> From: Pekka Paalanen <ppaalanen at gmail.com>
> Sent: Thursday, November 18, 2021 2:33 PM
> To: Modem, Bhanuprakash <bhanuprakash.modem at intel.com>
> Cc: igt-dev at lists.freedesktop.org; dri-devel at lists.freedesktop.org; Juha-Pekka
> Heikkila <juhapekka.heikkila at gmail.com>; Shankar, Uma <uma.shankar at intel.com>
> Subject: Re: [i-g-t 04/14] tests/kms_color: New subtests for Plane gamma
>
> On Mon, 15 Nov 2021 15:17:49 +0530
> Bhanuprakash Modem <bhanuprakash.modem at intel.com> wrote:
>
> > To verify Plane gamma, draw 3 gradient rectangles in red, green and blue,
> > with a maxed out gamma LUT and verify we have the same CRC as drawing solid
> > color rectangles.
> >
> > Cc: Harry Wentland <harry.wentland at amd.com>
> > Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> > Cc: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> > Cc: Uma Shankar <uma.shankar at intel.com>
> > Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
> > ---
> > tests/kms_color.c | 179 +++++++++++++++++++++++++++++++++++++++++++++-
> > 1 file changed, 178 insertions(+), 1 deletion(-)
> >
> > diff --git a/tests/kms_color.c b/tests/kms_color.c
> > index 775f35964f..b45d66762f 100644
> > --- a/tests/kms_color.c
> > +++ b/tests/kms_color.c
> > @@ -24,7 +24,34 @@
> >
> > #include "kms_color_helper.h"
> >
> > -IGT_TEST_DESCRIPTION("Test Color Features at Pipe level");
> > +IGT_TEST_DESCRIPTION("Test Color Features at Pipe & Plane level");
> > +
> > +#define MAX_SUPPORTED_PLANES 7
> > +#define SDR_PLANE_BASE 3
> > +
> > +typedef bool (*test_t)(data_t*, igt_plane_t*);
> > +
> > +static bool is_hdr_plane(const igt_plane_t *plane)
> > +{
> > + return plane->index >= 0 && plane->index < SDR_PLANE_BASE;
>
> How can this be right for all KMS drivers?
>
> What is a HDR plane?
>
> > +}
> > +
> > +static bool is_valid_plane(igt_plane_t *plane)
> > +{
> > + int index = plane->index;
> > +
> > + if (plane->type != DRM_PLANE_TYPE_PRIMARY)
> > + return false;
> > +
> > + /*
> > + * Test 1 HDR plane, 1 SDR plane.
> > + *
> > + * 0,1,2 HDR planes
> > + * 3,4,5,6 SDR planes
>
> As above, where does this come from? Is this your hardware?
It is specific to Intel hardware, I'll make this generic in next rev.
Extended mode:
By default to optimize the CI, we can run these tests on first & last
planes only, If we want to cover all the planes, we need to pass an
argument in commandline
Example:
./kms_color --run-subtest pipe-A-plane-gamma
./kms_color --extend --run-subtest pipe-A-plane-gamma
>
> > + *
> > + */
> > + return index >= 0 && index < MAX_SUPPORTED_PLANES;
> > +}
> >
> > static void test_pipe_degamma(data_t *data,
> > igt_plane_t *primary)
> > @@ -638,6 +665,122 @@ static void test_pipe_limited_range_ctm(data_t *data,
> > }
> > #endif
> >
> > +static bool plane_gamma_test(data_t *data, igt_plane_t *plane)
> > +{
> > + igt_output_t *output;
> > + igt_display_t *display = &data->display;
> > + drmModeModeInfo *mode;
> > + struct igt_fb fb;
> > + drmModePropertyPtr gamma_mode = NULL;
> > + uint32_t i;
> > + bool ret = true;
> > + igt_pipe_crc_t *pipe_crc = NULL;
> > + color_t red_green_blue[] = {
> > + { 1.0, 0.0, 0.0 },
> > + { 0.0, 1.0, 0.0 },
> > + { 0.0, 0.0, 1.0 }
> > + };
> > +
> > + igt_info("Plane gamma test is running on pipe-%s plane-%s(%s)\n",
> > + kmstest_pipe_name(plane->pipe->pipe),
> > + kmstest_plane_type_name(plane->type),
> > + is_hdr_plane(plane) ? "hdr":"sdr");
> > +
> > + igt_require(igt_plane_has_prop(plane, IGT_PLANE_GAMMA_MODE));
> > + igt_require(igt_plane_has_prop(plane, IGT_PLANE_GAMMA_LUT));
> > +
> > + pipe_crc = igt_pipe_crc_new(data->drm_fd,
> > + plane->pipe->pipe,
> > + INTEL_PIPE_CRC_SOURCE_AUTO);
> > +
> > + output = igt_get_single_output_for_pipe(display, plane->pipe->pipe);
> > + igt_assert(output);
> > +
> > + igt_output_set_pipe(output, plane->pipe->pipe);
> > + mode = igt_output_get_mode(output);
> > +
> > + /* Create a framebuffer at the size of the output. */
> > + igt_assert(igt_create_fb(data->drm_fd,
> > + mode->hdisplay,
> > + mode->vdisplay,
> > + DRM_FORMAT_XRGB8888,
> > + DRM_FORMAT_MOD_LINEAR,
> > + &fb));
> > + igt_plane_set_fb(plane, &fb);
> > +
> > + /* Disable Pipe color props. */
> > + disable_ctm(plane->pipe);
> > + disable_degamma(plane->pipe);
> > + disable_gamma(plane->pipe);
> > +
> > + disable_plane_ctm(plane);
> > + disable_plane_degamma(plane);
> > + igt_display_commit2(display, display->is_atomic ?
