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

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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: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20260127124120.1069026-4-jouni.hogander@intel.com
This commit is contained in:
Jouni Högander 2026-01-27 14:41:12 +02:00
parent 28b086fd19
commit 37d4001a72
1 changed files with 19 additions and 3 deletions
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22
drivers/gpu/drm/i915/display/intel_vrr.c
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@ -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);