4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> commit 7cada4d0b7a0fb813dbc9777fec092e9ed0546e9 upstream. Plane sanitation needs vblank interrupts (on account of CxSR disable). So let's restore vblank interrupts earlier. v2: Make it actually build v3: Add comment to explain why we need this (Daniel) Cc: stable@xxxxxxxxxxxxxxx Cc: Dennis <dennis.nezic@xxxxxxxxxxx> Tested-by: Dennis <dennis.nezic@xxxxxxxxxxx> Tested-by: Peter Nowee <peter.nowee@xxxxxxxxx> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105637 Fixes: b1e01595a66d ("drm/i915: Redo plane sanitation during readout") Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Reviewed-by: Daniel Vetter <daniel.vetter@xxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/20181003144951.4397-1-ville.syrjala@xxxxxxxxxxxxxxx (cherry picked from commit 68bc30deac625b8be8d3950b30dc93d09a3645f5) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_display.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -15216,13 +15216,9 @@ static void intel_sanitize_crtc(struct i I915_READ(reg) & ~PIPECONF_FRAME_START_DELAY_MASK); } - /* restore vblank interrupts to correct state */ - drm_crtc_vblank_reset(&crtc->base); if (crtc->active) { struct intel_plane *plane; - drm_crtc_vblank_on(&crtc->base); - /* Disable everything but the primary plane */ for_each_intel_plane_on_crtc(dev, crtc, plane) { const struct intel_plane_state *plane_state = @@ -15549,7 +15545,6 @@ intel_modeset_setup_hw_state(struct drm_ struct drm_modeset_acquire_ctx *ctx) { struct drm_i915_private *dev_priv = to_i915(dev); - enum pipe pipe; struct intel_crtc *crtc; struct intel_encoder *encoder; int i; @@ -15560,15 +15555,23 @@ intel_modeset_setup_hw_state(struct drm_ /* HW state is read out, now we need to sanitize this mess. */ get_encoder_power_domains(dev_priv); - intel_sanitize_plane_mapping(dev_priv); + /* + * intel_sanitize_plane_mapping() may need to do vblank + * waits, so we need vblank interrupts restored beforehand. + */ + for_each_intel_crtc(&dev_priv->drm, crtc) { + drm_crtc_vblank_reset(&crtc->base); - for_each_intel_encoder(dev, encoder) { - intel_sanitize_encoder(encoder); + if (crtc->active) + drm_crtc_vblank_on(&crtc->base); } - for_each_pipe(dev_priv, pipe) { - crtc = intel_get_crtc_for_pipe(dev_priv, pipe); + intel_sanitize_plane_mapping(dev_priv); + + for_each_intel_encoder(dev, encoder) + intel_sanitize_encoder(encoder); + for_each_intel_crtc(&dev_priv->drm, crtc) { intel_sanitize_crtc(crtc, ctx); intel_dump_pipe_config(crtc, crtc->config, "[setup_hw_state]");
