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

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>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c b/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
index ae6cd327..5f969e79 100644
--- a/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
+++ b/drivers/gpu/nvgpu/gp106/clk_arb_gp106.c
@@ -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;