2009/7/27 Aguirre Rodriguez, Sergio Alberto <saaguirre@xxxxxx>: > Matthias, > > Please avoid top-posting, because its prohibited by the mailing list rules. I'm readjusting it for you below Oh, i am sorry about that, it is not going to happen again, promise. And thank you for readjusting. > > From: matthias schwarz [mailto:matthias.schw@xxxxxxxxxxxxxx] >> 2009/7/27 matthias schwarz <matthias.schw@xxxxxxxxxxxxxx>: >> > 2009/7/27 Aguirre Rodriguez, Sergio Alberto <saaguirre@xxxxxx>: >> >> (rearranging mail to avoid top posting..) >> >> >> >> From: matthias schwarz [mailto:matthias.schw@xxxxxxxxxxxxxx] >> >>> 2009/7/27 Aguirre Rodriguez, Sergio Alberto <saaguirre@xxxxxx>: >> >>> > >> >>> > >> >>> >> -----Original Message----- >> >>> >> From: linux-omap-owner@xxxxxxxxxxxxxxx [mailto:linux-omap- >> >>> >> owner@xxxxxxxxxxxxxxx] On Behalf Of matthias schwarz >> >>> >> Sent: Monday, July 27, 2009 7:47 AM >> >>> >> To: linux-omap@xxxxxxxxxxxxxxx >> >>> >> Subject: Camera Interface VS/HS Issue >> >>> >> >> >>> >> Hi there, >> >>> >> >> >>> >> i just recently ran into a problem when trying to let the ISP >> >>> >> (OMAP3530) generate HS/VS signals in SYNC mode. >> >>> >> I am building a module to do so. >> >>> >> >> >>> >> It basically enables the three clocks (cam_ick, cam_mclk and >> >>> >> csi2_96m_fck), >> >>> >> then sets >> >>> >> >> >>> >> ISPCCDC_PIX_LINES_PPLN >> >>> >> ISPCCDC_PIX_LINES_HLPRF >> >>> >> ISPCCDC_HD_VD_WID_VDW >> >>> >> ISPCCDC_HD_VD_WID_HDW >> >>> >> ISPCCDC_SYN_MODE_VDHDEN >> >>> >> ISPCCDC_SYN_MODE_VDHDOUT >> >>> >> ISPCCDC_CFG_VDLC >> >>> >> ISPTCTRL_CTRL_DIVA >> >>> >> ISPTCTRL_CTRL_DIVB >> >>> >> ISPCCDC_PCR >> >>> >> >> >>> >> via some calls to ioremap and ioread32/iowrite32. >> >>> >> My question now is the following: >> >>> >> when i hook an oscilloscope to the corresponding pins (CAM_VS, >> CAM_HS, >> >>> >> CAM_XCLKA) i can see that only the CAM_XCLKA is working correctly, >> >>> >> also at the configured frequency. >> >>> >> Both, CAM_VS and CAM_HS remain at low voltage all the time, even >> when >> >>> >> i switch their polarities (ISPCCDC_SYN_MODE_VDPOL, >> >>> >> ISPCCDC_SYN_MODE_HDPOL) that behavior does not change and signals >> >>> >> always remain at low voltage. >> >>> >> >> >>> >> Could someone help me out, or give me a hint what i might be >> missing >> >>> >> to generate those output signals correctly? >> >>> > >> >>> > Matthias, >> >>> > >> >>> > Can you please provide a register dump of the above values? >> >>> > >> >>> > Looks like you're touching the adequate registers though... But I >> can >> >>> help you more looking at the values. >> >>> > >> >>> Sure i can, >> >>> register values are the following: >> >>> >> >>> ccdc_pix_lines: 0x050005a0 >> >>> >> >>> ccdc_hd_vd_wid: 0x00320064 >> >>> >> >>> ccdc_syn_mode: 0x00050c0c >> >> >> >> This is wrong, because: >> >> >> >> Bit0 sets directions of cam_hs and cam_vs signals with this values: >> >> - 0: Input (what you're setting with that values) >> >> - 1: Output (Is this what you want?) >> >> >> >> Bit1 Sets direction of cam_fld pin, which follows the same logic as the >> Bit0. >> >> >> >> Others could be wrong or bad, depending on your exact usecase and >> config intention. >> >> >> >> Hope this helps. >> >> >> > Hmm, >> > so now i have: >> > >> > ccdc_syn_mode: 0x00050c0f >> > >> > but that does not change the behavior i am experiencing, both pins >> > (CAM_VS, CAM_HS) remain at low voltage at all times. >> > >> > I don't have to do anything but enabling the corresponding clocks to >> > make sure the CCDC is working? >> I also set, >> >> ISPCTRL_CCDC_CLK_EN >> ISPCTRL_CCDC_RAM_EN >> >> but those also won't change the always low voltage pins. > > Are you having a valid Pixel clock input to the CCDC? Actually, i did not check that. And that signal also is not provided. Just to confirm: pixelclock refers to the clocking signal coming back from the sensor? > > I just confirmed with our internal TI HW support, and you need a valid pixel input clock to assert/deassert the signals. So it is an issue with the sensor itself, Thank you very much, Matthias > > Regards, > Sergio >> > >> > Thank you, >> > Matthias >> >> Regards, >> >> Sergio >> >>> >> >>> ccdc_cfg: 0x00008000 >> >>> >> >>> tctrl_ctrl_cfg: 0x80000463 >> >>> >> >>> ccdc_pcr: 0x00000001 >> >>> >> >>> Thank you, >> >>> Matthias >> >>> > Regards, >> >>> > Sergio >> >>> >> >> >>> >> Thank you very much, >> >>> >> Matthias >> >>> >> -- >> >>> >> To unsubscribe from this list: send the line "unsubscribe linux- >> omap" >> >>> in >> >>> >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> >>> >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >>> > >> >>> > >> >> >> >> >> > > > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
