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drm/i915/vrr: Add function to reset DC balance accumulated params

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Add function which resets all accumulated DC Balance parameters
whenever adaptive mode of VRR goes off. This helps to give a
fresh start when VRR is re-enabled.

--v2:
- Typo, change crtc_state to old_crtc_state. (Ankit)

Signed-off-by: Mitul Golani <mitulkumar.ajitkumar.golani@intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Link: https://patch.msgid.link/20251223104542.2688548-10-mitulkumar.ajitkumar.golani@intel.com
This commit is contained in:
Mitul Golani 2025-12-23 16:15:31 +05:30 committed by Ankit Nautiyal
parent 7bf11bc2f7
commit 80d1498359
3 changed files with 17 additions and 0 deletions
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1
drivers/gpu/drm/i915/display/intel_display.c
View File

@ -1158,6 +1158,7 @@ static void intel_pre_plane_update(struct intel_atomic_state *state,
if (intel_crtc_vrr_disabling(state, crtc)) {
intel_vrr_disable(old_crtc_state);
intel_vrr_dcb_reset(old_crtc_state, crtc);
intel_crtc_update_active_timings(old_crtc_state, false);
}

13
drivers/gpu/drm/i915/display/intel_vrr.c
View File

@ -646,6 +646,19 @@ void intel_vrr_set_transcoder_timings(const struct intel_crtc_state *crtc_state)
EMP_AS_SDP_DB_TL(crtc_state->vrr.vsync_start));
}
void
intel_vrr_dcb_reset(const struct intel_crtc_state *old_crtc_state,
struct intel_crtc *crtc)
{
struct intel_display *display = to_intel_display(old_crtc_state);
enum pipe pipe = crtc->pipe;
if (!old_crtc_state->vrr.dc_balance.enable)
return;
intel_de_write(display, PIPEDMC_DCB_BALANCE_RESET(pipe), 0);
}
void intel_vrr_send_push(struct intel_dsb *dsb,
const struct intel_crtc_state *crtc_state)
{

3
drivers/gpu/drm/i915/display/intel_vrr.h
View File

@ -11,6 +11,7 @@
struct drm_connector_state;
struct intel_atomic_state;
struct intel_connector;
struct intel_crtc;
struct intel_crtc_state;
struct intel_dsb;
struct intel_display;
@ -39,6 +40,8 @@ bool intel_vrr_is_fixed_rr(const struct intel_crtc_state *crtc_state);
void intel_vrr_transcoder_enable(const struct intel_crtc_state *crtc_state);
void intel_vrr_transcoder_disable(const struct intel_crtc_state *crtc_state);
void intel_vrr_set_fixed_rr_timings(const struct intel_crtc_state *crtc_state);
void intel_vrr_dcb_reset(const struct intel_crtc_state *old_crtc_state,
struct intel_crtc *crtc);
bool intel_vrr_always_use_vrr_tg(struct intel_display *display);
int intel_vrr_safe_window_start(const struct intel_crtc_state *crtc_state);
int intel_vrr_vmin_safe_window_end(const struct intel_crtc_state *crtc_state);