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gpu: nvgpu: Apply GM20B dfs_det_cal mask

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Applied dfs_det_cal field mask when updating DFS external calibration
setting to prevent overflow for negative setting (not happening so far
with ADC offset always below Vmin, but may be needed if/when ADC fusing
changes).

Change-Id: I94b415edec84111b957b73ccfc80c1a8640b8e3a
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-on: http://git-master/r/1504242
(cherry picked from commit 9b8072ffcc02f6684a56609c25d1d77ed0852f7a)
Reviewed-on: https://git-master.nvidia.com/r/1525831
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Alex Frid
2017-06-16 23:15:38 -07:00
committed by mobile promotions
parent 20d1b9a40d
commit b260df606b
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/nvgpu/gm20b/clk_gm20b.c
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@@ -416,7 +416,7 @@ static void clk_set_dfs_ext_cal(struct gk20a *g, u32 dfs_det_cal)
data = gk20a_readl(g, trim_gpc_bcast_gpcpll_dvfs2_r());
data &= ~(BIT(DFS_DET_RANGE + 1) - 1);
data |= dfs_det_cal;
data |= dfs_det_cal & (BIT(DFS_DET_RANGE + 1) - 1);
gk20a_writel(g, trim_gpc_bcast_gpcpll_dvfs2_r(), data);
data = gk20a_readl(g, trim_sys_gpcpll_dvfs1_r());