From: Linus Walleij <linus.walleij@linaro.org>
To: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk <linux-clk@vger.kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Stephan Gerhold <stephan@gerhold.net>
Subject: Re: [PATCH] clk: ux500: Initialize DSI clocks before registering
Date: Sun, 22 Dec 2019 22:46:03 +0100 [thread overview]
Message-ID: <CACRpkdaE1T6yt4u5uO+SZB18KjrVp2_4Qd9gr_aN0v5GTJ2VGw@mail.gmail.com> (raw)
In-Reply-To: <20191222202928.14142-1-linus.walleij@linaro.org>
On Sun, Dec 22, 2019 at 9:29 PM Linus Walleij <linus.walleij@linaro.org> wrote:
> The DSI clocks need to be initialized properly and cannot
> rely on boot defaults, this is especially important for the
> U8420 SYSCLK variant of the PRCMU firmware which requires
> that you poke these registers right before trying to use
> the HS DSI clock. Some vital setup such as the PRCM_TVCLK_MGT
> register will not happen unless we call this making some
> displays fail to work on the U8420.
>
> Cc: Ulf Hansson <ulf.hansson@linaro.org>
> Cc: Stephan Gerhold <stephan@gerhold.net>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Sorry I got lost in the macros for CLK_MGT_ENTRY
that does poke these registers including PRCM_TVCLK_MGT.
I need to figure out what is actually going wrong with the
DSI clocks here.
Yours,
Linus Walleij
next prev parent reply other threads:[~2019-12-22 21:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-22 20:29 [PATCH] clk: ux500: Initialize DSI clocks before registering Linus Walleij
2019-12-22 21:46 ` Linus Walleij [this message]
2019-12-23 9:16 ` Ulf Hansson
2019-12-23 9:28 ` Viresh Kumar
2019-12-23 9:33 ` Ulf Hansson
2019-12-23 16:25 ` Linus Walleij
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