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Message-ID: <CA+V-a8vmLT_W_VLKZjYLyHrpR-1ZuXjwnDP5UYGGpQwCeQ-00A@mail.gmail.com>
Date: Tue, 25 Sep 2012 11:08:12 +0530
From: Prabhakar Lad <prabhakar.csengg@...il.com>
To: Hans Verkuil <hverkuil@...all.nl>
Cc: LMML <linux-media@...r.kernel.org>,
DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
LAK <linux-arm-kernel@...ts.infradead.org>,
Sekhar Nori <nsekhar@...com>,
Mauro Carvalho Chehab <mchehab@...radead.org>,
VGER <linux-kernel@...r.kernel.org>,
"Lad, Prabhakar" <prabhakar.lad@...com>,
Manjunath Hadli <manjunath.hadli@...com>,
Hans Verkuil <hans.verkuil@...co.com>
Subject: Re: [PATCH v2] media: davinci: vpif: display: separate out subdev
from output
Hi Hans,
On Mon, Sep 24, 2012 at 7:02 PM, Hans Verkuil <hverkuil@...all.nl> wrote:
> On Mon September 24 2012 15:21:44 Prabhakar Lad wrote:
>> Hi Hans,
>>
>> On Mon, Sep 24, 2012 at 5:20 PM, Hans Verkuil <hverkuil@...all.nl> wrote:
>> > On Mon September 24 2012 12:59:11 Hans Verkuil wrote:
>> >> On Mon September 24 2012 12:44:11 Prabhakar wrote:
>> >> > From: Lad, Prabhakar <prabhakar.lad@...com>
>> >> >
>> >> > vpif_display relied on a 1-1 mapping of output and subdev. This is not
>> >> > necessarily the case. Separate the two. So there is a list of subdevs
>> >> > and a list of outputs. Each output refers to a subdev and has routing
>> >> > information. An output does not have to have a subdev.
>> >> >
>> >> > The initial output for each channel is set to the fist output.
>> >> >
>> >> > Currently missing is support for associating multiple subdevs with
>> >> > an output.
>> >> >
>> >> > Signed-off-by: Lad, Prabhakar <prabhakar.lad@...com>
>> >> > Signed-off-by: Manjunath Hadli <manjunath.hadli@...com>
>> >> > Cc: Hans Verkuil <hans.verkuil@...co.com>
>> >> > Cc: Sekhar Nori <nsekhar@...com>
>> >>
>> >> Acked-by: Hans Verkuil <hans.verkuil@...co.com>
>> >
>> > I'm retracting this Ack. I did see something that wasn't right but I thought
>> > it was harmless, but after thinking some more I believe it should be fixed.
>> > Luckily, it's easy to fix. See below. Since we need a new version anyway I
>> > also added a comment to a few minor issues that can be fixed at the same time.
>> >
>> >>
>> >> Regards,
>> >>
>> >> Hans
>> >>
>> >> > ---
>> >> > This patch is dependent on the patch series from Hans
>> >> > (http://www.mail-archive.com/linux-media@vger.kernel.org/msg52270.html)
>> >> >
>> >> > Changes for V2:
>> >> > 1: Changed v4l2_device_call_until_err() call to v4l2_subdev_call() for
>> >> > s_routing, since this call is for specific subdev, pointed out by Hans.
