diff options
Diffstat (limited to 'drivers/media/platform/omap3isp/ispccdc.c')
| -rw-r--r-- | drivers/media/platform/omap3isp/ispccdc.c | 94 |
1 files changed, 78 insertions, 16 deletions
diff --git a/drivers/media/platform/omap3isp/ispccdc.c b/drivers/media/platform/omap3isp/ispccdc.c index 8d1861d948d0..150bbf070bf2 100644 --- a/drivers/media/platform/omap3isp/ispccdc.c +++ b/drivers/media/platform/omap3isp/ispccdc.c @@ -970,10 +970,16 @@ static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, if (format->code == V4L2_MBUS_FMT_YUYV8_2X8 || format->code == V4L2_MBUS_FMT_UYVY8_2X8) { - /* The bridge is enabled for YUV8 formats. Configure the input - * mode accordingly. + /* According to the OMAP3 TRM the input mode only affects SYNC + * mode, enabling BT.656 mode should take precedence. However, + * in practice setting the input mode to YCbCr data on 8 bits + * seems to be required in BT.656 mode. In SYNC mode set it to + * YCbCr on 16 bits as the bridge is enabled in that case. */ - syn_mode |= ISPCCDC_SYN_MODE_INPMOD_YCBCR16; + if (ccdc->bt656) + syn_mode |= ISPCCDC_SYN_MODE_INPMOD_YCBCR8; + else + syn_mode |= ISPCCDC_SYN_MODE_INPMOD_YCBCR16; } switch (data_size) { @@ -997,7 +1003,10 @@ static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, if (pdata && pdata->hs_pol) syn_mode |= ISPCCDC_SYN_MODE_HDPOL; - if (pdata && pdata->vs_pol) + /* The polarity of the vertical sync signal output by the BT.656 + * decoder is not documented and seems to be active low. + */ + if ((pdata && pdata->vs_pol) || ccdc->bt656) syn_mode |= ISPCCDC_SYN_MODE_VDPOL; if (pdata && pdata->fld_pol) @@ -1015,8 +1024,16 @@ static void ccdc_config_sync_if(struct isp_ccdc_device *ccdc, isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, ISPCCDC_CFG_Y8POS); - isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, - ISPCCDC_REC656IF_R656ON); + /* Enable or disable BT.656 mode, including error correction for the + * synchronization codes. + */ + if (ccdc->bt656) + isp_reg_set(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, + ISPCCDC_REC656IF_R656ON | ISPCCDC_REC656IF_ECCFVH); + else + isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_REC656IF, + ISPCCDC_REC656IF_R656ON | ISPCCDC_REC656IF_ECCFVH); + } /* CCDC formats descriptions */ @@ -1107,20 +1124,32 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) unsigned long flags; unsigned int bridge; unsigned int shift; + unsigned int nph; + unsigned int sph; u32 syn_mode; u32 ccdc_pattern; + ccdc->bt656 = false; + pad = media_entity_remote_pad(&ccdc->pads[CCDC_PAD_SINK]); sensor = media_entity_to_v4l2_subdev(pad->entity); - if (ccdc->input == CCDC_INPUT_PARALLEL) + if (ccdc->input == CCDC_INPUT_PARALLEL) { + struct v4l2_mbus_config cfg; + int ret; + + ret = v4l2_subdev_call(sensor, video, g_mbus_config, &cfg); + if (!ret) + ccdc->bt656 = cfg.type == V4L2_MBUS_BT656; + pdata = &((struct isp_v4l2_subdevs_group *)sensor->host_priv) ->bus.parallel; + } /* CCDC_PAD_SINK */ format = &ccdc->formats[CCDC_PAD_SINK]; /* Compute the lane shifter shift value and enable the bridge when the - * input format is YUV. + * input format is a non-BT.656 YUV variant. */ fmt_src.pad = pad->index; fmt_src.which = V4L2_SUBDEV_FORMAT_ACTIVE; @@ -1133,7 +1162,9 