From 355d210aad943ed12e70c79576406c0c303af815 Mon Sep 17 00:00:00 2001 From: Vinod Govindapillai Date: Tue, 28 May 2024 14:48:26 +0300 Subject: [PATCH] drm/i915/display: update handling of FBC when VT-d active workaround MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Move the handling of the disabling FBC when VT-d is active wa as part of the intel_fbc_check_plane(). As the hw is still there, intel_fbc_sanitize should be able to handle the state properly. v2: update the patch description (Jani Nikula) v3: fix the return value in wa handling (Jani Nikula) Bspec: 21664 Suggested-by: Ville Syrjälä Signed-off-by: Vinod Govindapillai Reviewed-by: Jouni Högander Link: https://patchwork.freedesktop.org/patch/msgid/20240528114826.134958-1-vinod.govindapillai@intel.com --- drivers/gpu/drm/i915/display/intel_fbc.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c index 8e956e7a1964..67116c9f1464 100644 --- a/drivers/gpu/drm/i915/display/intel_fbc.c +++ b/drivers/gpu/drm/i915/display/intel_fbc.c @@ -1237,6 +1237,12 @@ static int intel_fbc_check_plane(struct intel_atomic_state *state, return 0; } + /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ + if (i915_vtd_active(i915) && (IS_SKYLAKE(i915) || IS_BROXTON(i915))) { + plane_state->no_fbc_reason = "VT-d enabled"; + return 0; + } + crtc_state = intel_atomic_get_new_crtc_state(state, crtc); if (crtc_state->hw.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) { @@ -1822,19 +1828,6 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *i915) return 0; } -static bool need_fbc_vtd_wa(struct drm_i915_private *i915) -{ - /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ - if (i915_vtd_active(i915) && - (IS_SKYLAKE(i915) || IS_BROXTON(i915))) { - drm_info(&i915->drm, - "Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); - return true; - } - - return false; -} - void intel_fbc_add_plane(struct intel_fbc *fbc, struct intel_plane *plane) { plane->fbc = fbc; @@ -1880,9 +1873,6 @@ void intel_fbc_init(struct drm_i915_private *i915) { enum intel_fbc_id fbc_id; - if (need_fbc_vtd_wa(i915)) - DISPLAY_RUNTIME_INFO(i915)->fbc_mask = 0; - i915->display.params.enable_fbc = intel_sanitize_fbc_option(i915); drm_dbg_kms(&i915->drm, "Sanitized enable_fbc value: %d\n", i915->display.params.enable_fbc); -- 2.49.0