From: Stephen Boyd <sboyd@kernel.org>
To: broonie@kernel.org, dillon.minfei@gmail.com, linus.walleij@linaro.org
Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
linux-stm32@st-md-mailman.stormreply.com,
dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org,
dillon min <dillon.minfei@gmail.com>
Subject: Re: [PATCH v5 5/8] clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate, fix duplicated ltdc clock register to 'clk_core' case ltdc's clock turn off by clk_disable_unused()
Date: Tue, 26 May 2020 18:44:55 -0700 [thread overview]
Message-ID: <159054389592.88029.12389551390229328953@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <1590378348-8115-6-git-send-email-dillon.minfei@gmail.com>
Quoting dillon.minfei@gmail.com (2020-05-24 20:45:45)
> From: dillon min <dillon.minfei@gmail.com>
>
> ltdc set clock rate crashed
> 'post_div_data[]''s pll_num is PLL_I2S, PLL_SAI (number is 1,2). but,
Please write "post_div_data[]'s" if it is possessive. "But" doesn't
start a sentence. This is one sentence, not two.
> as pll_num is offset of 'clks[]' input to clk_register_pll_div(), which
> is FCLK, CLK_LSI, defined in 'include/dt-bindings/clock/stm32fx-clock.h'
> so, this is a null object at the register time.
> then, in ltdc's clock is_enabled(), enable(), will call to_clk_gate().
> will return a null object, cause kernel crashed.
> need change pll_num to PLL_VCO_I2S, PLL_VCO_SAI for 'post_div_data[]'
>
> duplicated ltdc clock
> 'stm32f429_gates[]' has a member 'ltdc' register to 'clk_core', but no
> upper driver use it, ltdc driver use the lcd-tft defined in
> 'stm32f429_aux_clk[]'. after system startup, as stm32f429_gates[]'s ltdc
> enable_count is zero, so turn off by clk_disable_unused()
I sort of follow this. Is this another patch? Seems like two things are
going on here.
>
> Changes since V3:
> 1 drop last wrong changes about 'CLK_IGNORE_UNUSED' patch
> 2 fix PLL_SAI mismatch with PLL_VCO_SAI
This change log goes under the --- below.
>
> Signed-off-by: dillon min <dillon.minfei@gmail.com>
Any Fixes tag?
next prev parent reply other threads:[~2020-05-27 1:44 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-25 3:45 [PATCH v5 0/8] Enable ili9341 and l3gd20 on stm32f429-disco dillon.minfei
2020-05-25 3:45 ` [PATCH v5 1/8] ARM: dts: stm32: Add dma config for spi5 dillon.minfei
2020-05-25 3:45 ` [PATCH v5 2/8] ARM: dts: stm32: Add pin map for ltdc & spi5 on stm32f429-disco board dillon.minfei
2020-05-25 3:45 ` [PATCH v5 3/8] ARM: dts: stm32: enable ltdc binding with ili9341, gyro l3gd20 on stm32429-disco board dillon.minfei
2020-05-25 3:45 ` [PATCH v5 4/8] dt-bindings: display: panel: Add ilitek ili9341 panel bindings dillon.minfei
2020-05-25 12:20 ` Linus Walleij
2020-05-25 3:45 ` [PATCH v5 5/8] clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate, fix duplicated ltdc clock register to 'clk_core' case ltdc's clock turn off by clk_disable_unused() dillon.minfei
2020-05-27 1:44 ` Stephen Boyd [this message]
2020-05-27 3:30 ` dillon min
2020-05-25 3:45 ` [PATCH v5 6/8] drm/panel: Add ilitek ili9341 panel driver dillon.minfei
2020-05-25 12:23 ` Linus Walleij
2020-05-26 7:46 ` Andy Shevchenko
2020-05-26 9:08 ` dillon min
2020-05-26 10:38 ` Noralf Trønnes
2020-06-30 15:32 ` dillon min
2020-05-25 3:45 ` [PATCH v5 7/8] spi: stm32: Add 'SPI_SIMPLEX_RX', 'SPI_3WIRE_RX' support for stm32f4 dillon.minfei
2020-05-25 3:45 ` [PATCH v5 8/8] spi: flags 'SPI_CONTROLLER_MUST_RX' and 'SPI_CONTROLLER_MUST_TX' can't be coexit with 'SPI_3WIRE' mode dillon.minfei
2020-05-26 9:19 ` [PATCH v5 0/8] Enable ili9341 and l3gd20 on stm32f429-disco Mark Brown
[not found] <broonie@kernel.org>
2020-05-25 3:40 ` dillon.minfei
2020-05-25 3:40 ` [PATCH v5 5/8] clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate, fix duplicated ltdc clock register to 'clk_core' case ltdc's clock turn off by clk_disable_unused() dillon.minfei
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