On 12/13/18 4:59 AM, Philipp Zabel wrote:
Hi Steve, On Tue, 2018-10-16 at 17:00 -0700, Steve Longerbeam wrote:The function ipu_csi_init_interface() was inverting the F-bit for NTSC case, in the CCIR_CODE_1/2 registers. The result being that for NTSC bottom-top field order, the CSI would swap fields and capture in top-bottom order. Instead, base field swap on the field order of the input to the CSI, and the field order of the requested output. If the input/output fields are sequential but different, swap fields, otherwise do not swap. This requires passing both the input and output mbus frame formats to ipu_csi_init_interface(). Move this code to a new private function ipu_csi_set_bt_interlaced_codes() that programs the CCIR_CODE_1/2 registers for interlaced BT.656 (and possibly interlaced BT.1120 in the future). When detecting input video standard from the input frame width/height, make sure to double height if input field type is alternate, since in that case input height only includes lines for one field. Signed-off-by: Steve Longerbeam <slongerbeam@xxxxxxxxx> --- Changes since v4: - Cleaned up some convoluted code in ipu_csi_init_interface(), suggested by Philipp Zabel. - Fixed a regression in csi_setup(), caught by Philipp. --- drivers/gpu/ipu-v3/ipu-csi.c | 119 +++++++++++++++------- drivers/staging/media/imx/imx-media-csi.c | 17 +--- include/video/imx-ipu-v3.h | 3 +- 3 files changed, 88 insertions(+), 51 deletions(-) diff --git a/drivers/gpu/ipu-v3/ipu-csi.c b/drivers/gpu/ipu-v3/ipu-csi.c index aa0e30a2ba18..4a15e513fa05 100644 --- a/drivers/gpu/ipu-v3/ipu-csi.c +++ b/drivers/gpu/ipu-v3/ipu-csi.c @@ -325,6 +325,15 @@ static int mbus_code_to_bus_cfg(struct ipu_csi_bus_config *cfg, u32 mbus_code, return 0; }+/* translate alternate field mode based on given standard */+static inline enum v4l2_field +ipu_csi_translate_field(enum v4l2_field field, v4l2_std_id std) +{ + return (field != V4L2_FIELD_ALTERNATE) ? field : + ((std & V4L2_STD_525_60) ? + V4L2_FIELD_SEQ_BT : V4L2_FIELD_SEQ_TB); +} + /* * Fill a CSI bus config struct from mbus_config and mbus_framefmt. */ @@ -374,22 +383,75 @@ static int fill_csi_bus_cfg(struct ipu_csi_bus_config *csicfg, return 0; }+static int ipu_csi_set_bt_interlaced_codes(struct ipu_csi *csi,+ struct v4l2_mbus_framefmt *infmt, + struct v4l2_mbus_framefmt *outfmt,infmt and outfmt parameters could be const.
Agreed, I will convert these pointer args to const. And since we are changing the API to ipu_csi_init_interface() anyway, I went ahead and converted the mbus_cfg, infmt, and outfmt pointer args to const there as well.
