diff options
| author | Samson Tam <Samson.Tam@amd.com> | 2025-01-21 11:01:47 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-02-25 11:44:02 -0500 |
| commit | 0d3004647631aedb713251525a99784661574767 (patch) | |
| tree | 8c53b69fcf470d740c666ec80ff1e562cf05f490 /drivers/gpu/drm/amd/display | |
| parent | 26873260d394b1e33cdd720154aedf0af95327f9 (diff) | |
drm/amd/display: fix check for identity ratio
[Why]
IDENTITY_RATIO check uses 2 bits for integer, which only allows
checking downscale ratios up to 3. But we support up to 6x
downscale
[How]
Update IDENTITY_RATIO to check 3 bits for integer
Add ASSERT to catch if we downscale more than 6x
Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Jun Lei <jun.lei@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c | 21 |
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c b/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c index 3d85732cc0f5..047f05ab0181 100644 --- a/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c +++ b/drivers/gpu/drm/amd/display/dc/sspl/dc_spl.c @@ -8,7 +8,7 @@ #include "dc_spl_isharp_filters.h" #include "spl_debug.h" -#define IDENTITY_RATIO(ratio) (spl_fixpt_u2d19(ratio) == (1 << 19)) +#define IDENTITY_RATIO(ratio) (spl_fixpt_u3d19(ratio) == (1 << 19)) #define MIN_VIEWPORT_SIZE 12 static bool spl_is_yuv420(enum spl_pixel_format format) @@ -887,6 +887,8 @@ static bool spl_get_isharp_en(struct spl_in *spl_in, static void spl_get_taps_non_adaptive_scaler( struct spl_scratch *spl_scratch, const struct spl_taps *in_taps) { + bool check_max_downscale = false; + if (in_taps->h_taps == 0) { if (spl_fixpt_ceil(spl_scratch->scl_data.ratios.horz) > 1) spl_scratch->scl_data.taps.h_taps = spl_min(2 * spl_fixpt_ceil( @@ -926,6 +928,23 @@ static void spl_get_taps_non_adaptive_scaler( else spl_scratch->scl_data.taps.h_taps_c = in_taps->h_taps_c; + + /* + * Max downscale supported is 6.0x. Add ASSERT to catch if go beyond that + */ + check_max_downscale = spl_fixpt_le(spl_scratch->scl_data.ratios.horz, + spl_fixpt_from_fraction(6, 1)); + SPL_ASSERT(check_max_downscale); + check_max_downscale = spl_fixpt_le(spl_scratch->scl_data.ratios.vert, + spl_fixpt_from_fraction(6, 1)); + SPL_ASSERT(check_max_downscale); + check_max_downscale = spl_fixpt_le(spl_scratch->scl_data.ratios.horz_c, + spl_fixpt_from_fraction(6, 1)); + SPL_ASSERT(check_max_downscale); + check_max_downscale = spl_fixpt_le(spl_scratch->scl_data.ratios.vert_c, + spl_fixpt_from_fraction(6, 1)); + SPL_ASSERT(check_max_downscale); + if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.horz)) spl_scratch->scl_data.taps.h_taps = 1; if (IDENTITY_RATIO(spl_scratch->scl_data.ratios.vert)) |