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drm/i915: Track full cdclk state for the logical and actual cdclk frequencies

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The current dev_cdclk vs. cdclk vs. atomic_cdclk_freq is quite a mess.
So here I'm introducing the "actual" and "logical" naming for our
cdclk state. "actual" is what we'll bash into the hardware and "logical"
is what everyone should use for state computaion/checking and whatnot.
We'll track both using the intel_cdclk_state as both will need other
differing parameters than just the actual cdclk frequency.

While doing that we can at the same time unify the appearance of the
.modeset_calc_cdclk() implementations a little bit.

v2: Commit dev_priv->cdclk.actual since that already has the
    new state by the time .modeset_commit_cdclk() is called.
v3: s/locical/logical/ and improve the docs a bit

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170120182205.8141-9-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä
2017-01-20 20:21:59 +02:00
parent 49cd97a35d
commit bb0f4aab0e
6 changed files with 127 additions and 83 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@@ -2108,7 +2108,7 @@ hsw_compute_linetime_wm(const struct intel_crtc_state *cstate)
return 0;
if (WARN_ON(adjusted_mode->crtc_clock == 0))
return 0;
if (WARN_ON(intel_state->cdclk == 0))
if (WARN_ON(intel_state->cdclk.logical.cdclk == 0))
return 0;
/* The WM are computed with base on how long it takes to fill a single
@@ -2117,7 +2117,7 @@ hsw_compute_linetime_wm(const struct intel_crtc_state *cstate)
linetime = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
adjusted_mode->crtc_clock);
ips_linetime = DIV_ROUND_CLOSEST(adjusted_mode->crtc_htotal * 1000 * 8,
intel_state->cdclk);
intel_state->cdclk.logical.cdclk);
return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
PIPE_WM_LINETIME_TIME(linetime);