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gpu: nvgpu: Do not readback L2 ZBC RAM

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Do not read back L2 ZBC RAM. That can conflict with in-flight
transactions causing a live-lock.

Change-Id: I6122af48513b5a4b801202dc611eba58ce86aa4d
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/929580
GVS: Gerrit_Virtual_Submit
Reviewed-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
This commit is contained in:
Terje Bergstrom
2016-01-06 09:45:22 -08:00
parent 2113479bbf
commit b9cbb12132
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/nvgpu/gk20a/ltc_common.c
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@@ -53,9 +53,10 @@ static void gk20a_ltc_set_zbc_color_entry(struct gk20a *g,
for (i = 0;
i < ltc_ltcs_ltss_dstg_zbc_color_clear_value__size_1_v(); i++) {
gk20a_writel_check(g, ltc_ltcs_ltss_dstg_zbc_color_clear_value_r(i),
gk20a_writel(g, ltc_ltcs_ltss_dstg_zbc_color_clear_value_r(i),
color_val->color_l2[i]);
}
gk20a_readl(g, ltc_ltcs_ltss_dstg_zbc_index_r());
}
/*
@@ -70,8 +71,10 @@ static void gk20a_ltc_set_zbc_depth_entry(struct gk20a *g,
gk20a_writel(g, ltc_ltcs_ltss_dstg_zbc_index_r(),
ltc_ltcs_ltss_dstg_zbc_index_address_f(real_index));
gk20a_writel_check(g, ltc_ltcs_ltss_dstg_zbc_depth_clear_value_r(),
gk20a_writel(g, ltc_ltcs_ltss_dstg_zbc_depth_clear_value_r(),
depth_val->depth);
gk20a_readl(g, ltc_ltcs_ltss_dstg_zbc_index_r());
}
static int gk20a_ltc_alloc_phys_cbc(struct gk20a *g,