drm/i915: Kill intel_crtc->cursor_{width, height} (v2)
authorMatt Roper <matthew.d.roper@intel.com>
Fri, 27 Feb 2015 18:12:00 +0000 (10:12 -0800)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 17 Mar 2015 21:29:47 +0000 (22:29 +0100)
commit3dd512fbda0d87d1c3fb44bf878b262baee98fb6
tree8060b3e79cdc3112cfc2740c04ef308a871dfa16
parent03be70050c85768e9ce7c0d0887110d1b629e127
drm/i915: Kill intel_crtc->cursor_{width, height} (v2)

The cursor size fields in intel_crtc just duplicate the data from
cursor->state.crtc_{w,h} so we don't need them any more.  Worse, their
use in the watermark code actually introduces a subtle bug since they
don't get updated to mirror the state values until the plane commit
stage, which is *after* we've already used them to calculate new
watermark values.  This happens because we had to move watermark updates
slightly earlier (outside vblank evasion) in commit

        commit 32b7eeec4d1e861230b09d437e95d76c86ff4a68
        Author: Matt Roper <matthew.d.roper@intel.com>
        Date:   Wed Dec 24 07:59:06 2014 -0800

            drm/i915: Refactor work that can sleep out of commit (v7)

Dropping the intel_crtc fields and just using the state values (which
are properly updated by the time watermark updates happen) should solve
the problem.

Aside from the actual removal of the struct fields (which are formatted
in a way that I couldn't figure out how to match in Coccinelle), the
rest of this patch was generated via the following semantic patch:

        // Drop assignment
        @@
        struct intel_crtc *C;
        struct drm_plane_state S;
        @@
        (
        - C->cursor_width = S.crtc_w;
        |
        - C->cursor_height = S.crtc_h;
        )

        // Replace usage
        @@
        struct intel_crtc *C;
        expression E;
        @@
        (
        - C->cursor_width
        + C->base.cursor->state->crtc_w
        |
        - C->cursor_height
        + C->base.cursor->state->crtc_h
        |
        - to_intel_crtc(E)->cursor_width
        + E->cursor->state->crtc_w
        |
        - to_intel_crtc(E)->cursor_height
        + E->cursor->state->crtc_h
        )

v2: Rebase

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Joe Konno <joe.konno@linux.intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89346
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_debugfs.c
drivers/gpu/drm/i915/intel_display.c
drivers/gpu/drm/i915/intel_drv.h
drivers/gpu/drm/i915/intel_pm.c