diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-10-04 01:31:42 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2017-10-25 20:36:01 +0300 |
| commit | 43037c86d10cea185f6518f797f6303a06e734f9 (patch) | |
| tree | 1b31aaf9b54ed433e1f6c8f79d7ae96a29cdb4d3 /drivers/gpu/drm/i915/intel_cdclk.c | |
| parent | 22a8a4fc93b14b5a8cfc785edbdc6f7bd98bffb6 (diff) | |
| download | linux-43037c86d10cea185f6518f797f6303a06e734f9.tar.xz | |
drm/i915/cnl: Allow 2 pixel per clock on Cannonlake.
This is heavily based on a initial patch provided by Ville
plus all changes provided later by Ander.
As Geminilake, Cannonlake also supports 2 pixels per clock.
Different from Geminilake we are not implementing the 99% Wa.
But we can revisit that decision later if we find out
any limitation on later CNL SKUs.
v2: Rebase on top of commit 'd305e0614601 ("drm/i915: Track
minimum acceptable cdclk instead of "minimum dotclock")'
v3: When fixing HDMI on CNL I noticed that I missed to convert
back the doubled pixel rate to cdclk.
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171003223142.26264-1-rodrigo.vivi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_cdclk.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_cdclk.c | 14 |
1 files changed, 2 insertions, 12 deletions
diff --git a/drivers/gpu/drm/i915/intel_cdclk.c b/drivers/gpu/drm/i915/intel_cdclk.c index 51cd23dd8676..e8884c2ade98 100644 --- a/drivers/gpu/drm/i915/intel_cdclk.c +++ b/drivers/gpu/drm/i915/intel_cdclk.c @@ -1866,12 +1866,7 @@ static int intel_pixel_rate_to_cdclk(struct drm_i915_private *dev_priv, int pixel_rate) { if (INTEL_GEN(dev_priv) >= 10) - /* - * FIXME: Switch to DIV_ROUND_UP(pixel_rate, 2) - * once DDI clock voltage requirements are - * handled correctly. - */ - return pixel_rate; + return DIV_ROUND_UP(pixel_rate, 2); else if (IS_GEMINILAKE(dev_priv)) /* * FIXME: Avoid using a pixel clock that is more than 99% of the cdclk @@ -2188,12 +2183,7 @@ static int intel_compute_max_dotclk(struct drm_i915_private *dev_priv) int max_cdclk_freq = dev_priv->max_cdclk_freq; if (INTEL_GEN(dev_priv) >= 10) - /* - * FIXME: Allow '2 * max_cdclk_freq' - * once DDI clock voltage requirements are - * handled correctly. - */ - return max_cdclk_freq; + return 2 * max_cdclk_freq; else if (IS_GEMINILAKE(dev_priv)) /* * FIXME: Limiting to 99% as a temporary workaround. See |