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| author | Ville Syrjälä | 2013-09-24 20:26:25 +0200 |
|---|---|---|
| committer | Daniel Vetter | 2013-10-10 12:46:52 +0200 |
| commit | 811bbf05447b17db2fb13387da9b7d553438d5c6 (patch) | |
| tree | bd4231488743512b78b7d0d1fff1f5af36095610 /drivers/gpu/drm/i915/intel_display.c | |
| parent | drm/i915: Make sure we respect n.max on VLV (diff) | |
| download | kernel-qcow2-linux-811bbf05447b17db2fb13387da9b7d553438d5c6.tar.gz kernel-qcow2-linux-811bbf05447b17db2fb13387da9b7d553438d5c6.tar.xz kernel-qcow2-linux-811bbf05447b17db2fb13387da9b7d553438d5c6.zip | |
drm/i915: Clarify VLV PLL p1 limits
For some reason there's a sort of off by one issue with the p1 divider.
The actual p1 limits according to
VLV2_DPLL_mphy_hsdpll_frequency_table_ww6_rev1p1.xlsm is 2-3, so we should
just say that instead of saying 1-3 and avoiding the 1 via the choice of
comparison operator.
I don't know why we're using different p1 limits for intel_limits_vlv_dac
and intel_limits_vlv_hdmi, but let's preserve that for now.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ed95eb25833a..99c56b8f6462 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -317,7 +317,7 @@ static const intel_limit_t intel_limits_vlv_dac = { .m1 = { .min = 2, .max = 3 }, .m2 = { .min = 11, .max = 156 }, .p = { .min = 10, .max = 30 }, - .p1 = { .min = 1, .max = 3 }, + .p1 = { .min = 2, .max = 3 }, .p2 = { .dot_limit = 270000, .p2_slow = 2, .p2_fast = 20 }, }; @@ -330,7 +330,7 @@ static const intel_limit_t intel_limits_vlv_hdmi = { .m1 = { .min = 2, .max = 3 }, .m2 = { .min = 11, .max = 156 }, .p = { .min = 10, .max = 30 }, - .p1 = { .min = 2, .max = 3 }, + .p1 = { .min = 3, .max = 3 }, .p2 = { .dot_limit = 270000, .p2_slow = 2, .p2_fast = 20 }, }; @@ -688,7 +688,7 @@ vlv_find_best_dpll(const intel_limit_t *limit, struct drm_crtc *crtc, /* based on hardware requirement, prefer smaller n to precision */ for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) { - for (clock.p1 = limit->p1.max; clock.p1 > limit->p1.min; clock.p1--) { + for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) { for (clock.p2 = limit->p2.p2_fast; clock.p2 > 0; clock.p2 -= clock.p2 > 10 ? 2 : 1) { clock.p = clock.p1 * clock.p2; |