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Tue, 01 Jun 2021 14:48:13 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 3C7BC10002A; Tue, 1 Jun 2021 14:48:12 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node3.st.com [10.75.127.6]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 2565322176F; Tue, 1 Jun 2021 14:48:12 +0200 (CEST) Received: from lmecxl0573.lme.st.com (10.75.127.44) by SFHDAG2NODE3.st.com (10.75.127.6) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 1 Jun 2021 14:48:11 +0200 Subject: Re: [PATCH 3/4] clk: stm32: Fix stm32f429's ltdc driver hang in set clock rate To: , , , , , , , References: <1620990152-19255-1-git-send-email-dillon.minfei@gmail.com> <1620990152-19255-4-git-send-email-dillon.minfei@gmail.com> From: Patrice CHOTARD Message-ID: <6ecedc1d-3b80-0eba-a5f0-8feb3eae16cf@foss.st.com> Date: Tue, 1 Jun 2021 14:48:10 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <1620990152-19255-4-git-send-email-dillon.minfei@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [10.75.127.44] X-ClientProxiedBy: SFHDAG1NODE3.st.com (10.75.127.3) To SFHDAG2NODE3.st.com (10.75.127.6) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-06-01_06:2021-05-31, 2021-06-01 signatures=0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sboyd@kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-clk@vger.kernel.org, linaro-mm-sig@lists.linaro.org, linux-i2c@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Dillon On 5/14/21 1:02 PM, dillon.minfei@gmail.com wrote: > From: Dillon Min > > This is due to misuse ‘PLL_VCO_SAI' and'PLL_SAI' in clk-stm32f4.c > 'PLL_SAI' is 2, 'PLL_VCO_SAI' is 7(defined in > include/dt-bindings/clock/stm32fx-clock.h). > > 'post_div' point to 'post_div_data[]', 'post_div->pll_num' > is PLL_I2S or PLL_SAI. > > 'clks[PLL_VCO_SAI]' has valid 'struct clk_hw* ' return > from stm32f4_rcc_register_pll() but, at line 1777 of > driver/clk/clk-stm32f4.c, use the 'clks[post_div->pll_num]', > equal to 'clks[PLL_SAI]', this is invalid array member at that time. > > Fixes: 517633ef630e ("clk: stm32f4: Add post divisor for I2S & SAI PLLs") > Signed-off-by: Dillon Min > Acked-by: Stephen Boyd > Link: https://lore.kernel.org/linux-arm-kernel/1590564453-24499-6-git-send-email-dillon.minfei@gmail.com/ > --- > drivers/clk/clk-stm32f4.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c > index 18117ce5ff85..42ca2dd86aea 100644 > --- a/drivers/clk/clk-stm32f4.c > +++ b/drivers/clk/clk-stm32f4.c > @@ -557,13 +557,13 @@ static const struct clk_div_table post_divr_table[] = { > > #define MAX_POST_DIV 3 > static const struct stm32f4_pll_post_div_data post_div_data[MAX_POST_DIV] = { > - { CLK_I2SQ_PDIV, PLL_I2S, "plli2s-q-div", "plli2s-q", > + { CLK_I2SQ_PDIV, PLL_VCO_I2S, "plli2s-q-div", "plli2s-q", > CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 0, 5, 0, NULL}, > > - { CLK_SAIQ_PDIV, PLL_SAI, "pllsai-q-div", "pllsai-q", > + { CLK_SAIQ_PDIV, PLL_VCO_SAI, "pllsai-q-div", "pllsai-q", > CLK_SET_RATE_PARENT, STM32F4_RCC_DCKCFGR, 8, 5, 0, NULL }, > > - { NO_IDX, PLL_SAI, "pllsai-r-div", "pllsai-r", CLK_SET_RATE_PARENT, > + { NO_IDX, PLL_VCO_SAI, "pllsai-r-div", "pllsai-r", CLK_SET_RATE_PARENT, > STM32F4_RCC_DCKCFGR, 16, 2, 0, post_divr_table }, > }; > > Reviewed-by: Patrice Chotard Thanks Patrice