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drm/vc4: Expose gamma as atomic property 

We are an atomic driver so the gamma LUT should also be exposed as a
CRTC property through the DRM atomic color management. This will also
take care of the legacy path for us.

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/msgid/1523479755-20812-3-git-send-email-stschake@gmail.com
This commit is contained in:
Stefan Schake 2018-04-11 22:49:13 +02:00 committed by Eric Anholt
parent aa80844042
commit 640e0c79de
1 changed files with 26 additions and 11 deletions
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37
drivers/gpu/drm/vc4/vc4_crtc.c
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@ -298,23 +298,21 @@ vc4_crtc_lut_load(struct drm_crtc *crtc)
HVS_WRITE(SCALER_GAMDATA, vc4_crtc->lut_b[i]);
}
static int
vc4_crtc_gamma_set(struct drm_crtc *crtc, u16 *r, u16 *g, u16 *b,
uint32_t size,
struct drm_modeset_acquire_ctx *ctx)
static void
vc4_crtc_update_gamma_lut(struct drm_crtc *crtc)
{
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_color_lut *lut = crtc->state->gamma_lut->data;
u32 length = drm_color_lut_size(crtc->state->gamma_lut);
u32 i;
for (i = 0; i < size; i++) {
vc4_crtc->lut_r[i] = r[i] >> 8;
vc4_crtc->lut_g[i] = g[i] >> 8;
vc4_crtc->lut_b[i] = b[i] >> 8;
for (i = 0; i < length; i++) {
vc4_crtc->lut_r[i] = drm_color_lut_extract(lut[i].red, 8);
vc4_crtc->lut_g[i] = drm_color_lut_extract(lut[i].green, 8);
vc4_crtc->lut_b[i] = drm_color_lut_extract(lut[i].blue, 8);
}
vc4_crtc_lut_load(crtc);
return 0;
}
static u32 vc4_get_fifo_full_level(u32 format)
@ -699,6 +697,22 @@ static void vc4_crtc_atomic_flush(struct drm_crtc *crtc,
if (crtc->state->active && old_state->active)
vc4_crtc_update_dlist(crtc);
if (crtc->state->color_mgmt_changed) {
u32 dispbkgndx = HVS_READ(SCALER_DISPBKGNDX(vc4_crtc->channel));
if (crtc->state->gamma_lut) {
vc4_crtc_update_gamma_lut(crtc);
dispbkgndx |= SCALER_DISPBKGND_GAMMA;
} else {
/* Unsetting DISPBKGND_GAMMA skips the gamma lut step
* in hardware, which is the same as a linear lut that
* DRM expects us to use in absence of a user lut.
*/
dispbkgndx &= ~SCALER_DISPBKGND_GAMMA;
}
HVS_WRITE(SCALER_DISPBKGNDX(vc4_crtc->channel), dispbkgndx);
}
if (debug_dump_regs) {
DRM_INFO("CRTC %d HVS after:\n", drm_crtc_index(crtc));
vc4_hvs_dump_state(dev);
@ -909,7 +923,7 @@ static const struct drm_crtc_funcs vc4_crtc_funcs = {
.reset = vc4_crtc_reset,
.atomic_duplicate_state = vc4_crtc_duplicate_state,
.atomic_destroy_state = vc4_crtc_destroy_state,
.gamma_set = vc4_crtc_gamma_set,
.gamma_set = drm_atomic_helper_legacy_gamma_set,
.enable_vblank = vc4_enable_vblank,
.disable_vblank = vc4_disable_vblank,
};
@ -1035,6 +1049,7 @@ static int vc4_crtc_bind(struct device *dev, struct device *master, void *data)
primary_plane->crtc = crtc;
vc4_crtc->channel = vc4_crtc->data->hvs_channel;
drm_mode_crtc_set_gamma_size(crtc, ARRAY_SIZE(vc4_crtc->lut_r));
drm_crtc_enable_color_mgmt(crtc, 0, false, 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