From: Stephen Boyd <sboyd@kernel.org>
To: Amit Nischal <anischal@codeaurora.org>
Cc: Michael Turquette <mturquette@baylibre.com>,
Andy Gross <andy.gross@linaro.org>,
David Brown <david.brown@linaro.org>,
Rajendra Nayak <rnayak@codeaurora.org>,
Odelu Kukatla <okukatla@codeaurora.org>,
Taniya Das <tdas@codeaurora.org>,
linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org,
linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-clk-owner@vger.kernel.org
Subject: Re: [PATCH 2/4] clk: qcom: Add clk_rcg2_gfx3d_ops for SDM845
Date: Thu, 02 Aug 2018 15:44:29 -0700 [thread overview]
Message-ID: <153324986956.10763.5124619734269160725@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <07e0321116993d27d6585bd1a186328d@codeaurora.org>
Quoting Amit Nischal (2018-07-30 04:28:56)
> On 2018-07-25 12:28, Stephen Boyd wrote:
> >
> > Ok. Sounds good! Is the rate range call really needed? It can't be
> > determined in the PLL code with some table or avoided by making sure
> > GPU
> > uses OPP table with only approved frequencies?
> >
>
> Currently fabia PLL code does not have any table to check this and
> intention
> was to avoid relying on the client to call set_rate with only approved
> frequencies so we have added the set_rate_range() call in the GPUCC
> driver
> in order to set the rate range.
>
But GPU will use OPP so it doesn't seem like it really buys us anything
here. And it really doesn't matter when the clk driver implementation
doesn't use the min/max to clamp the values of the round_rate() call. Is
that being done here? I need to double check. I would be more convinced
if the implementation was looking at min/max to constrain the rate
requested.
next prev parent reply other threads:[~2018-08-02 22:44 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-06 11:41 [PATCH 0/4] Add QCOM graphics clock controller driver for SDM845 Amit Nischal
2018-06-06 11:41 ` [PATCH 1/4] clk: qcom: gdsc: Add support to enable/disable the clocks with GDSC Amit Nischal
2018-07-09 5:34 ` Stephen Boyd
2018-07-12 12:23 ` Amit Nischal
2018-07-25 6:52 ` Stephen Boyd
2018-07-30 11:14 ` Amit Nischal
2018-06-06 11:41 ` [PATCH 2/4] clk: qcom: Add clk_rcg2_gfx3d_ops for SDM845 Amit Nischal
2018-07-09 6:15 ` Stephen Boyd
2018-07-12 12:30 ` Amit Nischal
2018-07-25 6:58 ` Stephen Boyd
2018-07-30 11:28 ` Amit Nischal
2018-08-02 22:44 ` Stephen Boyd [this message]
2018-08-06 9:07 ` Amit Nischal
2018-08-06 15:04 ` Jordan Crouse
2018-08-08 5:58 ` Stephen Boyd
2018-08-08 14:51 ` Jordan Crouse
2018-08-13 6:30 ` Amit Nischal
2018-06-06 11:41 ` [PATCH 3/4] dt-bindings: clock: Introduce QCOM Graphics clock bindings Amit Nischal
2018-07-09 5:38 ` Stephen Boyd
2018-07-12 12:32 ` Amit Nischal
2018-06-06 11:41 ` [PATCH 4/4] clk: qcom: Add graphics clock controller driver for SDM845 Amit Nischal
2018-07-09 6:07 ` Stephen Boyd
2018-07-12 12:38 ` Amit Nischal
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