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fc6de1c565
Hardware understands the regamma LUT as a piecewise linear function, with points spaced exponentially along the range. We previously programmed the LUT for range [2^-10, 2^0). This causes (normalized) color values of 1 (=2^0) to miss the programmed LUT, and fall onto the end region. For DCE, the end region is extrapolated using a single (base, slope) pair, using the max y-value from the last point in the curve as base. This presents a problem, since this value affects all three color channels. Scaling down the intensity of say - the blue regamma curve - will not affect it's end region. This is especially noticiable when using RedShift. It scales down the blue and green channels, but leaves full-intensity colors unshifted. Therefore, extend the range to cover [2^-10, 2^1) by programming another hardware segment, containing only one point. That way, we won't be hitting the end region. Note that things are a bit different for DCN, since the end region can be set per-channel. Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com> Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
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| .. | ||
| basics | ||
| bios | ||
| calcs | ||
| core | ||
| dce | ||
| dce80 | ||
| dce100 | ||
| dce110 | ||
| dce112 | ||
| dce120 | ||
| dcn10 | ||
| dml | ||
| gpio | ||
| i2caux | ||
| inc | ||
| irq | ||
| virtual | ||
| dc.h | ||
| dc_bios_types.h | ||
| dc_ddc_types.h | ||
| dc_dp_types.h | ||
| dc_helper.c | ||
| dc_hw_types.h | ||
| dc_link.h | ||
| dc_stream.h | ||
| dc_types.h | ||
| dm_helpers.h | ||
| dm_pp_smu.h | ||
| dm_services.h | ||
| dm_services_types.h | ||
| irq_types.h | ||
| Makefile | ||
| os_types.h | ||