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| author | David Francis <David.Francis@amd.com> | 2019-08-21 17:33:26 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-01-10 02:07:46 +0300 |
| commit | dc48529fb14ee8450705c00d91f4dcc155e1c2cb (patch) | |
| tree | 75da55ea5145d34d4e7a0e897a8226921931a8ff /drivers/gpu/drm/selftests | |
| parent | 0f899fd466b693a129b16994c1b2b4db2fcde4a4 (diff) | |
| download | linux-dc48529fb14ee8450705c00d91f4dcc155e1c2cb.tar.xz | |
drm/dp_mst: Add PBN calculation for DSC modes
With DSC, bpp can be fractional in multiples of 1/16.
Change drm_dp_calc_pbn_mode to reflect this, adding a new
parameter bool dsc. When this parameter is true, treat the
bpp parameter as having units not of bits per pixel, but
1/16 of a bit per pixel
v2: Don't add separate function for this
v3: In the equation divide bpp by 16 as it is expected
not to leave any remainder
v4: Added DSC test parameters for selftest
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: David Francis <David.Francis@amd.com>
Signed-off-by: Mikita Lipski <mikita.lipski@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/selftests')
| -rw-r--r-- | drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c b/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c index af2b2de65316..bd990d178765 100644 --- a/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c +++ b/drivers/gpu/drm/selftests/test-drm_dp_mst_helper.c @@ -18,15 +18,19 @@ int igt_dp_mst_calc_pbn_mode(void *ignored) int rate; int bpp; int expected; + bool dsc; } test_params[] = { - { 154000, 30, 689 }, - { 234000, 30, 1047 }, - { 297000, 24, 1063 }, + { 154000, 30, 689, false }, + { 234000, 30, 1047, false }, + { 297000, 24, 1063, false }, + { 332880, 24, 50, true }, + { 324540, 24, 49, true }, }; for (i = 0; i < ARRAY_SIZE(test_params); i++) { pbn = drm_dp_calc_pbn_mode(test_params[i].rate, - test_params[i].bpp); + test_params[i].bpp, + test_params[i].dsc); FAIL(pbn != test_params[i].expected, "Expected PBN %d for clock %d bpp %d, got %d\n", test_params[i].expected, test_params[i].rate, |