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| author | Matt Roper <matthew.d.roper@intel.com> | 2016-02-08 11:05:28 -0800 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2016-02-09 11:24:39 +0200 |
| commit | e2e407dc093f530b771ee8bf8fe1be41e3cea8b3 (patch) | |
| tree | c011e4ffc7ce86d65789663071d1dcb67000bb7a /drivers/gpu | |
| parent | 0fd64e8213772829788309f269e15bcb28c34195 (diff) | |
| download | linux-e2e407dc093f530b771ee8bf8fe1be41e3cea8b3.tar.gz linux-e2e407dc093f530b771ee8bf8fe1be41e3cea8b3.tar.bz2 linux-e2e407dc093f530b771ee8bf8fe1be41e3cea8b3.zip | |
drm/i915: Pretend cursor is always on for ILK-style WM calculations (v2)
Due to our lack of two-step watermark programming, our driver has
historically pretended that the cursor plane is always on for the
purpose of watermark calculations; this helps avoid serious flickering
when the cursor turns off/on (e.g., when the user moves the mouse
pointer to a different screen). That workaround was accidentally
dropped as we started working toward atomic watermark updates. Since we
still aren't quite there yet with two-stage updates, we need to
resurrect the workaround and treat the cursor as always active.
v2: Tweak cursor width calculations slightly to more closely match the
logic we used before the atomic overhaul began. (Ville)
Cc: simdev11@outlook.com
Cc: manfred.kitzbichler@gmail.com
Cc: drm-intel-fixes@lists.freedesktop.org
Reported-by: simdev11@outlook.com
Reported-by: manfred.kitzbichler@gmail.com
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93892
Fixes: 43d59eda1 ("drm/i915: Eliminate usage of plane_wm_parameters from ILK-style WM code (v2)")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1454479611-6804-1-git-send-email-matthew.d.roper@intel.com
(cherry picked from commit b2435692dbb709d4c8ff3b2f2815c9b8423b72bb)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1454958328-30129-1-git-send-email-matthew.d.roper@intel.com
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index eb5fa05cf476..a234687792f0 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -1783,16 +1783,20 @@ static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state *cstate, const struct intel_plane_state *pstate, uint32_t mem_value) { - int bpp = pstate->base.fb ? pstate->base.fb->bits_per_pixel / 8 : 0; + /* + * We treat the cursor plane as always-on for the purposes of watermark + * calculation. Until we have two-stage watermark programming merged, + * this is necessary to avoid flickering. + */ + int cpp = 4; + int width = pstate->visible ? pstate->base.crtc_w : 64; - if (!cstate->base.active || !pstate->visible) + if (!cstate->base.active) return 0; return ilk_wm_method2(ilk_pipe_pixel_rate(cstate), cstate->base.adjusted_mode.crtc_htotal, - drm_rect_width(&pstate->dst), - bpp, - mem_value); + width, cpp, mem_value); } /* Only for WM_LP. */ |