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| author | Dave Airlie <airlied@redhat.com> | 2021-05-07 03:55:43 +0200 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2021-05-07 03:55:44 +0200 |
| commit | 365002da3c46333dcd4c0ef72d3b570d1af8b25c (patch) | |
| tree | 39da2035cbf51f6dcdb69815c62bf7d104e51c49 | |
| parent | Merge tag 'drm-intel-next-fixes-2021-04-27' of git://anongit.freedesktop.org/... (diff) | |
| parent | Merge tag 'gvt-next-fixes-2021-04-29' of https://github.com/intel/gvt-linux i... (diff) | |
| download | linux-365002da3c46333dcd4c0ef72d3b570d1af8b25c.tar.xz linux-365002da3c46333dcd4c0ef72d3b570d1af8b25c.zip | |
Merge tag 'drm-intel-next-fixes-2021-04-30' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
drm/i915 GVT fixes for v5.13-rc1:
- Fix a possible division by zero in vgpu display rate calculation
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87wnsk16sa.fsf@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/gvt/handlers.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c index 477badfcb258..dda320749c65 100644 --- a/drivers/gpu/drm/i915/gvt/handlers.c +++ b/drivers/gpu/drm/i915/gvt/handlers.c @@ -669,8 +669,8 @@ static void vgpu_update_refresh_rate(struct intel_vgpu *vgpu) link_n = vgpu_vreg_t(vgpu, PIPE_LINK_N1(TRANSCODER_A)); /* Get H/V total from transcoder timing */ - htotal = (vgpu_vreg_t(vgpu, HTOTAL(TRANSCODER_A)) >> TRANS_HTOTAL_SHIFT) + 1; - vtotal = (vgpu_vreg_t(vgpu, VTOTAL(TRANSCODER_A)) >> TRANS_VTOTAL_SHIFT) + 1; + htotal = (vgpu_vreg_t(vgpu, HTOTAL(TRANSCODER_A)) >> TRANS_HTOTAL_SHIFT); + vtotal = (vgpu_vreg_t(vgpu, VTOTAL(TRANSCODER_A)) >> TRANS_VTOTAL_SHIFT); if (dp_br && link_n && htotal && vtotal) { u64 pixel_clk = 0; @@ -682,7 +682,7 @@ static void vgpu_update_refresh_rate(struct intel_vgpu *vgpu) pixel_clk *= MSEC_PER_SEC; /* Calcuate refresh rate by (pixel_clk / (h_total * v_total)) */ - new_rate = DIV64_U64_ROUND_CLOSEST(pixel_clk, div64_u64(mul_u32_u32(htotal, vtotal), MSEC_PER_SEC)); + new_rate = DIV64_U64_ROUND_CLOSEST(mul_u64_u32_shr(pixel_clk, MSEC_PER_SEC, 0), mul_u32_u32(htotal + 1, vtotal + 1)); if (*old_rate != new_rate) *old_rate = new_rate; |