From 0211c2a0ea600e25db3044daaeff4fe41c3ed6d9 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 17 Jun 2022 22:59:48 +0300 Subject: [PATCH] drm/i915: Skip wm/ddb readout for disabled pipes MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The stuff programmed into the wm/ddb registers of planes on disabled pipes doesn't matter. So during readout just leave our software state tracking for those zeroed. This should avoid us trying too hard to clean up after whatever mess the VBIOS/GOP left in there. The actual hardware state will get cleaned up if/when we enable the pipe anyway. Cc: stable@vger.kernel.org Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/5711 Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20220617195948.24007-1-ville.syrjala@linux.intel.com Reviewed-by: Stanislav Lisovskiy (cherry picked from commit b183db8f4783ca2efc9b47734f15aad9477a108a) Signed-off-by: Rodrigo Vivi --- drivers/gpu/drm/i915/intel_pm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f06babd..9fe4b58 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6561,7 +6561,10 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv) enum plane_id plane_id; u8 slices; - skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal); + memset(&crtc_state->wm.skl.optimal, 0, + sizeof(crtc_state->wm.skl.optimal)); + if (crtc_state->hw.active) + skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal); crtc_state->wm.skl.raw = crtc_state->wm.skl.optimal; memset(&dbuf_state->ddb[pipe], 0, sizeof(dbuf_state->ddb[pipe])); @@ -6572,6 +6575,9 @@ void skl_wm_get_hw_state(struct drm_i915_private *dev_priv) struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; + if (!crtc_state->hw.active) + continue; + skl_ddb_get_hw_plane_state(dev_priv, crtc->pipe, plane_id, ddb, ddb_y); -- 2.7.4