H Murali,
> -----Original Message-----
> From: Karicheri, Muralidharan
> Sent: Monday, August 17, 2009 9:38 PM
> To: Hiremath, Vaibhav; linux-media@vger.kernel.org
> Cc: davinci-linux-open-sou...@linux.davincidsp.com;
> hverk...@xs4all.nl
> Subject: RE: [PATCH v1 - 4/5] V4L : vpif updates for DM6467 vpif
> capture driver
>
> Vaibhav,
>
> I don't see any serious issues raised here. I can send another patch
> to fix this if needed.
[Hiremath, Vaibhav] yes most of them are editorial, as I mentioned I just
reviewed it quickly.
But as far as static variables are concerned I still think we can avoid them
completely, again it's not critical though.
As I mentioned I will have to look for extern variables, how they have been
used and stuff like that.
As of now, I am ok if it gets merged.
>
> Regards,
> Murali
> >> +#include <linux/spinlock.h>
> >> #include <linux/kernel.h>
> >> +#include <linux/io.h>
> >[Hiremath, Vaibhav] You may want to put one line gap here.
> Ok. Just editorial.
> >> +#include <mach/hardware.h>
> >>
> >> #include "vpif.h"
> >>
> >> @@ -31,6 +35,12 @@ MODULE_LICENSE("GPL");
> >> #define VPIF_CH2_MAX_MODES (15)
> >> #define VPIF_CH3_MAX_MODES (02)
> >>
> >> +static resource_size_t res_len;
> >> +static struct resource *res;
> >[Hiremath, Vaibhav] Do we really require this to be static
> variable?
> >I think we can manage it to be local variable.
> Yes. We could. Probably change it with a new patch. Don't want to
> hold up merge because of this.
> >
> >> +spinlock_t vpif_lock;
> >> +
> >> +void __iomem *vpif_base;
> >> +
> >> static inline void vpif_wr_bit(u32 reg, u32 bit, u32 val)
> >> {
> >> if (val)
> >> @@ -151,17 +161,17 @@ static void config_vpif_params(struct
> >> vpif_params *vpifparams,
> >> else if (config->capture_format) {
> >> /* Set the polarity of various pins */
> >> vpif_wr_bit(reg, VPIF_CH_FID_POLARITY_BIT,
> >> - vpifparams-
> >> >params.raw_params.fid_pol);
> >> + vpifparams->iface.fid_pol);
> >> vpif_wr_bit(reg, VPIF_CH_V_VALID_POLARITY_BIT,
> >> - vpifparams->params.raw_params.vd_pol);
> >> + vpifparams->iface.vd_pol);
> >> vpif_wr_bit(reg, VPIF_CH_H_VALID_POLARITY_BIT,
> >> - vpifparams->params.raw_params.hd_pol);
> >> + vpifparams->iface.hd_pol);
> >>
> >> value = regr(reg);
> >> /* Set data width */
> >> value &= ((~(unsigned int)(0x3)) <<
> >> VPIF_CH_DATA_WIDTH_BIT);
> >> - value |= ((vpifparams->params.raw_params.data_sz)
> >> <<
> >> + value |= ((vpifparams->params.data_sz) <<
> >> VPIF_CH_DATA_WIDTH_BIT);
> >> regw(value, reg);
> >> }
> >> @@ -227,8 +237,60 @@ int vpif_channel_getfid(u8 channel_id)
> >> }
> >> EXPORT_SYMBOL(vpif_channel_getfid);
> >>
> >> -void vpif_base_addr_init(void __iomem *base)
> >> +static int __init vpif_probe(struct platform_device *pdev)
> >> +{
> >> + int status = 0;
> >> +
> >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >> + if (!res)
> >> + return -ENOENT;
> >> +
> >> + res_len = res->end - res->start + 1;
> >> +
> >> + res = request_mem_region(res->start, res_len, res->name);
> >> + if (!res)
> >> + return -EBUSY;
> >> +
> >> + vpif_base = ioremap(res->start, res_len);
> >> + if (!vpif_base) {
> >> + status = -EBUSY;
> >> + goto fail;
> >> + }
> >> +
> >> + spin_lock_init(&vpif_lock);
