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| author | Stefan Schake <stschake@gmail.com> | 2018-04-20 15:25:44 +0300 |
|---|---|---|
| committer | Eric Anholt <eric@anholt.net> | 2018-04-23 21:32:55 +0300 |
| commit | 766cc6b1f7fc9e10f096a84d147e48dead18ba59 (patch) | |
| tree | 29491c5460283f6b4652f6e78deb51774b61d97b /drivers/gpu/drm/vc4/vc4_crtc.c | |
| parent | 22445f0316a253406472ddcda98c3341b1eebaf4 (diff) | |
| download | linux-766cc6b1f7fc9e10f096a84d147e48dead18ba59.tar.xz | |
drm/vc4: Add CTM support
The hardware has a single block for applying a CTM prior to gamma lut.
It can be fed with pixels from one of our CRTC at a time and uses a
matrix with S0.9 scalars. Use private atomic state to reject attempts
from userland to apply CTM for more than one CRTC at a time and reject
matrices with scalars that we can't approximate without integer bits.
Signed-off-by: Stefan Schake <stschake@gmail.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/218067/
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_crtc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_crtc.c b/drivers/gpu/drm/vc4/vc4_crtc.c index 08fe8dd7d8df..83d3b7912fc2 100644 --- a/drivers/gpu/drm/vc4/vc4_crtc.c +++ b/drivers/gpu/drm/vc4/vc4_crtc.c @@ -1018,6 +1018,11 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data) drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r)); drm_crtc_enable_color_mgmt(crtc, 0, false, crtc->gamma_size); + /* We support CTM, but only for one CRTC at a time. It's therefore + * implemented as private driver state in vc4_kms, not here. + */ + drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size); + /* Set up some arbitrary number of planes. We're not limited * by a set number of physical registers, just the space in * the HVS (16k) and how small an plane can be (28 bytes). |