static void csi2_isr_ctx(struct isp_csi2_device *csi2,
struct isp_csi2_ctx_cfg *ctx)
{
struct isp_device *isp = csi2->isp;
unsigned int n = ctx->ctxnum;
u32 status;
status = isp_reg_readl(isp, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
isp_reg_writel(isp, status, csi2->regs1, ISPCSI2_CTX_IRQSTATUS(n));
/* Propagate frame number */
if (status & ISPCSI2_CTX_IRQSTATUS_FS_IRQ) {
struct isp_pipeline *pipe =
to_isp_pipeline(&csi2->subdev.entity);
if (pipe->do_propagation)
atomic_inc(&pipe->frame_number);
}
if (!(status & ISPCSI2_CTX_IRQSTATUS_FE_IRQ))
return;
/* Skip interrupts until we reach the frame skip count. The CSI2 will be
* automatically disabled, as the frame skip count has been programmed
* in the CSI2_CTx_CTRL1::COUNT field, so reenable it.
*
* It would have been nice to rely on the FRAME_NUMBER interrupt instead
* but it turned out that the interrupt is only generated when the CSI2
* writes to memory (the CSI2_CTx_CTRL1::COUNT field is decreased
* correctly and reaches 0 when data is forwarded to the video port only
* but no interrupt arrives). Maybe a CSI2 hardware bug.
*/
if (csi2->frame_skip) {
csi2->frame_skip--;
if (csi2->frame_skip == 0) {
ctx->format_id = csi2_ctx_map_format(csi2);
csi2_ctx_config(isp, csi2, ctx);
csi2_ctx_enable(isp, csi2, n, 1);
}
return;
}
if (csi2->output & CSI2_OUTPUT_MEMORY)
csi2_isr_buffer(csi2);
}
static int csi2_configure(struct isp_csi2_device *csi2)
{
const struct isp_v4l2_subdevs_group *pdata;
struct isp_device *isp = csi2->isp;
struct isp_csi2_timing_cfg *timing = &csi2->timing[0];
struct v4l2_subdev *sensor;
struct media_pad *pad;
/*
* CSI2 fields that can be updated while the context has
* been enabled or the interface has been enabled are not
* updated dynamically currently. So we do not allow to
* reconfigure if either has been enabled
*/
if (csi2->contexts[0].enabled || csi2->ctrl.if_enable)
return -EBUSY;
pad = media_entity_remote_pad(&csi2->pads[CSI2_PAD_SINK]);
sensor = media_entity_to_v4l2_subdev(pad->entity);
pdata = sensor->host_priv;
csi2->frame_skip = 0;
v4l2_subdev_call(sensor, sensor, g_skip_frames, &csi2->frame_skip);
csi2->ctrl.vp_out_ctrl = pdata->bus.csi2.vpclk_div;
csi2->ctrl.frame_mode = ISP_CSI2_FRAME_IMMEDIATE;
csi2->ctrl.ecc_enable = pdata->bus.csi2.crc;
timing->ionum = 1;
timing->force_rx_mode = 1;
timing->stop_state_16x = 1;
timing->stop_state_4x = 1;
timing->stop_state_counter = 0x1FF;
/*
* The CSI2 receiver can't do any format conversion except DPCM
* decompression, so every set_format call configures both pads
* and enables DPCM decompression as a special case:
*/
if (csi2->formats[CSI2_PAD_SINK].code !=
csi2->formats[CSI2_PAD_SOURCE].code)
csi2->dpcm_decompress = true;
else
csi2->dpcm_decompress = false;
csi2->contexts[0].format_id = csi2_ctx_map_format(csi2);
if (csi2->video_out.bpl_padding == 0)
csi2->contexts[0].data_offset = 0;
else
csi2->contexts[0].data_offset = csi2->video_out.bpl_value;
/*
* Enable end of frame and end of line signals generation for
* context 0. These signals are generated from CSI2 receiver to
* qualify the last pixel of a frame and the last pixel of a line.
* Without enabling the signals CSI2 receiver writes data to memory
* beyond buffer size and/or data line offset is not handled correctly.
*/
csi2->contexts[0].eof_enabled = 1;
csi2->contexts[0].eol_enabled = 1;
csi2_irq_complexio1_set(isp, csi2, 1);
csi2_irq_ctx_set(isp, csi2, 1);
csi2_irq_status_set(isp, csi2, 1);
/* Set configuration (timings, format and links) */
csi2_timing_config(isp, csi2, timing);
csi2_recv_config(isp, csi2, &csi2->ctrl);
csi2_ctx_config(isp, csi2, &csi2->contexts[0]);
return 0;
}