>> >> >
>> >> > arch/arm/mach-davinci/board-da850-evm.c | 29 +++++-
>> >> > arch/arm/mach-davinci/board-dm646x-evm.c | 39 ++++++-
>> >> > drivers/media/platform/davinci/vpif_display.c | 136 ++++++++++++++++++++-----
>> >> > include/media/davinci/vpif_types.h | 20 +++-
>> >> > 4 files changed, 183 insertions(+), 41 deletions(-)
>> >> >
>> >> > diff --git a/arch/arm/mach-davinci/board-da850-evm.c b/arch/arm/mach-davinci/board-da850-evm.c
>> >> > index 3081ea4..23a7012 100644
>> >> > --- a/arch/arm/mach-davinci/board-da850-evm.c
>> >> > +++ b/arch/arm/mach-davinci/board-da850-evm.c
>> >> > @@ -46,6 +46,7 @@
>> >> > #include <mach/spi.h>
>> >> >
>> >> > #include <media/tvp514x.h>
>> >> > +#include <media/adv7343.h>
>> >> >
>> >> > #define DA850_EVM_PHY_ID "davinci_mdio-0:00"
>> >> > #define DA850_LCD_PWR_PIN GPIO_TO_PIN(2, 8)
>> >> > @@ -1257,16 +1258,34 @@ static struct vpif_subdev_info da850_vpif_subdev[] = {
>> >> > },
>> >> > };
>> >> >
>> >> > -static const char const *vpif_output[] = {
>> >> > - "Composite",
>> >> > - "S-Video",
>> >> > +static const struct vpif_output da850_ch0_outputs[] = {
>> >> > + {
>> >> > + .output = {
>> >> > + .index = 0,
>> >> > + .name = "Composite",
>> >> > + .type = V4L2_OUTPUT_TYPE_ANALOG,
>> >> > + },
>> >> > + .subdev_name = "adv7343",
>> >> > + .output_route = ADV7343_COMPOSITE_ID,
>> >> > + },
>> >> > + {
>> >> > + .output = {
>> >> > + .index = 1,
>> >> > + .name = "S-Video",
>> >> > + .type = V4L2_OUTPUT_TYPE_ANALOG,
>> >> > + },
>> >> > + .subdev_name = "adv7343",
>> >> > + .output_route = ADV7343_SVIDEO_ID,
>> >> > + },
>> >> > };
>> >> >
>> >> > static struct vpif_display_config da850_vpif_display_config = {
>> >> > .subdevinfo = da850_vpif_subdev,
>> >> > .subdev_count = ARRAY_SIZE(da850_vpif_subdev),
>> >> > - .output = vpif_output,
>> >> > - .output_count = ARRAY_SIZE(vpif_output),
>> >> > + .chan_config[0] = {
>> >> > + .outputs = da850_ch0_outputs,
>> >> > + .output_count = ARRAY_SIZE(da850_ch0_outputs),
>> >> > + },
>> >> > .card_name = "DA850/OMAP-L138 Video Display",
>> >> > };
>> >> >
>> >> > diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
>> >> > index ad249c7..c206768 100644
>> >> > --- a/arch/arm/mach-davinci/board-dm646x-evm.c
>> >> > +++ b/arch/arm/mach-davinci/board-dm646x-evm.c
>> >> > @@ -26,6 +26,7 @@
>> >> > #include <linux/i2c/pcf857x.h>
>> >> >
>> >> > #include <media/tvp514x.h>
>> >> > +#include <media/adv7343.h>
>> >> >
>> >> > #include <linux/mtd/mtd.h>
>> >> > #include <linux/mtd/nand.h>
>> >> > @@ -496,18 +497,44 @@ static struct vpif_subdev_info dm646x_vpif_subdev[] = {
>> >> > },
>> >> > };
>> >> >
>> >> > -static const char *output[] = {
>> >> > - "Composite",
>> >> > - "Component",
>> >> > - "S-Video",
>> >> > +static const struct vpif_output dm6467_ch0_outputs[] = {
>> >> > + {
>> >> > + .output = {
>> >> > + .index = 0,
>> >> > + .name = "Composite",
>> >> > + .type = V4L2_OUTPUT_TYPE_ANALOG,
>> >> > + },
>> >> > + .subdev_name = "adv7343",
>> >> > + .output_route = ADV7343_COMPOSITE_ID,
>> >> > + },
>> >> > + {
>> >> > + .output = {
>> >> > + .index = 1,
>> >> > + .name = "Component",
>> >> > + .type = V4L2_OUTPUT_TYPE_ANALOG,
>> >> > + },
>> >> > + .subdev_name = "adv7343",
>> >> > + .output_route = ADV7343_COMPONENT_ID,
>> >> > + },
>> >> > + {
>> >> > + .output = {
>> >> > + .index = 2,
>> >> > + .name = "S-Video",
>> >> > + .type = V4L2_OUTPUT_TYPE_ANALOG,
>> >> > + },
>> >> > + .subdev_name = "adv7343",
>> >> > + .output_route = ADV7343_SVIDEO_ID,
>> >> > + },
>> >> > };
>> >> >
>> >> > static struct vpif_display_config dm646x_vpif_display_config = {
>> >> > .set_clock = set_vpif_clock,
>> >> > .subdevinfo = dm646x_vpif_subdev,
>> >> > .subdev_count = ARRAY_SIZE(dm646x_vpif_subdev),
>> >> > - .output = output,
