[igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip crc assertion in coverage-vs-premult-vs-none for 6bpc panels

[Srinivas, Vidya]

Hello Bhanu,

I have submitted the patch with skipping test also.
Kindly check, which ever version is okay for merge is fine.
Thank you so much.

https://patchwork.freedesktop.org/patch/443207/?series=90828&rev=14

Regards
Vidya

-----Original Message-----
From: Srinivas, Vidya 
Sent: Thursday, July 8, 2021 6:14 PM
To: Modem, Bhanuprakash <Bhanuprakash.Modem at intel.com>; igt-dev at lists.freedesktop.org; Shankar, Uma <uma.shankar at intel.com>
Subject: RE: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip crc assertion in coverage-vs-premult-vs-none for 6bpc panels

Hi Bhanu,

Sure, I can skip the test as well. Whichever way is okay. The only requirement is atleast one commit has to be done, so that bpp shows up.
Kindly suggest.

Regards
Vidya

-----Original Message-----
From: Modem, Bhanuprakash <bhanuprakash.modem at intel.com>
Sent: Thursday, July 8, 2021 5:51 PM
To: Srinivas, Vidya <vidya.srinivas at intel.com>; igt-dev at lists.freedesktop.org; Shankar, Uma <uma.shankar at intel.com>
Subject: RE: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip crc assertion in coverage-vs-premult-vs-none for 6bpc panels

> From: Srinivas, Vidya <vidya.srinivas at intel.com>
> Sent: Thursday, July 8, 2021 5:03 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem at intel.com>; igt- 
> dev at lists.freedesktop.org
> Subject: RE: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip 
> crc assertion in coverage-vs-premult-vs-none for 6bpc panels
> 
> Hello Bhanu,
> 
> No we skip it for all 6bpc. We can skip the test, but as discussed 
> with Uma, I just skip crc check, not the test.
> Kindly suggest further.

If we remove/skip the crc check, I think there is no point in doing further commits unless we have kernel checkers.

Uma?

