forked from Minki/linux
drm/fb-helper: separate the fb_setcmap helper into atomic and legacy paths
The legacy path implements setcmap in terms of crtc .gamma_set. The atomic path implements setcmap by directly updating the crtc gamma_lut property. This has a couple of benefits: - it makes the redundant fb helpers .load_lut, .gamma_set and .gamma_get completely obsolete. They are now unused and subject for removal. - atomic drivers that support clut modes get fbdev support for those from the drm core. This includes atmel-hlcdc, but perhaps others as well? Signed-off-by: Peter Rosin <peda@axentia.se> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170713162538.22788-4-peda@axentia.se
This commit is contained in:
Peter Rosin
Daniel Vetter
parent
e2b9dd304a
commit
964c60063b
@ -1195,27 +1195,6 @@ void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
|
||||
}
|
||||
EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked);
|
||||
|
||||
static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
|
||||
u16 blue, u16 regno, struct fb_info *info)
|
||||
{
|
||||
struct drm_fb_helper *fb_helper = info->par;
|
||||
struct drm_framebuffer *fb = fb_helper->fb;
|
||||
|
||||
/*
|
||||
* The driver really shouldn't advertise pseudo/directcolor
|
||||
* visuals if it can't deal with the palette.
|
||||
*/
|
||||
if (WARN_ON(!fb_helper->funcs->gamma_set ||
|
||||
!fb_helper->funcs->gamma_get))
|
||||
return -EINVAL;
|
||||
|
||||
WARN_ON(fb->format->cpp[0] != 1);
|
||||
|
||||
fb_helper->funcs->gamma_set(crtc, red, green, blue, regno);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info)
|
||||
{
|
||||
u32 *palette = (u32 *)info->pseudo_palette;
|
||||
@ -1248,56 +1227,21 @@ static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info)
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap
|
||||
* @cmap: cmap to set
|
||||
* @info: fbdev registered by the helper
|
||||
*/
|
||||
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
|
||||
static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info)
|
||||
{
|
||||
struct drm_fb_helper *fb_helper = info->par;
|
||||
struct drm_device *dev = fb_helper->dev;
|
||||
const struct drm_crtc_helper_funcs *crtc_funcs;
|
||||
u16 *red, *green, *blue, *transp;
|
||||
struct drm_crtc *crtc;
|
||||
u16 *r, *g, *b;
|
||||
int i, j, rc = 0;
|
||||
int start;
|
||||
|
||||
if (oops_in_progress)
|
||||
return -EBUSY;
|
||||
|
||||
mutex_lock(&fb_helper->lock);
|
||||
if (!drm_fb_helper_is_bound(fb_helper)) {
|
||||
mutex_unlock(&fb_helper->lock);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
drm_modeset_lock_all(dev);
|
||||
if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
|
||||
rc = setcmap_pseudo_palette(cmap, info);
|
||||
goto out;
|
||||
}
|
||||
int i, ret = 0;
|
||||
|
||||
drm_modeset_lock_all(fb_helper->dev);
|
||||
for (i = 0; i < fb_helper->crtc_count; i++) {
|
||||
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
||||
crtc_funcs = crtc->helper_private;
|
||||
if (!crtc->funcs->gamma_set || !crtc->gamma_size)
|
||||
return -EINVAL;
|
||||
|
||||
red = cmap->red;
|
||||
green = cmap->green;
|
||||
blue = cmap->blue;
|
||||
transp = cmap->transp;
|
||||
start = cmap->start;
|
||||
|
||||
if (!crtc->gamma_size) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (cmap->start + cmap->len > crtc->gamma_size) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
if (cmap->start + cmap->len > crtc->gamma_size)
|
||||
return -EINVAL;
|
||||
|
||||
r = crtc->gamma_store;
|
||||
g = r + crtc->gamma_size;
|
||||
@ -1307,27 +1251,172 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
|
||||
memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g));
|
||||
memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b));
|
||||
|
||||
for (j = 0; j < cmap->len; j++) {
|
||||
u16 hred, hgreen, hblue, htransp = 0xffff;
|
||||
|
||||
hred = *red++;
|
||||
hgreen = *green++;
|
||||
hblue = *blue++;
|
||||
|
||||
if (transp)
|
||||
htransp = *transp++;
|
||||
|
||||
rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
|
||||
if (rc)
|
||||
goto out;
|
||||
}
|
||||
if (crtc_funcs->load_lut)
|
||||
crtc_funcs->load_lut(crtc);
|
||||
ret = crtc->funcs->gamma_set(crtc, r, g, b,
|
||||
crtc->gamma_size, NULL);
|
||||
if (ret)
|
||||
return ret;
|
||||
}
|
||||
out:
|
||||
drm_modeset_unlock_all(dev);
|
||||
drm_modeset_unlock_all(fb_helper->dev);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct drm_property_blob *setcmap_new_gamma_lut(struct drm_crtc *crtc,
|
||||
struct fb_cmap *cmap)
|
||||
{
|
||||