>> >> > - .output_count = ARRAY_SIZE(output),
>> >> > + .chan_config[0] = {
>> >> > + .outputs = dm6467_ch0_outputs,
>> >> > + .output_count = ARRAY_SIZE(dm6467_ch0_outputs),
>> >> > + },
>> >> > .card_name = "DM646x EVM",
>> >> > };
>> >> >
>> >> > diff --git a/drivers/media/platform/davinci/vpif_display.c b/drivers/media/platform/davinci/vpif_display.c
>> >> > index 8d1ce09..f68780f 100644
>> >> > --- a/drivers/media/platform/davinci/vpif_display.c
>> >> > +++ b/drivers/media/platform/davinci/vpif_display.c
>> >> > @@ -308,7 +308,7 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
>> >> > channel2_intr_assert();
>> >> > channel2_intr_enable(1);
>> >> > enable_channel2(1);
>> >> > - if (vpif_config_data->ch2_clip_en)
>> >> > + if (vpif_config_data->chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
>> >> > channel2_clipping_enable(1);
>> >> > }
>> >> >
>> >> > @@ -317,7 +317,7 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
>> >> > channel3_intr_assert();
>> >> > channel3_intr_enable(1);
>> >> > enable_channel3(1);
>> >> > - if (vpif_config_data->ch3_clip_en)
>> >> > + if (vpif_config_data->chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
>> >> > channel3_clipping_enable(1);
>> >> > }
>> >> >
>> >> > @@ -1174,14 +1174,16 @@ static int vpif_streamoff(struct file *file, void *priv,
>> >> > if (buftype == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
>> >> > /* disable channel */
>> >> > if (VPIF_CHANNEL2_VIDEO == ch->channel_id) {
>> >> > - if (vpif_config_data->ch2_clip_en)
>> >> > + if (vpif_config_data->
>> >> > + chan_config[VPIF_CHANNEL2_VIDEO].clip_en)
>> >> > channel2_clipping_enable(0);
>> >> > enable_channel2(0);
>> >> > channel2_intr_enable(0);
>> >> > }
>> >> > if ((VPIF_CHANNEL3_VIDEO == ch->channel_id) ||
>> >> > (2 == common->started)) {
>> >> > - if (vpif_config_data->ch3_clip_en)
>> >> > + if (vpif_config_data->
>> >> > + chan_config[VPIF_CHANNEL3_VIDEO].clip_en)
>> >> > channel3_clipping_enable(0);
>> >> > enable_channel3(0);
>> >> > channel3_intr_enable(0);
>> >> > @@ -1214,41 +1216,118 @@ static int vpif_enum_output(struct file *file, void *fh,
>> >> > {
>> >> >
>> >> > struct vpif_display_config *config = vpif_dev->platform_data;
>> >> > + struct vpif_display_chan_config *chan_cfg;
>> >> > + struct vpif_fh *vpif_handler = fh;
>> >> > + struct channel_obj *ch = vpif_handler->channel;
>> >> >
>> >> > - if (output->index >= config->output_count) {
>> >> > + chan_cfg = &config->chan_config[ch->channel_id];
>> >> > + if (output->index >= chan_cfg->output_count) {
>> >> > vpif_dbg(1, debug, "Invalid output index\n");
>> >> > return -EINVAL;
>> >> > }
>> >> >
>> >> > - strcpy(output->name, config->output[output->index]);
>> >> > - output->type = V4L2_OUTPUT_TYPE_ANALOG;
>> >> > + memcpy(output, &chan_cfg->outputs[output->index].output,
>> >> > + sizeof(*output));
>> >
>> > *output = chan_cfg->outputs[output->index].output;
>> >
>> >> > output->std = VPIF_V4L2_STD;
>> >
>> Should I move 'VPIF_V4L2_STD' this macro to vpif_types.h ?
>
> No. VPIF_V4L2_STD == V4L2_STD_ALL, so just use V4L2_STD_ALL directly.
>
Ok.
>> > This should be part of chan_cfg->outputs[output->index].output and not be
>> > overridden. If the output is a HDTV output, then std should be 0, otherwise
>> > it should be whatever the std is that is supported by the output.
>> >
>> > Really no different to what we do in vpif_capture.
>> >
>> Ok
>>
>> >> >
>> >> > return 0;
>> >> > }
>> >> >
>> >> > +/**
>> >> > + * vpif_output_to_subdev() - Maps output to sub device
>> >> > + * @vpif_cfg - global config ptr
>> >> > + * @chan_cfg - channel config ptr
>> >> > + * @index - Given output index from application
>> >> > + *
>> >> > + * lookup the sub device information for a given output index.
