Hi Sakari, Thanks for the review. On Tuesday 04 September 2012 01:09 AM, Sakari Ailus wrote: > Hi Prabhakar, > > Thanks for the patch. > > On Mon, Sep 03, 2012 at 02:46:17PM +0530, Prabhakar Lad wrote: >> From: Lad, Prabhakar <prabhakar.lad@xxxxxx> >> >> add V4L2_CID_TEST_PATTERN of type menu, which determines >> the internal test pattern selected by the device. >> >> Signed-off-by: Lad, Prabhakar <prabhakar.lad@xxxxxx> >> Signed-off-by: Manjunath Hadli <manjunath.hadli@xxxxxx> >> Cc: Sakari Ailus <sakari.ailus@xxxxxx> >> Cc: Hans Verkuil <hans.verkuil@xxxxxxxxx> >> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> >> Cc: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxx> >> Cc: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> >> Cc: Hans de Goede <hdegoede@xxxxxxxxxx> >> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> >> Cc: Rob Landley <rob@xxxxxxxxxxx> >> Cc: HeungJun Kim <riverful.kim@xxxxxxxxxxx> >> Cc: Rob Landley <rob@xxxxxxxxxxx> >> --- >> This patches has one checkpatch warning for line over >> 80 characters altough it can be avoided I have kept it >> for consistency. >> >> Documentation/DocBook/media/v4l/controls.xml | 52 ++++++++++++++++++++++++++ >> drivers/media/v4l2-core/v4l2-ctrls.c | 16 ++++++++ >> include/linux/videodev2.h | 12 ++++++ >> 3 files changed, 80 insertions(+), 0 deletions(-) >> >> diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml >> index f704218..06f16e7 100644 >> --- a/Documentation/DocBook/media/v4l/controls.xml >> +++ b/Documentation/DocBook/media/v4l/controls.xml >> @@ -4313,6 +4313,58 @@ interface and may change in the future.</para> >> </tbody> >> </entrytbl> >> </row> >> + <row> >> + <entry spanname="id"><constant>V4L2_CID_TEST_PATTERN</constant></entry> >> + <entry>menu</entry> >> + </row> >> + <row id="v4l2-test-pattern"> >> + <entry spanname="descr"> The capture devices/sensors have the capability to >> + generate internal test patterns. This test patterns are used to test a device >> + is properly working and can generate the desired waveforms that it supports. >> + </entry> >> + </row> >> + <row> >> + <entrytbl spanname="descr" cols="2"> >> + <tbody valign="top"> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_DISABLED</constant></entry> >> + <entry>Test pattern generation is disabled</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_VERTICAL_LINES</constant></entry> >> + <entry>Generate vertical lines as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_HORIZONTAL_LINES</constant></entry> >> + <entry>Generate horizontal lines as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_DIAGONAL_LINES</constant></entry> >> + <entry>Generate diagonal lines as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_SOLID_BLACK</constant></entry> >> + <entry>Generate solid black color as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_SOLID_WHITE</constant></entry> >> + <entry>Generate solid white color as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_SOLID_BLUE</constant></entry> >> + <entry>Generate solid blue color as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_SOLID_RED</constant></entry> >> + <entry>Generate solid red color as test pattern</entry> >> + </row> >> + <row> >> + <entry><constant>V4L2_TEST_PATTERN_CHECKER_BOARD</constant></entry> >> + <entry>Generate a checker board as test pattern</entry> >> + </row> > > You're defining 8 different test patterns based on a single device, I guess? > No. > As the test patterns are not standardised, I'd suppose that if another > driver implements the same control, it would require another n menu items > added to the same standard menu. That way we'd run quickly out of menu items > as the maximum is 32. > Agreed the test patterns are not standardized and are hardware dependent, but this entries which have been added are generally common across capture/display/sensors. > For this reason I'd leave the items in the menu up to the driver that > implements the control, until we have more information on the test patterns > different devices implement --- as discussed earlier. > Assuming that I only added disable test pattern and if a driver wants to implement this control and wants add an item to this menu, on what basis an entry to this menu will be qualified then ? Thanks and Regards, --Prabhakar Lad > Kind regards, > -- 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