struct drm_device *dev = crtc->dev;
|
||||
struct drm_property_blob *gamma_lut;
|
||||
struct drm_color_lut *lut;
|
||||
int size = crtc->gamma_size;
|
||||
int i;
|
||||
|
||||
if (!size || cmap->start + cmap->len > size)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
gamma_lut = drm_property_create_blob(dev, sizeof(*lut) * size, NULL);
|
||||
if (IS_ERR(gamma_lut))
|
||||
return gamma_lut;
|
||||
|
||||
lut = (struct drm_color_lut *)gamma_lut->data;
|
||||
if (cmap->start || cmap->len != size) {
|
||||
u16 *r = crtc->gamma_store;
|
||||
u16 *g = r + crtc->gamma_size;
|
||||
u16 *b = g + crtc->gamma_size;
|
||||
|
||||
for (i = 0; i < cmap->start; i++) {
|
||||
lut[i].red = r[i];
|
||||
lut[i].green = g[i];
|
||||
lut[i].blue = b[i];
|
||||
}
|
||||
for (i = cmap->start + cmap->len; i < size; i++) {
|
||||
lut[i].red = r[i];
|
||||
lut[i].green = g[i];
|
||||
lut[i].blue = b[i];
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < cmap->len; i++) {
|
||||
lut[cmap->start + i].red = cmap->red[i];
|
||||
lut[cmap->start + i].green = cmap->green[i];
|
||||
lut[cmap->start + i].blue = cmap->blue[i];
|
||||
}
|
||||
|
||||
return gamma_lut;
|
||||
}
|
||||
|
||||
static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)
|
||||
{
|
||||
struct drm_fb_helper *fb_helper = info->par;
|
||||
struct drm_device *dev = fb_helper->dev;
|
||||
struct drm_property_blob *gamma_lut = NULL;
|
||||
struct drm_modeset_acquire_ctx ctx;
|
||||
struct drm_crtc_state *crtc_state;
|
||||
struct drm_atomic_state *state;
|
||||
struct drm_crtc *crtc;
|
||||
u16 *r, *g, *b;
|
||||
int i, ret = 0;
|
||||
bool replaced;
|
||||
|
||||
drm_modeset_acquire_init(&ctx, 0);
|
||||
|
||||
state = drm_atomic_state_alloc(dev);
|
||||
if (!state) {
|
||||
ret = -ENOMEM;
|
||||
goto out_ctx;
|
||||
}
|
||||
|
||||
state->acquire_ctx = &ctx;
|
||||
retry:
|
||||
for (i = 0; i < fb_helper->crtc_count; i++) {
|
||||
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
||||
|
||||
if (!gamma_lut)
|
||||
gamma_lut = setcmap_new_gamma_lut(crtc, cmap);
|
||||
if (IS_ERR(gamma_lut)) {
|
||||
ret = PTR_ERR(gamma_lut);
|
||||
gamma_lut = NULL;
|
||||
goto out_state;
|
||||
}
|
||||
|
||||
crtc_state = drm_atomic_get_crtc_state(state, crtc);
|
||||
if (IS_ERR(crtc_state)) {
|
||||
ret = PTR_ERR(crtc_state);
|
||||
goto out_state;
|
||||
}
|
||||
|
||||
replaced = drm_property_replace_blob(&crtc_state->degamma_lut,
|
||||
NULL);
|
||||
replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
|
||||
replaced |= drm_property_replace_blob(&crtc_state->gamma_lut,
|
||||
gamma_lut);
|
||||
crtc_state->color_mgmt_changed |= replaced;
|
||||
}
|
||||
|
||||
ret = drm_atomic_commit(state);
|
||||
if (ret)
|
||||
goto out_state;
|
||||
|
||||
for (i = 0; i < fb_helper->crtc_count; i++) {
|
||||
crtc = fb_helper->crtc_info[i].mode_set.crtc;
|
||||
|
||||
r = crtc->gamma_store;
|
||||
g = r + crtc->gamma_size;
|
||||
b = g + crtc->gamma_size;
|
||||
|
||||
memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r));
|
||||
memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g));
|
||||
memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b));
|
||||
}
|
||||
|
||||
out_state:
|
||||
if (ret == -EDEADLK)
|
||||
goto backoff;
|
||||
|
||||
drm_property_blob_put(gamma_lut);
|
||||
drm_atomic_state_put(state);
|
||||
out_ctx:
|
||||
drm_modeset_drop_locks(&ctx);
|
||||
drm_modeset_acquire_fini(&ctx);
|
||||
|
||||
return ret;
|
||||
|
||||
backoff:
|
||||
drm_atomic_state_clear(state);
|
||||
drm_modeset_backoff(&ctx);
|
||||
goto retry;
|
||||
}
|
||||
|
||||
/**
|
||||
* drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap
|
||||
* @cmap: cmap to set
|
||||
* @info: fbdev registered by the helper
|
||||
*/
|
||||
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
|
||||
{
|
||||
struct drm_fb_helper *fb_helper = info->par;
|
||||
int ret;
|
||||
|
||||
if (oops_in_progress)
|
||||
return -EBUSY;
|
||||
|
||||
mutex_lock(&fb_helper->lock);
|
||||
|
||||
if (!drm_fb_helper_is_bound(fb_helper)) {
|
||||
ret = -EBUSY;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (info->fix.visual == FB_VISUAL_TRUECOLOR)
|
||||
ret = setcmap_pseudo_palette(cmap, info);
|
||||
else if (drm_drv_uses_atomic_modeset(fb_helper->dev))
|
||||
ret = setcmap_atomic(cmap, info);
|
||||
else
|
||||
ret = setcmap_legacy(cmap, info);
|
||||
|
||||
out:
|
||||
mutex_unlock(&fb_helper->lock);
|
||||
return rc;
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL(drm_fb_helper_setcmap);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user