: default avatarJouni Högander <jouni.hogander@intel.com>
Reviewed-by: default avatarAnkit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20260127124120.1069026-4-jouni.hogander@intel.com
parent 28b086fd

drivers/gpu/drm/i915/display/intel_vrr.c

+19 −3
Original line number Diff line number Diff line
@@ -676,6 +676,22 @@ intel_vrr_dcb_reset(const struct intel_crtc_state *old_crtc_state, 
	intel_de_write(display, PIPEDMC_DCB_BALANCE_RESET(pipe), 0);

}



static u32 trans_vrr_push(const struct intel_crtc_state *crtc_state,

			  bool send_push)

{

	struct intel_display *display = to_intel_display(crtc_state);

	u32 trans_vrr_push = 0;



	if (intel_vrr_always_use_vrr_tg(display) ||

	    crtc_state->vrr.enable)

		trans_vrr_push |= TRANS_PUSH_EN;



	if (send_push)

		trans_vrr_push |= TRANS_PUSH_SEND;



	return trans_vrr_push;

}



void intel_vrr_send_push(struct intel_dsb *dsb,

			 const struct intel_crtc_state *crtc_state)

{
@@ -690,8 +706,7 @@ void intel_vrr_send_push(struct intel_dsb *dsb, 


	intel_de_write_dsb(display, dsb,

			   TRANS_PUSH(display, cpu_transcoder),

			   TRANS_PUSH_EN | TRANS_PUSH_SEND);



			   trans_vrr_push(crtc_state, true));

	if (dsb)

		intel_dsb_nonpost_end(dsb);

}
@@ -876,7 +891,8 @@ static void intel_vrr_tg_enable(const struct intel_crtc_state *crtc_state, 
	enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;

	u32 vrr_ctl;



	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder), TRANS_PUSH_EN);

	intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),

		       trans_vrr_push(crtc_state, false));



	vrr_ctl = VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state);