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) depth_out = fmt_info->width; shift = depth_in - depth_out; - if (fmt_info->code == V4L2_MBUS_FMT_YUYV8_2X8) + if (ccdc->bt656) + bridge = ISPCTRL_PAR_BRIDGE_DISABLE; + else if (fmt_info->code == V4L2_MBUS_FMT_YUYV8_2X8) bridge = ISPCTRL_PAR_BRIDGE_LENDIAN; else if (fmt_info->code == V4L2_MBUS_FMT_UYVY8_2X8) bridge = ISPCTRL_PAR_BRIDGE_BENDIAN; @@ -1194,10 +1225,24 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) format = &ccdc->formats[CCDC_PAD_SOURCE_OF]; crop = &ccdc->crop; - isp_reg_writel(isp, (crop->left << ISPCCDC_HORZ_INFO_SPH_SHIFT) | - ((crop->width - 1) << ISPCCDC_HORZ_INFO_NPH_SHIFT), + /* The horizontal coordinates are expressed in pixel clock cycles. We + * need two cycles per pixel in BT.656 mode, and one cycle per pixel in + * SYNC mode regardless of the format as the bridge is enabled for YUV + * formats in that case. + */ + if (ccdc->bt656) { + sph = crop->left * 2; + nph = crop->width * 2 - 1; + } else { + sph = crop->left; + nph = crop->width - 1; + } + + isp_reg_writel(isp, (sph << ISPCCDC_HORZ_INFO_SPH_SHIFT) | + (nph << ISPCCDC_HORZ_INFO_NPH_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_HORZ_INFO); - isp_reg_writel(isp, crop->top << ISPCCDC_VERT_START_SLV0_SHIFT, + isp_reg_writel(isp, (crop->top << ISPCCDC_VERT_START_SLV0_SHIFT) | + (crop->top << ISPCCDC_VERT_START_SLV1_SHIFT), OMAP3_ISP_IOMEM_CCDC, ISPCCDC_VERT_START); isp_reg_writel(isp, (crop->height - 1) << ISPCCDC_VERT_LINES_NLV_SHIFT, @@ -1225,8 +1270,11 @@ static void ccdc_configure(struct isp_ccdc_device *ccdc) isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCDC, ISPCCDC_CFG, ISPCCDC_CFG_BSWD); - /* Use PACK8 mode for 1byte per pixel formats. */ - if (omap3isp_video_format_info(format->code)->width <= 8) + /* Use PACK8 mode for 1byte per pixel formats. Check for BT.656 mode + * explicitly as the driver reports 1X16 instead of 2X8 at the OF pad + * for simplicity. + */ + if (omap3isp_video_format_info(format->code)->width <= 8 || ccdc->bt656) syn_mode |= ISPCCDC_SYN_MODE_PACK8; else syn_mode &= ~ISPCCDC_SYN_MODE_PACK8; @@ -1598,6 +1646,16 @@ static void ccdc_vd1_isr(struct isp_ccdc_device *ccdc) { unsigned long flags; + /* In BT.656 mode the CCDC doesn't generate an HS/VS interrupt. We thus + * need to increment the frame counter here. + */ + if (ccdc->bt656) { + struct isp_pipeline *pipe = + to_isp_pipeline(&ccdc->subdev.entity); + + atomic_inc(&pipe->frame_number); + } + spin_lock_irqsave(&ccdc->lsc.req_lock, flags); /* @@ -1885,8 +1943,12 @@ ccdc_try_format(struct isp_ccdc_device *ccdc, struct v4l2_subdev_fh *fh, field = fmt->field; *fmt = *__ccdc_get_format(ccdc, fh, CCDC_PAD_SINK, which); - /* YUV formats are converted from 2X8 to 1X16 by the bridge and - * can be byte-swapped. + /* In SYNC mode the bridge converts YUV formats from 2X8 to + * 1X16. In BT.656 no such conversion occurs. As we don't know + * at this point whether the source will use SYNC or BT.656 mode + * let's pretend the conversion always occurs. The CCDC will be + * configured to pack bytes in BT.656, hiding the inaccuracy. + * In all cases bytes can be swapped. */ if (fmt->code == V4L2_MBUS_FMT_YUYV8_2X8 || fmt->code == V4L2_MBUS_FMT_UYVY8_2X8) { |