Hi Mats, Am Dienstag, den 17.02.2015, 16:53 +0100 schrieb Mats Randgaard (matrandg): > > I think this calculation should include the blanking intervals. > > As far as I understand is only the active video from the HDMI interface > transferred on the CSI interface, so I think this calculation is > correct. We transfer 1080p60 video on four lanes with 823.5 Mbps/lane, > which would not have been possible if the blanking should have been > transferred as well ((2200 * 1125 * 60 * 24) bps / 823.5 Mbps/lane = > 4.33 lanes.
You are right, I confused the "reference" and "minimum" suitable CSI lane speed fields in REF_02. There ought to be _some_ overhead though? (1920 * 1080 * 60 * 24) bps = 746.496 Mbps, but REF_02 suggests a minimum of 820.92 Mbps per lane (reference is 891 Mbps as expected). [...] > >> + i2c_wr32(sd, HSTXVREGEN, > >> + ((lanes > 0) ? MASK_CLM_HSTXVREGEN : 0x0) | > >> + ((lanes > 0) ? MASK_D0M_HSTXVREGEN : 0x0) | > >> + ((lanes > 1) ? MASK_D1M_HSTXVREGEN : 0x0) | > >> + ((lanes > 2) ? MASK_D2M_HSTXVREGEN : 0x0) | > >> + ((lanes > 3) ? MASK_D3M_HSTXVREGEN : 0x0)); > >> + > >> + i2c_wr32(sd, TXOPTIONCNTRL, MASK_CONTCLKMODE); > > Since anything below can't be undone without pulling CTXRST, I propose > > to split tc358743_set_csi into tc358743_set_csi (above) and > > tc358743_start_csi (below). > > > > To make this driver work with the Synopsys DesignWare MIPI CSI-2 Host > > Controller, there needs to be a time when the lanes are in stop state > > first, so the host can synchronize. I'd then like to call start_csi in > > s_stream only. > > With help from Toshiba we have now implemented start and stop of the CSI > interface without pulling CTXRST. You can see our solution in the next > RFC, and I would appreciate if you could test if that works fine for you > as well! I'm looking forward to it. regards Philipp -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