> >> + dev_info(&pdev->dev, "vpif probe success\n");
> >> + return 0;
> >> +
> >> +fail:
> >> + release_mem_region(res->start, res_len);
> >> + return status;
> >> +}
> >> +
> >> +static int vpif_remove(struct platform_device *pdev)
> >> {
> >> - vpif_base = base;
> >> + iounmap(vpif_base);
> >> + release_mem_region(res->start, res_len);
> >> + return 0;
> >> }
> >> -EXPORT_SYMBOL(vpif_base_addr_init);
> >> +
> >> +static struct platform_driver vpif_driver = {
> >> + .driver = {
> >> + .name = "vpif",
> >> + .owner = THIS_MODULE,
> >> + },
> >> + .remove = __devexit_p(vpif_remove),
> >> + .probe = vpif_probe,
> >> +};
> >> +
> >> +static void vpif_exit(void)
> >> +{
> >> + platform_driver_unregister(&vpif_driver);
> >> +}
> >> +
> >> +static int __init vpif_init(void)
> >> +{
> >> + return platform_driver_register(&vpif_driver);
> >> +}
> >> +subsys_initcall(vpif_init);
> >> +module_exit(vpif_exit);
> >> +
> >> diff --git a/drivers/media/video/davinci/vpif.h
> >> b/drivers/media/video/davinci/vpif.h
> >> index fca26dc..188841b 100644
> >> --- a/drivers/media/video/davinci/vpif.h
> >> +++ b/drivers/media/video/davinci/vpif.h
> >> @@ -19,6 +19,7 @@
> >> #include <linux/io.h>
> >> #include <linux/videodev2.h>
> >[Hiremath, Vaibhav] one line gap here.
> Again editorial.
> >> #include <mach/hardware.h>
> >> +#include <mach/dm646x.h>
> >>
> >> /* Maximum channel allowed */
> >> #define VPIF_NUM_CHANNELS (4)
> >> @@ -26,7 +27,9 @@
> >> #define VPIF_DISPLAY_NUM_CHANNELS (2)
> >>
> >> /* Macros to read/write registers */
> >> -static void __iomem *vpif_base;
> >> +extern void __iomem *vpif_base;
> >> +extern spinlock_t vpif_lock;
> >[Hiremath, Vaibhav] I think I would want to check compete driver.
> How these
> >extern variables have been used.
> >
> Let me know if you find some thing wrong in the driver. At this
> time, I just don't see any issues with this.
> >> +
> >> #define regr(reg) readl((reg) + vpif_base)
> >> #define regw(value, reg) writel(value, (reg + vpif_base))
> >>
> >> @@ -280,6 +283,10 @@ static inline void enable_channel1(int
> enable)
> >> /* inline function to enable interrupt for channel0 */
> >> static inline void channel0_intr_enable(int enable)
> >> {
> >> + unsigned long flags;
> >> +
> >> + spin_lock_irqsave(&vpif_lock, flags);
> >> +
> >> if (enable) {
> >> regw((regr(VPIF_INTEN) | 0x10), VPIF_INTEN);
> >> regw((regr(VPIF_INTEN_SET) | 0x10), VPIF_INTEN_SET);
> >> @@ -292,11 +299,16 @@ static inline void channel0_intr_enable(int
> >> enable)
> >> regw((regr(VPIF_INTEN_SET) | VPIF_INTEN_FRAME_CH0),
> >> VPIF_INTEN_SET);
> >> }
> >> + spin_unlock_irqrestore(&vpif_lock, flags);
> >> }
> >>
> >> /* inline function to enable interrupt for channel1 */
> >> static inline void channel1_intr_enable(int enable)
> >> {
> >> + unsigned long flags;
> >> +
> >> + spin_lock_irqsave(&vpif_lock, flags);
> >> +
> >> if (enable) {
> >> regw((regr(VPIF_INTEN) | 0x10), VPIF_INTEN);
> >> regw((regr(VPIF_INTEN_SET) | 0x10), VPIF_INTEN_SET);
> >> @@ -309,6 +321,7 @@ static inline void channel1_intr_enable(int
> >> enable)
> >> regw((regr(VPIF_INTEN_SET) | VPIF_INTEN_FRAME_CH1),
> >> VPIF_INTEN_SET);
> >> }
> >> + spin_unlock_irqrestore(&vpif_lock, flags);
> >> }
> >>
> >> /* inline function to set buffer addresses in case of Y/C non