+ v4l2_std_id std) +{ + enum v4l2_field infield, outfield; + bool swap_fields; + + /* get translated field type of input and output */ + infield = ipu_csi_translate_field(infmt->field, std); + outfield = ipu_csi_translate_field(outfmt->field, std); + + /* + * Write the H-V-F codes the CSI will match against the + * incoming data for start/end of active and blanking + * field intervals. If input and output field types are + * sequential but not the same (one is SEQ_BT and the other + * is SEQ_TB), swap the F-bit so that the CSI will capture + * field 1 lines before field 0 lines. + */ + swap_fields = (V4L2_FIELD_IS_SEQUENTIAL(infield) && + V4L2_FIELD_IS_SEQUENTIAL(outfield) && + infield != outfield); + + if (!swap_fields) { + /* + * Field0BlankEnd = 110, Field0BlankStart = 010 + * Field0ActiveEnd = 100, Field0ActiveStart = 000 + * Field1BlankEnd = 111, Field1BlankStart = 011 + * Field1ActiveEnd = 101, Field1ActiveStart = 001 + */ + ipu_csi_write(csi, 0x40596 | CSI_CCIR_ERR_DET_EN, + CSI_CCIR_CODE_1); + ipu_csi_write(csi, 0xD07DF, CSI_CCIR_CODE_2); + } else { + dev_dbg(csi->ipu->dev, "capture field swap\n"); + + /* same as above but with F-bit inverted */ + ipu_csi_write(csi, 0xD07DF | CSI_CCIR_ERR_DET_EN, + CSI_CCIR_CODE_1); + ipu_csi_write(csi, 0x40596, CSI_CCIR_CODE_2); + } + + ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3); + + return 0; +} + + int ipu_csi_init_interface(struct ipu_csi *csi, struct v4l2_mbus_config *mbus_cfg, - struct v4l2_mbus_framefmt *mbus_fmt) + struct v4l2_mbus_framefmt *infmt, + struct v4l2_mbus_framefmt *outfmt) { struct ipu_csi_bus_config cfg; unsigned long flags; u32 width, height, data = 0; + v4l2_std_id std; int ret;- ret = fill_csi_bus_cfg(&cfg, mbus_cfg, mbus_fmt);+ ret = fill_csi_bus_cfg(&cfg, mbus_cfg, infmt); if (ret < 0) return ret;/* set default sensor frame width and height */- width = mbus_fmt->width; - height = mbus_fmt->height; + width = infmt->width; + height = infmt->height; + if (infmt->field == V4L2_FIELD_ALTERNATE) + height *= 2;/* Set the CSI_SENS_CONF register remaining fields */data |= cfg.data_width << CSI_SENS_CONF_DATA_WIDTH_SHIFT | @@ -416,42 +478,22 @@ int ipu_csi_init_interface(struct ipu_csi *csi, ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3); break; case IPU_CSI_CLK_MODE_CCIR656_INTERLACED: - if (mbus_fmt->width == 720 && mbus_fmt->height == 576) { - /* - * PAL case - * - * Field0BlankEnd = 0x6, Field0BlankStart = 0x2, - * Field0ActiveEnd = 0x4, Field0ActiveStart = 0 - * Field1BlankEnd = 0x7, Field1BlankStart = 0x3, - * Field1ActiveEnd = 0x5, Field1ActiveStart = 0x1 - */ - height = 625; /* framelines for PAL */ - - ipu_csi_write(csi, 0x40596 | CSI_CCIR_ERR_DET_EN, - CSI_CCIR_CODE_1); - ipu_csi_write(csi, 0xD07DF, CSI_CCIR_CODE_2); - ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3); - } else if (mbus_fmt->width == 720 && mbus_fmt->height == 480) { - /* - * NTSC case - * - * Field0BlankEnd = 0x7, Field0BlankStart = 0x3, - * Field0ActiveEnd = 0x5, Field0ActiveStart = 0x1 - * Field1BlankEnd = 0x6, Field1BlankStart = 0x2, - * Field1ActiveEnd = 0x4, Field1ActiveStart = 0 - */ - height = 525; /* framelines for NTSC */ - - ipu_csi_write(csi, 0xD07DF | CSI_CCIR_ERR_DET_EN, - CSI_CCIR_CODE_1); - ipu_csi_write(csi, 0x40596, CSI_CCIR_CODE_2); - ipu_csi_write(csi, 0xFF0000, CSI_CCIR_CODE_3); + if (width == 720 && height == 480) { + std = V4L2_STD_NTSC; + height = 525; + } else if (width == 720 && height == 576) { + std = V4L2_STD_PAL; + height = 625; } else { dev_err(csi->ipu->dev, - "Unsupported CCIR656 interlaced video mode\n"); - spin_unlock_irqrestore(&csi->lock, flags); - return -EINVAL; + "Unsupported