Op 08-07-2019 om 14:53 schreef Ville Syrjala:
> From: Ville Syrjälä <ville.syrj...@linux.intel.com>
>
> Bspec says that glk+ max downscale factor is <3.0 for all pixel formats.
> Older platforms had a max of <2.0 for NV12. Update the code to deal with
> this.
>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index ee93577bdf95..2b8a6a84605c 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -14472,7 +14472,7 @@ skl_max_scale(const struct intel_crtc_state
> *crtc_state,
> {
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> - int max_scale, mult;
> + int max_scale;
> int crtc_clock, max_dotclk, tmpclk1, tmpclk2;
>
> if (!crtc_state->base.enable)
> @@ -14493,8 +14493,11 @@ skl_max_scale(const struct intel_crtc_state
> *crtc_state,
> * or
> * cdclk/crtc_clock
> */
> - mult = drm_format_info_is_yuv_semiplanar(format) ? 2 : 3;
> - tmpclk1 = (1 << 16) * mult - 1;
> + if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv) ||
> + !drm_format_info_is_yuv_semiplanar(format))
> + tmpclk1 = 0x30000 - 1;
> + else
> + tmpclk1 = 0x20000 - 1;
> tmpclk2 = (1 << 8) * ((max_dotclk << 8) / crtc_clock);
> max_scale = min(tmpclk1, tmpclk2);
>
For this patch and 4, 6, 7, 8:
Reviewed-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Patch 4 seems to be exactly the same as the patch I wrote for it, so lets
upstream this ASAP before someone else does as well. ;)
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