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gpu: nvgpu: make sure gpc2clk is greater than DVCO min

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For V/f point with gpc2clk exactly equal to DVCO min, we observe lower
than expected effective clock. Make sure min frequency for gpc2clk is
greater than DVCO min.

Bug 200412996

Change-Id: I85c33852c56c7a642aa5c85987d2da4147e73c22
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1764923
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Thomas Fleury
2018-06-28 16:58:48 -07:00
committed by mobile promotions
parent 1691c34a68
commit ead0dfaaa3
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
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@@ -67,8 +67,8 @@ int gp106_get_arbiter_clk_range(struct gk20a *g, u32 api_domain,
/* WAR for DVCO min */
if (api_domain == CTRL_CLK_DOMAIN_GPC2CLK)
if ((pfllobjs->max_min_freq_mhz) &&
(pfllobjs->max_min_freq_mhz > limit_min_mhz))
limit_min_mhz = pfllobjs->max_min_freq_mhz;
(pfllobjs->max_min_freq_mhz >= limit_min_mhz))
limit_min_mhz = pfllobjs->max_min_freq_mhz + 1;
*min_mhz = limit_min_mhz;
*max_mhz = p0_info->max_mhz;