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Fri, 05 Nov 2021 06:42:52 -0700 (PDT) Received: from aford-OptiPlex-7050.logicpd.com ([174.46.170.158]) by smtp.gmail.com with ESMTPSA id j15sm4537909ile.65.2021.11.05.06.42.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Nov 2021 06:42:50 -0700 (PDT) From: Adam Ford To: linux-arm-kernel@lists.infradead.org Cc: tharvey@gateworks.com, frieder.schrempf@kontron.de, linux-media@vger.kernel.org, laurent.pinchart@ideasonboard.com, aford@beaconembedded.com, cstevens@beaconembedded.com, Adam Ford , Rob Herring , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Catalin Marinas , Will Deacon , Lucas Stach , Peng Fan , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/5] soc: imx: imx8m-blk-ctrl: Fix imx8mm mipi reset Date: Fri, 5 Nov 2021 08:42:24 -0500 Message-Id: <20211105134228.731331-1-aford173@gmail.com> X-Mailer: git-send-email 2.32.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211105_064254_254986_4C072CC7 X-CRM114-Status: GOOD ( 12.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Most of the blk-ctrl reset bits are found in one register, however there are two bits in offset 8 for pulling the MIPI DPHY out of reset and these need to be set when IMX8MM_DISPBLK_PD_MIPI_CSI is brought out of reset or the MIPI_CSI hangs. Fixes: 926e57c065df ("soc: imx: imx8m-blk-ctrl: add DISP blk-ctrl") Signed-off-by: Adam Ford --- drivers/soc/imx/imx8m-blk-ctrl.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/soc/imx/imx8m-blk-ctrl.c b/drivers/soc/imx/imx8m-blk-ctrl.c index 519b3651d1d9..5506bd075c35 100644 --- a/drivers/soc/imx/imx8m-blk-ctrl.c +++ b/drivers/soc/imx/imx8m-blk-ctrl.c @@ -17,6 +17,7 @@ #define BLK_SFT_RSTN 0x0 #define BLK_CLK_EN 0x4 +#define BLK_MIPI_RESET_DIV 0x8 struct imx8m_blk_ctrl_domain; @@ -36,6 +37,7 @@ struct imx8m_blk_ctrl_domain_data { const char *gpc_name; u32 rst_mask; u32 clk_mask; + u32 mipi_rst_mask; }; #define DOMAIN_MAX_CLKS 3 @@ -78,6 +80,7 @@ static int imx8m_blk_ctrl_power_on(struct generic_pm_domain *genpd) /* put devices into reset */ regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); + regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_rst_mask); /* enable upstream and blk-ctrl clocks to allow reset to propagate */ ret = clk_bulk_prepare_enable(data->num_clks, domain->clks); @@ -99,6 +102,7 @@ static int imx8m_blk_ctrl_power_on(struct generic_pm_domain *genpd) /* release reset */ regmap_set_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); + regmap_set_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_rst_mask); /* disable upstream clocks */ clk_bulk_disable_unprepare(data->num_clks, domain->clks); @@ -122,6 +126,7 @@ static int imx8m_blk_ctrl_power_off(struct generic_pm_domain *genpd) /* put devices into reset and disable clocks */ regmap_clear_bits(bc->regmap, BLK_SFT_RSTN, data->rst_mask); regmap_clear_bits(bc->regmap, BLK_CLK_EN, data->clk_mask); + regmap_clear_bits(bc->regmap, BLK_MIPI_RESET_DIV, data->mipi_rst_mask); /* power down upstream GPC domain */ pm_runtime_put(domain->power_dev); @@ -488,6 +493,7 @@ static const struct imx8m_blk_ctrl_domain_data imx8mm_disp_blk_ctl_domain_data[] .gpc_name = "mipi-csi", .rst_mask = BIT(3) | BIT(4), .clk_mask = BIT(10) | BIT(11), + .mipi_rst_mask = BIT(16) | BIT(17), }, };