diff options
Diffstat (limited to 'meta-r1000/recipes-kernel/linux/linux-yocto-4.14.71/4203-drm-amd-display-Fix-regamma-not-affecting-full-inten.patch')
| -rw-r--r-- | meta-r1000/recipes-kernel/linux/linux-yocto-4.14.71/4203-drm-amd-display-Fix-regamma-not-affecting-full-inten.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/meta-r1000/recipes-kernel/linux/linux-yocto-4.14.71/4203-drm-amd-display-Fix-regamma-not-affecting-full-inten.patch b/meta-r1000/recipes-kernel/linux/linux-yocto-4.14.71/4203-drm-amd-display-Fix-regamma-not-affecting-full-inten.patch deleted file mode 100644 index 566a23ce..00000000 --- a/meta-r1000/recipes-kernel/linux/linux-yocto-4.14.71/4203-drm-amd-display-Fix-regamma-not-affecting-full-inten.patch +++ /dev/null @@ -1,66 +0,0 @@ -From f6c8e652bc51d783469d2c7a59e014b9af0b2396 Mon Sep 17 00:00:00 2001 -From: "Leo (Sunpeng) Li" <sunpeng.li@amd.com> -Date: Tue, 3 Apr 2018 16:07:16 -0400 -Subject: [PATCH 4203/5725] drm/amd/display: Fix regamma not affecting - full-intensity color values - -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> ---- - drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 9 ++++++--- - 1 file changed, 6 insertions(+), 3 deletions(-) - -diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c -index 5bed5a3..b95dd9f 100644 ---- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c -+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c -@@ -456,10 +456,13 @@ dce110_translate_regamma_to_hw_format(const struct dc_transfer_func *output_tf, - - } else { - /* 10 segments -- * segment is from 2^-10 to 2^0 -+ * segment is from 2^-10 to 2^1 -+ * We include an extra segment for range [2^0, 2^1). This is to -+ * ensure that colors with normalized values of 1 don't miss the -+ * LUT. - */ - region_start = -10; -- region_end = 0; -+ region_end = 1; - - seg_distr[0] = 4; - seg_distr[1] = 4; -@@ -471,7 +474,7 @@ dce110_translate_regamma_to_hw_format(const struct dc_transfer_func *output_tf, - seg_distr[7] = 4; - seg_distr[8] = 4; - seg_distr[9] = 4; -- seg_distr[10] = -1; -+ seg_distr[10] = 0; - seg_distr[11] = -1; - seg_distr[12] = -1; - seg_distr[13] = -1; --- -2.7.4 - |