Hi, > -----Original Message----- > From: ext Laurent Pinchart [mailto:laurent.pinchart@xxxxxxxxxxxxxxxx] > Sent: 29. huhtikuuta 2011 12:49 > To: Jokiniemi Kalle (Nokia-SD/Tampere) > Cc: tony@xxxxxxxxxxx; mchebab@xxxxxxxxxxxxx; linux- > omap@xxxxxxxxxxxxxxx; linux-media@xxxxxxxxxxxxxxx > Subject: Re: [PATCH 1/2] OMAP3: ISP: Add regulator control for omap34xx > > Hi Kalle, > > On Friday 29 April 2011 09:11:59 Kalle Jokiniemi wrote: > > The current omap3isp driver is missing regulator handling > > for CSIb complex in omap34xx based devices. This patch > > adds a mechanism for this to the omap3isp driver. > > > > Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@xxxxxxxxx> > > Thanks for the patch. Sent an updated one, comments on what was done below. > > The CSIb pins are multiplexed with the parallel interface cam_d[6:9] signals, > so the driver might need to handle the vdds_csib regulator for the parallel > interface as well. We can leave that out now though, as I'm not sure we'll > ever see a platform that will require that. > > > --- > > drivers/media/video/omap3isp/ispccp2.c | 24 > +++++++++++++++++++++++- > > drivers/media/video/omap3isp/ispccp2.h | 1 + > > 2 files changed, 24 insertions(+), 1 deletions(-) > > > > diff --git a/drivers/media/video/omap3isp/ispccp2.c > > b/drivers/media/video/omap3isp/ispccp2.c index 0e16cab..3b17b0d 100644 > > --- a/drivers/media/video/omap3isp/ispccp2.c > > +++ b/drivers/media/video/omap3isp/ispccp2.c > > @@ -30,6 +30,7 @@ > > #include <linux/module.h> > > #include <linux/mutex.h> > > #include <linux/uaccess.h> > > +#include <linux/regulator/consumer.h> > > > > #include "isp.h" > > #include "ispreg.h" > > @@ -163,6 +164,9 @@ static void ccp2_if_enable(struct isp_ccp2_device > > *ccp2, u8 enable) struct isp_pipeline *pipe = > > to_isp_pipeline(&ccp2->subdev.entity); int i; > > > > + if (enable && ccp2->vdds_csib) > > + regulator_enable(ccp2->vdds_csib); > > + > > /* Enable/Disable all the LCx channels */ > > for (i = 0; i < CCP2_LCx_CHANS_NUM; i++) > > isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, > ISPCCP2_LCx_CTRL(i), > > @@ -186,6 +190,8 @@ static void ccp2_if_enable(struct isp_ccp2_device > > *ccp2, u8 enable) ISPCCP2_LC01_IRQENABLE, > > ISPCCP2_LC01_IRQSTATUS_LC0_FS_IRQ); > > } > > If you resubmit the patch to address the comments below, please add a blank > line here. Done. > > > + if (!enable && ccp2->vdds_csib) > > + regulator_disable(ccp2->vdds_csib); > > } > > > > /* > > @@ -1137,6 +1143,10 @@ error: > > */ > > void omap3isp_ccp2_cleanup(struct isp_device *isp) > > { > > + struct isp_ccp2_device *ccp2 = &isp->isp_ccp2; > > + > > + if (isp->revision == ISP_REVISION_2_0) > > + regulator_put(ccp2->vdds_csib); > > What about testing ccp2->vdds_csib != NULL here like you do above ? Not all > ES2.0 platforms will use a regulator, so you can end up calling > regulator_put(NULL). regulator_put() will return immediately, but the API > doesn't allow it explictly either. > > If regulator_put(NULL) is deemed to be safe, I would remove the revision > check > here. If it isn't, I would replace it with a ccp2->vdds_csib != NULL check. Regulator_put checks for NULL, so it's safe to call always. > > > } > > > > /* > > @@ -1155,10 +1165,22 @@ int omap3isp_ccp2_init(struct isp_device *isp) > > * the CSI2c or CSI2a receivers. The PHY then needs to be explicitly > > * configured. > > * > > + * On the OMAP34xx the CSI1/CCB is operated in the CSIb IO complex, > > CSI1/CCB ? Do you mean CCP ? > > The OMAP34xx has no CCP2 support anyway, so I would s,CSI1/CCB,CSI1 > receiver,. Done. > > > + * which is powered by vdds_csib power rail. Hence the request for > > + * the regulator. > > + * > > * TODO: Don't hardcode the usage of PHY1 (shared with CSI2c). > > */ > > - if (isp->revision == ISP_REVISION_15_0) > > + if (isp->revision == ISP_REVISION_15_0) { > > ccp2->phy = &isp->isp_csiphy1; > > + } else if (isp->revision == ISP_REVISION_2_0) { > > + ccp2->vdds_csib = regulator_get(isp->dev, "vdds_csib"); > > + if (IS_ERR(ccp2->vdds_csib)) { > > + dev_dbg(isp->dev, > > + "Could not get regulator vdds_csib\n"); > > + ccp2->vdds_csib = NULL; > > + } > > + } > > If you resubmit your patch to address the above comments, could you please > reorder the code (and the comment) here and put the ES2.0 check before the > 15.0 ? Done for both the code and comments. - Kalle > > > ret = ccp2_init_entities(ccp2); > > if (ret < 0) > > diff --git a/drivers/media/video/omap3isp/ispccp2.h > > b/drivers/media/video/omap3isp/ispccp2.h index 5505a86..6674e9d 100644 > > --- a/drivers/media/video/omap3isp/ispccp2.h > > +++ b/drivers/media/video/omap3isp/ispccp2.h > > @@ -81,6 +81,7 @@ struct isp_ccp2_device { > > struct isp_interface_mem_config mem_cfg; > > struct isp_video video_in; > > struct isp_csiphy *phy; > > + struct regulator *vdds_csib; > > unsigned int error; > > enum isp_pipeline_stream_state state; > > wait_queue_head_t wait; > > -- > Regards, > > Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