> mux
> >> mode */
> >> @@ -431,6 +444,10 @@ static inline void enable_channel3(int
> enable)
> >> /* inline function to enable interrupt for channel2 */
> >> static inline void channel2_intr_enable(int enable)
> >> {
> >> + unsigned long flags;
> >> +
> >> + spin_lock_irqsave(&vpif_lock, flags);
> >> +
> >> if (enable) {
> >> regw((regr(VPIF_INTEN) | 0x10), VPIF_INTEN);
> >> regw((regr(VPIF_INTEN_SET) | 0x10), VPIF_INTEN_SET);
> >> @@ -442,11 +459,16 @@ static inline void channel2_intr_enable(int
> >> enable)
> >> regw((regr(VPIF_INTEN_SET) | VPIF_INTEN_FRAME_CH2),
> >> VPIF_INTEN_SET);
> >> }
> >> + spin_unlock_irqrestore(&vpif_lock, flags);
> >> }
> >>
> >> /* inline function to enable interrupt for channel3 */
> >> static inline void channel3_intr_enable(int enable)
> >> {
> >> + unsigned long flags;
> >> +
> >> + spin_lock_irqsave(&vpif_lock, flags);
> >> +
> >> if (enable) {
> >> regw((regr(VPIF_INTEN) | 0x10), VPIF_INTEN);
> >> regw((regr(VPIF_INTEN_SET) | 0x10), VPIF_INTEN_SET);
> >> @@ -459,6 +481,7 @@ static inline void channel3_intr_enable(int
> >> enable)
> >> regw((regr(VPIF_INTEN_SET) | VPIF_INTEN_FRAME_CH3),
> >> VPIF_INTEN_SET);
> >> }
> >> + spin_unlock_irqrestore(&vpif_lock, flags);
> >> }
> >>
> >> /* inline function to enable raw vbi data for channel2 */
> >> @@ -571,7 +594,7 @@ struct vpif_channel_config_params {
> >> v4l2_std_id stdid;
> >> };
> >>
> >> -struct vpif_interface;
> >> +struct vpif_video_params;
> >> struct vpif_params;
> >> struct vpif_vbi_params;
> >>
> >> @@ -579,13 +602,6 @@ int vpif_set_video_params(struct vpif_params
> >> *vpifparams, u8 channel_id);
> >> void vpif_set_vbi_display_params(struct vpif_vbi_params
> *vbiparams,
> >> u8 channel_id);
> >> int vpif_channel_getfid(u8 channel_id);
> >> -void vpif_base_addr_init(void __iomem *base);
> >> -
> >> -/* Enumerated data types */
> >> -enum vpif_capture_pinpol {
> >> - VPIF_CAPTURE_PINPOL_SAME = 0,
> >> - VPIF_CAPTURE_PINPOL_INVERT = 1
> >> -};
> >>
> >> enum data_size {
> >> _8BITS = 0,
> >> @@ -593,13 +609,6 @@ enum data_size {
> >> _12BITS,
> >> };
> >>
> >> -struct vpif_capture_params_raw {
> >> - enum data_size data_sz;
> >> - enum vpif_capture_pinpol fid_pol;
> >> - enum vpif_capture_pinpol vd_pol;
> >> - enum vpif_capture_pinpol hd_pol;
> >> -};
> >> -
> >> /* Structure for vpif parameters for raw vbi data */
> >> struct vpif_vbi_params {
> >> __u32 hstart0; /* Horizontal start of raw vbi data for first
> >> field */
> >> @@ -613,18 +622,19 @@ struct vpif_vbi_params {
> >> };
> >>
> >> /* structure for vpif parameters */
> >> -struct vpif_interface {
> >> +struct vpif_video_params {
> >> __u8 storage_mode; /* Indicates field or frame mode */
> >> unsigned long hpitch;
> >> v4l2_std_id stdid;
> >> };
> >>
> >> struct vpif_params {
> >> - struct vpif_interface video_params;
> >> + struct vpif_interface iface;
> >> + struct vpif_video_params video_params;
> >> struct vpif_channel_config_params std_info;
> >> union param {
> >> struct vpif_vbi_params vbi_params;
> >> - struct vpif_capture_params_raw raw_params;
> >> + enum data_size data_sz;
> >> } params;
> >> };
> >>
> >> --
> >> 1.6.0.4
> >>
> >> --
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