leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

clk: qcom: clk-rcg2: fix gfx3d frequency calculation

Browse Source 
Since the commit 948fb0969e ("clk: Always clamp the rounded rate"),
the clk_core_determine_round_nolock() would clamp the requested rate
between min and max rates from the rate request. Normally these fields
would be filled by clk_core_get_boundaries() called from
clk_round_rate().

However clk_gfx3d_determine_rate() uses a manually crafted rate request,
which did not have these fields filled. Thus the requested frequency
would be clamped to 0, resulting in weird frequencies being requested
from the hardware.

Fix this by filling min_rate and max_rate to the values valid for the
respective PLLs (0 and ULONG_MAX).

Fixes: 948fb0969e ("clk: Always clamp the rounded rate")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220419235447.1586192-1-dmitry.baryshkov@linaro.org
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reported-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2022-04-20 02:54:47 +03:00 committed by Stephen Boyd
parent 37843d0f6e
commit d968fda3de
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/clk/qcom/clk-rcg2.c
View File

@ -818,7 +818,7 @@ EXPORT_SYMBOL_GPL(clk_pixel_ops);
static int clk_gfx3d_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
struct clk_rate_request parent_req = { };
struct clk_rate_request parent_req = { .min_rate = 0, .max_rate = ULONG_MAX };
struct clk_rcg2_gfx3d *cgfx = to_clk_rcg2_gfx3d(hw);
struct clk_hw *xo, *p0, *p1, *p2;
unsigned long p0_rate;