Am Montag, dem 22.11.2021 um 08:27 +0100 schrieb Martin Kepplinger: > Modeled after the NXP driver mx6s_capture.c that this driver is based > on, > imx8mq needs different settings for the baseaddr_switch mechanism. > Define > the needed bits and set that for imx8mq. > > Without these settings, the system will "sometimes" hang completely > when > starting to stream (the interrupt will never be called). > > Signed-off-by: Martin Kepplinger <martin.kepplinger@xxxxxxx> > Acked-by: Rui Miguel Silva <rmfrfs@xxxxxxxxx> > --- > > revision history > ---------------- > v3: > * fix compiler warning when assigning a 64 bit (void *) to an int > * add Ruis' Acked-by tag > > v2: (thank you Rui and Laurent) > * rename function and enum > * remove unrealted newline > * add Laurents reviewed tag to the bindings patch > https://lore.kernel.org/linux-media/20211118063347.3370678-1-martin.kepplinger@xxxxxxx/ > > v1: > https://lore.kernel.org/linux-media/20211117092710.3084034-1-martin.kepplinger@xxxxxxx/T/#t > > > > drivers/staging/media/imx/imx7-media-csi.c | 32 > ++++++++++++++++++++-- > 1 file changed, 30 insertions(+), 2 deletions(-) > > diff --git a/drivers/staging/media/imx/imx7-media-csi.c > b/drivers/staging/media/imx/imx7-media-csi.c > index 2288dadb2683..32311fc0e2a4 100644 > --- a/drivers/staging/media/imx/imx7-media-csi.c > +++ b/drivers/staging/media/imx/imx7-media-csi.c > @@ -12,6 +12,7 @@ > #include <linux/interrupt.h> > #include <linux/mfd/syscon.h> > #include <linux/module.h> > +#include <linux/of_device.h> > #include <linux/of_graph.h> > #include <linux/pinctrl/consumer.h> > #include <linux/platform_device.h> > @@ -122,6 +123,10 @@ > #define BIT_DATA_FROM_MIPI BIT(22) > #define BIT_MIPI_YU_SWAP BIT(21) > #define BIT_MIPI_DOUBLE_CMPNT BIT(20) > +#define BIT_MASK_OPTION_FIRST_FRAME (0 << 18) > +#define BIT_MASK_OPTION_CSI_EN (1 << 18) > +#define BIT_MASK_OPTION_SECOND_FRAME (2 << 18) > +#define BIT_MASK_OPTION_ON_DATA (3 << 18) > #define BIT_BASEADDR_CHG_ERR_EN BIT(9) > #define BIT_BASEADDR_SWITCH_SEL BIT(5) > #define BIT_BASEADDR_SWITCH_EN BIT(4) > @@ -154,6 +159,11 @@ > #define CSI_CSICR18 0x48 > #define CSI_CSICR19 0x4c > > +enum imx_csi_model { > + IMX7_CSI_IMX7 = 0, > + IMX7_CSI_IMX8MQ, > +}; > + > struct imx7_csi { > struct device *dev; > struct v4l2_subdev sd; > @@ -189,6 +199,8 @@ struct imx7_csi { > bool is_csi2; > > struct completion last_eof_completion; > + > + enum imx_csi_model model; > }; > > static struct imx7_csi * > @@ -537,6 +549,16 @@ static void imx7_csi_deinit(struct imx7_csi > *csi, > clk_disable_unprepare(csi->mclk); > } > > +static void imx7_csi_baseaddr_switch_on_second_frame(struct imx7_csi > *csi) > +{ > + u32 cr18 = imx7_csi_reg_read(csi, CSI_CSICR18); > + > + cr18 |= BIT_BASEADDR_SWITCH_EN | BIT_BASEADDR_SWITCH_SEL | > + BIT_BASEADDR_CHG_ERR_EN; > + cr18 |= BIT_MASK_OPTION_SECOND_FRAME; > + imx7_csi_reg_write(csi, cr18, CSI_CSICR18); > +} > + > static void imx7_csi_enable(struct imx7_csi *csi) > { > /* Clear the Rx FIFO and reflash the DMA controller. */ > @@ -552,6 +574,9 @@ static void imx7_csi_enable(struct imx7_csi *csi) > /* Enable the RxFIFO DMA and the CSI. */ > imx7_csi_dmareq_rff_enable(csi); > imx7_csi_hw_enable(csi); > + > + if (csi->model == IMX7_CSI_IMX8MQ) > + imx7_csi_baseaddr_switch_on_second_frame(csi); > } > > static void imx7_csi_disable(struct imx7_csi *csi) > @@ -1155,6 +1180,8 @@ static int imx7_csi_probe(struct > platform_device *pdev) > if (IS_ERR(csi->regbase)) > return PTR_ERR(csi->regbase); > > + csi->model = (enum > imx_csi_model)(uintptr_t)of_device_get_match_data(&pdev->dev); > + > spin_lock_init(&csi->irqlock); > mutex_init(&csi->lock); > > @@ -1249,8 +1276,9 @@ static int imx7_csi_remove(struct > platform_device *pdev) > } > > static const struct of_device_id imx7_csi_of_match[] = { > - { .compatible = "fsl,imx7-csi" }, > - { .compatible = "fsl,imx6ul-csi" }, > + { .compatible = "fsl,imx8mq-csi", .data = (void > *)IMX7_CSI_IMX8MQ }, > + { .compatible = "fsl,imx7-csi", .data = (void *)IMX7_CSI_IMX7 > }, > + { .compatible = "fsl,imx6ul-csi", .data = (void > *)IMX7_CSI_IMX7 }, > { }, > }; > MODULE_DEVICE_TABLE(of, imx7_csi_of_match); Laurent et al. Any doubts about this? I run it for a long time now an it fixes the driver on imx8mq. thank you and all the best, martin