interlaced video mode\n"); + ret = -EINVAL; + goto out_unlock; } + + ret = ipu_csi_set_bt_interlaced_codes(csi, infmt, outfmt, std); + if (ret) + goto out_unlock; break; case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_DDR: case IPU_CSI_CLK_MODE_CCIR1120_PROGRESSIVE_SDR: @@ -476,9 +518,10 @@ int ipu_csi_init_interface(struct ipu_csi *csi, dev_dbg(csi->ipu->dev, "CSI_ACT_FRM_SIZE = 0x%08X\n", ipu_csi_read(csi, CSI_ACT_FRM_SIZE));+out_unlock:spin_unlock_irqrestore(&csi->lock, flags);- return 0;+ return ret; } EXPORT_SYMBOL_GPL(ipu_csi_init_interface);diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.cindex 4223f8d418ae..7ecbd4d76d09 100644 --- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -663,15 +663,14 @@ static void csi_idmac_stop(struct csi_priv *priv) /* Update the CSI whole sensor and active windows */ static int csi_setup(struct csi_priv *priv) { - struct v4l2_mbus_framefmt *infmt, *outfmt; + struct v4l2_mbus_framefmt infmt, outfmt; const struct imx_media_pixfmt *incc; struct v4l2_mbus_config mbus_cfg; - struct v4l2_mbus_framefmt if_fmt; struct v4l2_rect crop;- infmt = &priv->format_mbus[CSI_SINK_PAD];+ infmt = priv->format_mbus[CSI_SINK_PAD];Maybe still call this if_fmt, or maybe csi_fmt, to indicate this is not just the userspace visible input format as determined by the pad, but the modified format we set the interface to? Not a strong preference, though.
Ok, I brought back if_fmt.
incc = priv->cc[CSI_SINK_PAD]; - outfmt = &priv->format_mbus[priv->active_output_pad]; + outfmt = priv->format_mbus[priv->active_output_pad];Copying the output format onto the stack seems unnecessary to me.
Yes, I did this for consistency with on-stack infmt, but it's not necessary, I restored outfmt to a pointer.
/* compose mbus_config from the upstream endpoint */mbus_cfg.type = priv->upstream_ep.bus_type; @@ -679,12 +678,6 @@ static int csi_setup(struct csi_priv *priv) priv->upstream_ep.bus.parallel.flags : priv->upstream_ep.bus.mipi_csi2.flags;- /*- * we need to pass input frame to CSI interface, but - * with translated field type from output format - */ - if_fmt = *infmt; - if_fmt.field = outfmt->field; crop = priv->crop;/*@@ -692,7 +685,7 @@ static int csi_setup(struct csi_priv *priv) * generic/bayer data */ if (is_parallel_bus(&priv->upstream_ep) && incc->cycles) { - if_fmt.width *= incc->cycles; + infmt.width *= incc->cycles; crop.width *= incc->cycles; }@@ -702,7 +695,7 @@ static int csi_setup(struct csi_priv *priv)priv->crop.width == 2 * priv->compose.width, priv->crop.height == 2 * priv->compose.height);- ipu_csi_init_interface(priv->csi, &mbus_cfg, &if_fmt);+ ipu_csi_init_interface(priv->csi, &mbus_cfg, &infmt, &outfmt);We can just pass the &priv->format_mbus[priv->active_output_pad] here, or keep using struct v4l2_mbus_framefmt *outfmt as a shorthand.
I just kept it as a short-hand. Steve
ipu_csi_set_dest(priv->csi, priv->dest); diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.hindex abbad94e14a1..f44a35192313 100644 --- a/include/video/imx-ipu-v3.h +++ b/include/video/imx-ipu-v3.h @@ -352,7 +352,8 @@ int ipu_prg_channel_configure(struct ipuv3_channel *ipu_chan, struct ipu_csi; int ipu_csi_init_interface(struct ipu_csi *csi, struct v4l2_mbus_config *mbus_cfg, - struct v4l2_mbus_framefmt *mbus_fmt); + struct v4l2_mbus_framefmt *infmt, + struct v4l2_mbus_framefmt *outfmt); bool ipu_csi_is_interlaced(struct ipu_csi *csi); void ipu_csi_get_window(struct ipu_csi *csi, struct v4l2_rect *w); void ipu_csi_set_window(struct ipu_csi *csi, struct v4l2_rect *w);Either way, Reviewed-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> regards Philipp