>> >> > + * we report all the output to application. output table also
>> >> > + * has sub device name for the each output
>> >> > + */
>> >> > +static int
>> >> > +vpif_output_to_subdev(struct vpif_display_config *vpif_cfg,
>> >> > + struct vpif_display_chan_config *chan_cfg, int index)
>> >> > +{
>> >> > + struct vpif_subdev_info *subdev_info;
>> >> > + const char *subdev_name;
>> >> > + int i;
>> >> > +
>> >> > + vpif_dbg(2, debug, "vpif_output_to_subdev\n");
>> >> > +
>> >> > + if (chan_cfg->outputs == NULL)
>> >> > + return -1;
>> >> > +
>> >> > + subdev_name = chan_cfg->outputs[index].subdev_name;
>> >> > + if (subdev_name == NULL)
>> >> > + return -1;
>> >> > +
>> >> > + /* loop through the sub device list to get the sub device info */
>> >> > + for (i = 0; i < vpif_cfg->subdev_count; i++) {
>> >> > + subdev_info = &vpif_cfg->subdevinfo[i];
>> >> > + if (!strcmp(subdev_info->name, subdev_name))
>> >> > + return i;
>> >> > + }
>> >> > + return -1;
>> >> > +}
>> >> > +
>> >> > +/**
>> >> > + * vpif_set_output() - Select an output
>> >> > + * @vpif_cfg - global config ptr
>> >> > + * @ch - channel
>> >> > + * @index - Given output index from application
>> >> > + *
>> >> > + * Select the given output.
>> >> > + */
>> >> > +static int vpif_set_output(struct vpif_display_config *vpif_cfg,
>> >> > + struct channel_obj *ch, int index)
>> >> > +{
>> >> > + struct vpif_display_chan_config *chan_cfg =
>> >> > + &vpif_cfg->chan_config[ch->channel_id];
>> >> > + struct vpif_subdev_info *subdev_info = NULL;
>> >> > + struct v4l2_subdev *sd = NULL;
>> >> > + u32 input = 0, output = 0;
>> >> > + int sd_index;
>> >> > + int ret;
>> >> > +
>> >> > + sd_index = vpif_output_to_subdev(vpif_cfg, chan_cfg, index);
>> >> > + if (sd_index >= 0) {
>> >> > + sd = vpif_obj.sd[sd_index];
>> >> > + subdev_info = &vpif_cfg->subdevinfo[sd_index];
>> >> > + }
>> >> > +
>> >> > + if (sd) {
>> >> > + input = chan_cfg->outputs[index].input_route;
>> >> > + output = chan_cfg->outputs[index].output_route;
>> >> > + ret = v4l2_subdev_call(sd, video, s_routing, input, output, 0);
>> >> > + if (ret < 0) {
>> >
>> > Replace with:
>> >
>> > if (ret < 0 && ret != -ENOIOCTLCMD) {
>> >
>> > It's OK if the subdev doesn't support this s_routing operation.
>> >
>> Ok
>>
>> >> > + vpif_err("Failed to set output\n");
>> >> > + return ret;
>> >> > + }
>> >> > +
>> >> > + }
>> >> > + ch->output_idx = index;
>> >> > + ch->sd = sd;
>> >
>> > Just like in the capture case you should update tvnorms:
>> >
>> > ch->video_dev->tvnorms = chan_cfg->inputs[index].output.std;
>> >
>> > Make sure tvnorms is no longer set in vpif_video_template.
>> > Ditto for current_norm. Since vpif_display.c supports g_std the current_norm
>> > field shouldn't be used anymore.
>> >
>> > The capture case also updates vpifparams.iface:
>> >
>> > ch->vpifparams.iface = chan_cfg->vpif_if;
>> >
>> > Isn't that needed for output as well?
>> >
>> The iface is never used in display, so there isnt any necessity to assign it.
>
> But it is used in vpif.c through vpif_set_video_params()!
>
Agreed iface is used in vpif_set_video_params(), but it still for capture.
there is check 'if (channel_id > 1)' in the function while accessing the iface
variable, so for display this will be always true, so no point in assigning it.
Thanks and Regards,
--Prabhakar Lad
> Regards,
>
> Hans
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