diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-02-28 19:19:44 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-03-03 21:06:14 +0100 |
| commit | f4808ab86eed9b829c60b02a9ac5e86f06df0bcf (patch) | |
| tree | 732cca89422f8023bc10528ddad186205fe9998b /drivers/gpu | |
| parent | 2bb4629add2e648f1822872cce72f0fe163ce605 (diff) | |
| download | lwn-f4808ab86eed9b829c60b02a9ac5e86f06df0bcf.tar.gz lwn-f4808ab86eed9b829c60b02a9ac5e86f06df0bcf.zip | |
drm/i915: Document the find_pll() function
The proper use of find_pll() isn't always so easy to determine from the
code itself. Some documentation should help.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 878e1e3e0667..b4482b22a1ac 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -71,8 +71,24 @@ typedef struct intel_limit intel_limit_t; struct intel_limit { intel_range_t dot, vco, n, m, m1, m2, p, p1; intel_p2_t p2; - bool (* find_pll)(const intel_limit_t *, struct drm_crtc *, - int, int, intel_clock_t *, intel_clock_t *); + /** + * find_pll() - Find the best values for the PLL + * @limit: limits for the PLL + * @crtc: current CRTC + * @target: target frequency in kHz + * @refclk: reference clock frequency in kHz + * @match_clock: if provided, @best_clock P divider must + * match the P divider from @match_clock + * used for LVDS downclocking + * @best_clock: best PLL values found + * + * Returns true on success, false on failure. + */ + bool (*find_pll)(const intel_limit_t *limit, + struct drm_crtc *crtc, + int target, int refclk, + intel_clock_t *match_clock, + intel_clock_t *best_clock); }; /* FDI */ |