Add a new module parameter 'enable_dc_balance' to allow enabling or disabling the VRR DC balance feature at runtime. The DC balance computation in intel_vrr_dc_balance_compute_config() now honours this parameter, so the feature can be toggled without recompiling.
Signed-off-by: Mitul Golani <[email protected]> --- drivers/gpu/drm/i915/display/intel_display_params.c | 3 +++ drivers/gpu/drm/i915/display/intel_display_params.h | 1 + drivers/gpu/drm/i915/display/intel_vrr.c | 4 +++- 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_params.c b/drivers/gpu/drm/i915/display/intel_display_params.c index 2aed110c5b09..ed3aa84c5d43 100644 --- a/drivers/gpu/drm/i915/display/intel_display_params.c +++ b/drivers/gpu/drm/i915/display/intel_display_params.c @@ -120,6 +120,9 @@ intel_display_param_named_unsafe(enable_psr, int, 0400, "(0=disabled, 1=enable up to PSR1, 2=enable up to PSR2) " "Default: -1 (use per-chip default)"); +intel_display_param_named_unsafe(enable_dc_balance, int, 0400, + "Enable DC Balance (0=disabled, 1=enable). Default: 1 (use per-chip default)"); + intel_display_param_named_unsafe(enable_panel_replay, int, 0400, "Enable Panel Replay (0=disabled, 1=enabled). Default: -1 (use per-chip default)"); diff --git a/drivers/gpu/drm/i915/display/intel_display_params.h b/drivers/gpu/drm/i915/display/intel_display_params.h index b95ecf728daa..8c28c27e2c46 100644 --- a/drivers/gpu/drm/i915/display/intel_display_params.h +++ b/drivers/gpu/drm/i915/display/intel_display_params.h @@ -46,6 +46,7 @@ struct drm_printer; param(bool, enable_dp_mst, true, 0600) \ param(int, enable_fbc, -1, 0600) \ param(int, enable_psr, -1, 0600) \ + param(int, enable_dc_balance, false, 0600) \ param(int, enable_panel_replay, -1, 0600) \ param(bool, psr_safest_params, false, 0400) \ param(bool, enable_psr2_sel_fetch, true, 0400) \ diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c index e36db1174440..1698c54e258b 100644 --- a/drivers/gpu/drm/i915/display/intel_vrr.c +++ b/drivers/gpu/drm/i915/display/intel_vrr.c @@ -439,10 +439,12 @@ static bool intel_vrr_dc_balance_possible(const struct intel_crtc_state *crtc_st static void intel_vrr_dc_balance_compute_config(struct intel_crtc_state *crtc_state) { + struct intel_display *display = to_intel_display(crtc_state); int guardband_usec, adjustment_usec; struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - if (!intel_vrr_dc_balance_possible(crtc_state) || !crtc_state->vrr.enable) + if (!intel_vrr_dc_balance_possible(crtc_state) || + !crtc_state->vrr.enable || !display->params.enable_dc_balance) return; crtc_state->vrr.dc_balance.vmax = crtc_state->vrr.vmax; -- 2.48.1
