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drm/i915/gen9: don't call ilk_pipe_pixel_rate() twice on the same function 

We used to call skl_pipe_pixel_rate(), which used to be a single
one-line return, but now we're  calling ilk_pipe_pixel_rate() which is
not as simple, so it's better to just call it once and store the
computed value for reuse.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1475872138-16194-2-git-send-email-paulo.r.zanoni@intel.com
This commit is contained in:
Paulo Zanoni 2016-10-07 17:28:58 -03:00
parent cfd7e3a202
commit 30d1b5fe8c
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_pm.c
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@ -3754,14 +3754,18 @@ skl_compute_wm_level(const struct drm_i915_private *dev_priv,
static uint32_t
skl_compute_linetime_wm(struct intel_crtc_state *cstate)
{
uint32_t pixel_rate;
if (!cstate->base.active)
return 0;
if (WARN_ON(ilk_pipe_pixel_rate(cstate) == 0))
pixel_rate = ilk_pipe_pixel_rate(cstate);
if (WARN_ON(pixel_rate == 0))
return 0;
return DIV_ROUND_UP(8 * cstate->base.adjusted_mode.crtc_htotal * 1000,
ilk_pipe_pixel_rate(cstate));
pixel_rate);
}
static void skl_compute_transition_wm(struct intel_crtc_state *cstate,