> 
> Regards
> Vidya
> 
> -----Original Message-----
> From: Modem, Bhanuprakash <bhanuprakash.modem at intel.com>
> Sent: Thursday, July 8, 2021 4:15 PM
> To: Srinivas, Vidya <vidya.srinivas at intel.com>; 
> igt-dev at lists.freedesktop.org
> Subject: RE: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip 
> crc assertion in coverage-vs-premult-vs-none for 6bpc panels
> 
> > From: igt-dev <igt-dev-bounces at lists.freedesktop.org> On Behalf Of 
> > Vidya Srinivas
> > Sent: Thursday, July 8, 2021 3:01 PM
> > To: igt-dev at lists.freedesktop.org
> > Subject: [igt-dev] [PATCH i-g-t] tests/kms_plane_alpha_blend: Skip 
> > crc assertion in coverage-vs-premult-vs-none for 6bpc panels
> >
> > Intel Gen11 platforms using 6bpc panels have dithering ON and show 
> > CRC mismatch in coverage-vs-premult-vs-none Doing a crc based test 
> > with dithering is not a great idea as pixels will change due to the 
> > 8bit to 6bits truncation with dithering.
> >
> > This patch skips the CRC assertion for 6bpc panels. Currently, there 
> > is no better way of fetching the bpc info other than EDID or 
> > display_info. Currently using i915_display_info for the same. Hence 
> > restricting the check to i915 devices only.
> >
> > Credits-to: Uma Shankar <uma.shankar at intel.com>
> > Credits-to: Juha-pekka Heikkila <juha-pekka.heikkila at intel.com>
> > Credits-to: Modem Bhanuprakash <Bhanuprakash.Modem at intel.com>
> > Reviewed-by: Uma Shankar <uma.shankar at intel.com>
> > Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
> > ---
> >  tests/kms_plane_alpha_blend.c | 43
> > +++++++++++++++++++++++++++++++++--
> >  1 file changed, 41 insertions(+), 2 deletions(-)
> >
> > diff --git a/tests/kms_plane_alpha_blend.c 
> > b/tests/kms_plane_alpha_blend.c index a37cb27c7d62..e450e64cb105
> > 100644
> > --- a/tests/kms_plane_alpha_blend.c
> > +++ b/tests/kms_plane_alpha_blend.c
> > @@ -442,10 +442,42 @@ static void coverage_7efc(data_t *data, enum 
> > pipe pipe, igt_plane_t *plane)
> >  	igt_pipe_crc_stop(data->pipe_crc);
> >  }
> >
> > +static bool is_6bpc(igt_display_t *display, enum pipe pipe) {
> > +	char buf[4096];
> > +	char *str;
> > +	bool ret;
> > +	int debugfs_fd;
> > +	drmModeConnector *c;
> > +	igt_output_t *output = igt_get_single_output_for_pipe(display,
> > +pipe);
> > +
> > +	if (!is_i915_device(display->drm_fd))
> > +		return false;
> > +
> > +	c = output->config.connector;
> > +	if (c->connector_type != DRM_MODE_CONNECTOR_eDP)
> > +		return false;
> > +
> > +	debugfs_fd = igt_debugfs_dir(display->drm_fd);
> > +	if (debugfs_fd < 0)
> > +		return false;
> > +
> > +	igt_debugfs_simple_read(debugfs_fd, "i915_display_info", buf,
> > sizeof(buf));
> > +
> > +	str = strstr(buf, "bpp=");
> > +	if (str && (strncmp(str, "bpp=18", 6) == 0))
> > +		ret = true;
> > +	else
> > +		ret = false;
> > +
> > +	close(debugfs_fd);
> > +	return ret;
> > +}
> > +
> >  static void coverage_premult_constant(data_t *data, enum pipe pipe, 
> > igt_plane_t *plane)  {
> >  	igt_display_t *display = &data->display;
> >  	igt_crc_t ref_crc = {}, crc = {};
> > +	bool is6bpc = false;
> >
> >  	/* Set a background color on the primary fb for testing */
> >  	if (plane->type != DRM_PLANE_TYPE_PRIMARY) @@ -461,14 +493,21 @@ 
> > static void coverage_premult_constant(data_t *data, enum pipe pipe, 
> > igt_plane_t
> >  	igt_plane_set_fb(plane, &data->argb_fb_7e);
> >  	igt_display_commit2(display, COMMIT_ATOMIC);
> >  	igt_pipe_crc_get_current(display->drm_fd, data->pipe_crc, &crc);
> > -	igt_assert_crc_equal(&ref_crc, &crc);
> > +
> > +	/* 6bpc panels have dithering ON and CRC might fail, hence skip 
> > +crc
> > check */
> > +	is6bpc = is_6bpc(display, pipe);
> > +	if (is6bpc == false)
> > +		igt_assert_crc_equal(&ref_crc, &crc);
> 
> We can SKIP here, right? Also no need to run on remaining planes. 
> Otherwise IGT will report this test result as PASS instead of reporting as SKIP.
> 
> igt_require_f(!is_6bpc(display, pipe), "Skip test on 6 bpc panels\n");
> 
> 
> Also, are we going to skip this test on only gen 11? Then we need a 
> check to perform such.
> 
> if (is_i915_device(fd) && intel_gen(intel_get_drm_devid(fd)) == 11)
> 	igt_require_f(!is_6bpc(display, pipe), "Skip test on 6 bpc 
> panels\n");
> 
> >
> >  	igt_plane_set_prop_enum(plane, IGT_PLANE_PIXEL_BLEND_MODE, "None");
> >  	igt_plane_set_prop_value(plane, IGT_PLANE_ALPHA, 0x7e7e);
> >  	igt_plane_set_fb(plane, &data->argb_fb_cov_7e);
> >  	igt_display_commit2(display, COMMIT_ATOMIC);
> >  	igt_pipe_crc_get_current(display->drm_fd, data->pipe_crc, &crc);
> > -	igt_assert_crc_equal(&ref_crc, &crc);
> > +
> > +	/* 6bpc panels have dithering ON and CRC might fail, hence skip 
> > +crc
> > check */
> > +	if (is6bpc == false)
> > +		igt_assert_crc_equal(&ref_crc, &crc);
> >
> >  	igt_pipe_crc_stop(data->pipe_crc);
> >  }
> > --
> > 2.32.0
> >
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