> > + COMMIT_ATOMIC : COMMIT_LEGACY);
> > +
> > + gamma_mode = get_plane_gamma_degamma_mode(plane, IGT_PLANE_GAMMA_MODE);
> > +
> > + /* Iterate all supported gamma modes. */
> > + for (i = 0; i < gamma_mode->count_enums; i++) {
> > + igt_crc_t crc_gamma, crc_fullcolors;
> > + segment_data_t *segment_info = NULL;
> > + struct drm_color_lut_ext *lut = NULL;
> > + uint32_t lut_size = 0;
> > +
> > + /* Ignore 'no gamma' from enum list. */
> > + if (!strcmp(gamma_mode->enums[i].name, "no gamma"))
> > + continue;
> > +
> > + igt_info("Trying to use gamma mode: \'%s\'\n", gamma_mode-
> >enums[i].name);
> > +
> > + /* Draw solid colors with no gamma transformation. */
> > + disable_plane_gamma(plane);
> > + paint_rectangles(data, mode, red_green_blue, &fb);
> > + igt_plane_set_fb(plane, &fb);
> > + igt_display_commit2(display, display->is_atomic ?
> > + COMMIT_ATOMIC : COMMIT_LEGACY);
> > + igt_wait_for_vblank(data->drm_fd,
> > + display->pipes[plane->pipe->pipe].crtc_offset);
> > + igt_pipe_crc_collect_crc(pipe_crc, &crc_fullcolors);
> > +
> > + /* Draw gradient colors with gamma LUT to remap all
> > + * values to max red/green/blue.
> > + */
> > + segment_info = get_segment_data(data, gamma_mode->enums[i].value,
> > + gamma_mode->enums[i].name);
> > + lut_size = sizeof(struct drm_color_lut_ext) * segment_info-
> >entries_count;
> > + lut = create_max_lut(segment_info);
>
> Using max LUT seems like a weak test. I recall seeing problem reports
> related to alpha blending where trying to display an alpha gradient
> essentially resulted in what max LUT would produce.
Due to the hardware roundups, we are getting crc mismatches for any LUTs.
So, by default we can compare
"gradient colors + max LUT" and "solid colors + No/unity LUT"
In extend mode (Please check above comments)
Other h/w vendors can extend the support for different LUTs
- Bhanu
>
>
> Thanks,
> pq
>
> > + set_plane_gamma(plane, gamma_mode->enums[i].name, lut, lut_size);
> > +
> > + paint_gradient_rectangles(data, mode, red_green_blue, &fb);
> > + igt_plane_set_fb(plane, &fb);
> > + igt_display_commit2(display, display->is_atomic ?
> > + COMMIT_ATOMIC : COMMIT_LEGACY);
> > + igt_wait_for_vblank(data->drm_fd,
> > + display->pipes[plane->pipe->pipe].crtc_offset);
> > + igt_pipe_crc_collect_crc(pipe_crc, &crc_gamma);
> > +
> > + /* Verify that the CRC of the software computed output is
> > + * equal to the CRC of the gamma LUT transformation output.
> > + */
> > + ret &= igt_check_crc_equal(&crc_gamma, &crc_fullcolors);
> > +
> > + free(lut);
> > + clear_segment_data(segment_info);
> > + }
> > +
> > + disable_plane_gamma(plane);
> > + igt_plane_set_fb(plane, NULL);
> > + igt_output_set_pipe(output, PIPE_NONE);
> > + igt_display_commit2(display, display->is_atomic ?
> > + COMMIT_ATOMIC : COMMIT_LEGACY);
> > +
> > + igt_pipe_crc_free(pipe_crc);
> > + drmModeFreeProperty(gamma_mode);
> > +
> > + return ret;
> > +}
> > +
> > static void
> > prep_pipe(data_t *data, enum pipe p)
> > {
> > @@ -890,6 +1033,37 @@ run_invalid_tests_for_pipe(data_t *data, enum pipe p)
> > invalid_ctm_matrix_sizes(data, p);
> > }
> >
> > +static void run_plane_color_test(data_t *data, enum pipe pipe, test_t test)
> > +{
> > + igt_plane_t *plane;
> > + int count = 0;
> > +
> > + for_each_plane_on_pipe(&data->display, pipe, plane) {
> > + if (!is_valid_plane(plane))
> > + continue;
> > +
> > + igt_assert(test(data, plane));
> > +
> > + count++;
> > + }
> > +
> > + igt_require_f(count, "No valid planes found.\n");
> > +}
> > +
> > +static void run_tests_for_plane(data_t *data, enum pipe pipe)
> > +{
> > + igt_fixture {
> > + igt_require_pipe(&data->display, pipe);
> > + igt_require_pipe_crc(data->drm_fd);
> > + igt_require(data->display.pipes[pipe].n_planes > 0);
> > + igt_display_require_output_on_pipe(&data->display, pipe);
> > + }
> > +
> > + igt_describe("Compare maxed out plane gamma LUT and solid color linear
> LUT");
> > + igt_subtest_f("pipe-%s-plane-gamma", kmstest_pipe_name(pipe))
> > + run_plane_color_test(data, pipe, plane_gamma_test);
> > +}
> > +
> > igt_main
> > {
> > data_t data = {};
> > @@ -910,6 +1084,9 @@ igt_main
> >
> > igt_subtest_group
> > run_invalid_tests_for_pipe(&data, pipe);
> > +
> > + igt_subtest_group
> > + run_tests_for_plane(&data, pipe);
> > }
> >
> > igt_fixture {