> -----Original Message----- > From: matthias schwarz [mailto:matthias.schw@xxxxxxxxxxxxxx] > Sent: Monday, July 27, 2009 11:12 AM > To: Aguirre Rodriguez, Sergio Alberto > Cc: linux-omap@xxxxxxxxxxxxxxx > Subject: Re: Camera Interface VS/HS Issue > > 2009/7/27 Aguirre Rodriguez, Sergio Alberto <saaguirre@xxxxxx>: > > > > > >> -----Original Message----- > >> From: matthias schwarz [mailto:matthias.schw@xxxxxxxxxxxxxx] > >> Sent: Monday, July 27, 2009 10:59 AM > >> To: Aguirre Rodriguez, Sergio Alberto > >> Cc: linux-omap@xxxxxxxxxxxxxxx > >> Subject: Re: Camera Interface VS/HS Issue > >> > >> 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. > > > > Anytime :) > >> > >> > > >> > 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? > > > > Yeah, you normally provide the XCLK to the sensor, and the sensor > responds with a PCLK (Pixelclock) to make the ISP aware on when to latch > the values coming from the port, and increase the counters for the timing > generator to generate HS/VS in your case. > > I know its dirty, but since the sensor won't give me a pixelclock > without fiddling with its config, i just connected XCLK to PCLK (which > should provide a PCLK to CCDC then). > What i experience now is still the same issue, meaning low voltage on > both CAM_VS and CAM_HS... Hmm, I'm sorry, but I'm a bit confused on what are you trying to do exactly... Is it possible to elaborate on your usecase publicly? Regards, Sergio > > >> > >> > > >> > 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, > > > > Looks like... > > > >> 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
