diff options
author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2016-02-26 17:05:00 +0000 |
---|---|---|
committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2016-03-08 13:57:32 +0100 |
commit | 5488dc16fde74595a40c5d20ae52d978313f0b4e (patch) | |
tree | 555cde44405cfb8a773346f5673fe826f925a1a7 /drivers/gpu/drm/drm_atomic.c | |
parent | 9b8d1e53f6da63920ba569405b8d57ddbb42a988 (diff) |
drm: introduce pipe color correction properties
Patch based on a previous series by Shashank Sharma.
This introduces optional properties to enable color correction at the
pipe level. It relies on 3 transformations applied to every pixels
displayed. First a lookup into a degamma table, then a multiplication
of the rgb components by a 3x3 matrix and finally another lookup into
a gamma table.
The following properties can be added to a pipe :
- DEGAMMA_LUT : blob containing degamma LUT
- DEGAMMA_LUT_SIZE : number of elements in DEGAMMA_LUT
- CTM : transformation matrix applied after the degamma LUT
- GAMMA_LUT : blob containing gamma LUT
- GAMMA_LUT_SIZE : number of elements in GAMMA_LUT
DEGAMMA_LUT_SIZE and GAMMA_LUT_SIZE are read only properties, set by
the driver to tell userspace applications what sizes should be the
lookup tables in DEGAMMA_LUT and GAMMA_LUT.
A helper is also provided so legacy gamma correction is redirected
through these new properties.
v2: Register LUT size properties as range
v3: Fix round in drm_color_lut_get_value() helper
More docs on how degamma/gamma properties are used
v4: Update contributors
v5: Rename CTM_MATRIX property to CTM (Doh!)
Add legacy gamma_set atomic helper
Describe CTM/LUT acronyms in the kernel doc
v6: Fix missing blob unref in drm_atomic_helper_crtc_reset
Signed-off-by: Shashank Sharma <shashank.sharma@intel.com>
Signed-off-by: Kumar, Kiran S <kiran.s.kumar@intel.com>
Signed-off-by: Kausal Malladi <kausalmalladi@gmail.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Acked-by: Rob Bradford <robert.bradford@intel.com>
[danvet: CrOS maintainers are also happy with the userspacde side:
https://codereview.chromium.org/1182063002/ ]
Reviewed-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1456506302-640-4-git-send-email-lionel.g.landwerlin@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_atomic.c')
-rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 88 |
1 files changed, 86 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 8fb469c4e4b8..c7e7a955bb1e 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -28,6 +28,7 @@ #include <drm/drmP.h> #include <drm/drm_atomic.h> +#include <drm/drm_mode.h> #include <drm/drm_plane_helper.h> /** @@ -388,6 +389,59 @@ int drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, EXPORT_SYMBOL(drm_atomic_set_mode_prop_for_crtc); /** + * drm_atomic_replace_property_blob - replace a blob property + * @blob: a pointer to the member blob to be replaced + * @new_blob: the new blob to replace with + * @expected_size: the expected size of the new blob + * @replaced: whether the blob has been replaced + * + * RETURNS: + * Zero on success, error code on failure + */ +static void +drm_atomic_replace_property_blob(struct drm_property_blob **blob, + struct drm_property_blob *new_blob, + bool *replaced) +{ + struct drm_property_blob *old_blob = *blob; + + if (old_blob == new_blob) + return; + + if (old_blob) + drm_property_unreference_blob(old_blob); + if (new_blob) + drm_property_reference_blob(new_blob); + *blob = new_blob; + *replaced = true; + + return; +} + +static int +drm_atomic_replace_property_blob_from_id(struct drm_crtc *crtc, + struct drm_property_blob **blob, + uint64_t blob_id, + ssize_t expected_size, + bool *replaced) +{ + struct drm_device *dev = crtc->dev; + struct drm_property_blob *new_blob = NULL; + + if (blob_id != 0) { + new_blob = drm_property_lookup_blob(dev, blob_id); + if (new_blob == NULL) + return -EINVAL; + if (expected_size > 0 && expected_size != new_blob->length) + return -EINVAL; + } + + drm_atomic_replace_property_blob(blob, new_blob, replaced); + + return 0; +} + +/** * drm_atomic_crtc_set_property - set property on CRTC * @crtc: the drm CRTC to set a property on * @state: the state object to update with the new property value @@ -409,6 +463,7 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc, { struct drm_device *dev = crtc->dev; struct drm_mode_config *config = &dev->mode_config; + bool replaced = false; int ret; if (property == config->prop_active) @@ -419,8 +474,31 @@ int drm_atomic_crtc_set_property(struct drm_crtc *crtc, ret = drm_atomic_set_mode_prop_for_crtc(state, mode); drm_property_unreference_blob(mode); return ret; - } - else if (crtc->funcs->atomic_set_property) + } else if (property == config->degamma_lut_property) { + ret = drm_atomic_replace_property_blob_from_id(crtc, + &state->degamma_lut, + val, + -1, + &replaced); + state->color_mgmt_changed = replaced; + return ret; + } else if (property == config->ctm_property) { + ret = drm_atomic_replace_property_blob_from_id(crtc, + &state->ctm, + val, + sizeof(struct drm_color_ctm), + &replaced); + state->color_mgmt_changed = replaced; + return ret; + } else if (property == config->gamma_lut_property) { + ret = drm_atomic_replace_property_blob_from_id(crtc, + &state->gamma_lut, + val, + -1, + &replaced); + state->color_mgmt_changed = replaced; + return ret; + } else if (crtc->funcs->atomic_set_property) return crtc->funcs->atomic_set_property(crtc, state, property, val); else return -EINVAL; @@ -456,6 +534,12 @@ drm_atomic_crtc_get_property(struct drm_crtc *crtc, *val = state->active; else if (property == config->prop_mode_id) *val = (state->mode_blob) ? state->mode_blob->base.id : 0; + else if (property == config->degamma_lut_property) + *val = (state->degamma_lut) ? state->degamma_lut->base.id : 0; + else if (property == config->ctm_property) + *val = (state->ctm) ? state->ctm->base.id : 0; + else if (property == config->gamma_lut_property) + *val = (state->gamma_lut) ? state->gamma_lut->base.id : 0; else if (crtc->funcs->atomic_get_property) return crtc->funcs->atomic_get_property(crtc, state, property, val); else |