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SubjectRe: [PATCH v2 11/11] clk: qcom: gpucc-msm8998: Allow fabia gpupll0 rate setting
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Quoting AngeloGioacchino Del Regno (2021-01-14 14:10:59)
> The GPU PLL0 is not a fixed PLL and the rate can be set on it:
> this is necessary especially on boards which bootloader is setting
> a very low rate on this PLL before booting Linux, which would be
> unsuitable for postdividing to reach the maximum allowed Adreno GPU
> frequency of 710MHz (or, actually, even 670MHz..) on this SoC.
>
> To allow setting rates on the GPU PLL0, also define VCO boundaries
> and set the CLK_SET_RATE_PARENT flag to the GPU PLL0 postdivider.
>
> With this change, the Adreno GPU is now able to scale through all
> the available frequencies.

BTW, you're probably undervolting your GPU and clocking it higher
than it should be at the voltage from boot.

>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
> ---
> drivers/clk/qcom/gpucc-msm8998.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/qcom/gpucc-msm8998.c b/drivers/clk/qcom/gpucc-msm8998.c
> index 1a518c4915b4..fedfffaf0a8d 100644
> --- a/drivers/clk/qcom/gpucc-msm8998.c
> +++ b/drivers/clk/qcom/gpucc-msm8998.c
> @@ -50,6 +50,11 @@ static struct clk_branch gpucc_cxo_clk = {
> },
> };
>
> +static struct pll_vco fabia_vco[] = {

Should be const.

> + { 249600000, 2000000000, 0 },
> + { 125000000, 1000000000, 1 },
> +};
> +
> static const struct clk_div_table post_div_table_fabia_even[] = {
> { 0x0, 1 },
> { 0x1, 2 },

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