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7cbce45d62
Yes, apparently we've been testing this for every single driver load for quite a long time now. At least that means our PBN calculation is solid! Anyway, introduce self tests for MST and move this into there. Cc: Juston Li <juston.li@intel.com> Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Harry Wentland <hwentlan@amd.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190903204645.25487-5-lyude@redhat.com
34 lines
732 B
C
34 lines
732 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Test cases for for the DRM DP MST helpers
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*/
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#include <drm/drm_dp_mst_helper.h>
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#include <drm/drm_print.h>
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#include "test-drm_modeset_common.h"
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int igt_dp_mst_calc_pbn_mode(void *ignored)
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{
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int pbn, i;
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const struct {
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int rate;
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int bpp;
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int expected;
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} test_params[] = {
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{ 154000, 30, 689 },
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{ 234000, 30, 1047 },
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{ 297000, 24, 1063 },
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};
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for (i = 0; i < ARRAY_SIZE(test_params); i++) {
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pbn = drm_dp_calc_pbn_mode(test_params[i].rate,
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test_params[i].bpp);
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FAIL(pbn != test_params[i].expected,
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"Expected PBN %d for clock %d bpp %d, got %d\n",
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test_params[i].expected, test_params[i].rate,
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test_params[i].bpp, pbn);
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}
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return 0;
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}
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