From: Peter Rosin <peda@axentia.se>
To: linux-kernel@vger.kernel.org
Cc: Peter Rosin <peda@axentia.se>,
Daniel Vetter <daniel.vetter@intel.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
Sean Paul <seanpaul@chromium.org>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org,
Lionel Landwerlin <lionel.g.landwerlin@intel.com>,
Boris Brezillon <boris.brezillon@free-electrons.com>
Subject: [PATCH v5 03/14] drm/fb-helper: separate the fb_setcmap helper into atomic and legacy paths
Date: Thu, 13 Jul 2017 18:25:27 +0200 [thread overview]
Message-ID: <20170713162538.22788-4-peda@axentia.se> (raw)
In-Reply-To: <20170713162538.22788-1-peda@axentia.se>
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>
---
drivers/gpu/drm/drm_fb_helper.c | 231 ++++++++++++++++++++++++++++------------
1 file changed, 160 insertions(+), 71 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 721511da4de6..42090fe00ef9 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -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;
@@ -1248,57 +1227,138 @@ 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;
+ int i, ret = 0;
- if (oops_in_progress)
- return -EBUSY;
+ 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;
+ if (!crtc->funcs->gamma_set || !crtc->gamma_size)
+ return -EINVAL;
- mutex_lock(&fb_helper->lock);
- if (!drm_fb_helper_is_bound(fb_helper)) {
- mutex_unlock(&fb_helper->lock);
- return -EBUSY;
+ if (cmap->start + cmap->len > crtc->gamma_size)
+ return -EINVAL;
+
+ 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));
+
+ ret = crtc->funcs->gamma_set(crtc, r, g, b,
+ crtc->gamma_size, NULL);
+ if (ret)
+ return ret;
}
+ drm_modeset_unlock_all(fb_helper->dev);
- drm_modeset_lock_all(dev);
- if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
- rc = setcmap_pseudo_palette(cmap, info);
- goto out;
+ 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;
- crtc_funcs = crtc->helper_private;
- red = cmap->red;
- green = cmap->green;
- blue = cmap->blue;
- transp = cmap->transp;
- start = cmap->start;
-
- if (!crtc->gamma_size) {
- rc = -EINVAL;
- goto out;
+ 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;
}
- if (cmap->start + cmap->len > crtc->gamma_size) {
- rc = -EINVAL;
- goto out;
+ 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;
@@ -1306,28 +1366,57 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
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);
- for (j = 0; j < cmap->len; j++) {
- u16 hred, hgreen, hblue, htransp = 0xffff;
+ return ret;
- hred = *red++;
- hgreen = *green++;
- hblue = *blue++;
+backoff:
+ drm_atomic_state_clear(state);
+ drm_modeset_backoff(&ctx);
+ goto retry;
+}
- if (transp)
- htransp = *transp++;
+/**
+ * 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;
- rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
- if (rc)
- goto out;
- }
- if (crtc_funcs->load_lut)
- crtc_funcs->load_lut(crtc);
+ if (oops_in_progress)
+ return -EBUSY;
+
+ mutex_lock(&fb_helper->lock);
+
+ if (!drm_fb_helper_is_bound(fb_helper)) {
+ ret = -EBUSY;
+ goto out;
}
- out:
- drm_modeset_unlock_all(dev);
+
+ 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);
--
2.11.0
next prev parent reply other threads:[~2017-07-13 16:29 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-13 16:25 [PATCH v5 00/14] improve the fb_setcmap helper Peter Rosin
2017-07-13 16:25 ` [PATCH v5 01/14] drm: rename, adjust and export drm_atomic_replace_property_blob Peter Rosin
2017-07-13 16:25 ` [PATCH v5 02/14] drm/atomic-helper: update lut props directly in ..._legacy_gamma_set Peter Rosin
2017-07-13 16:25 ` Peter Rosin [this message]
2017-07-14 13:54 ` [PATCH v5 03/14] drm/fb-helper: separate the fb_setcmap helper into atomic and legacy paths Daniel Vetter
2017-08-03 22:49 ` Peter Rosin
2017-08-04 9:38 ` Daniel Vetter
2017-08-04 10:30 ` [PATCH] staging: vboxvideo: remove dead gamma lut code Peter Rosin
2017-08-04 10:45 ` [RESEND PATCH] " Peter Rosin
2017-08-05 11:11 ` Hans de Goede
2017-08-07 9:21 ` Daniel Vetter
2017-08-08 11:54 ` Peter Rosin
2017-08-09 15:14 ` Daniel Vetter
2017-07-13 16:25 ` [PATCH v5 04/14] drm: amd: remove dead code and pointless local lut storage Peter Rosin
2017-07-14 14:06 ` Alex Deucher
2017-07-13 16:25 ` [PATCH v5 05/14] drm: armada: remove dead empty functions Peter Rosin
2017-07-13 16:25 ` [PATCH v5 06/14] drm: ast: remove dead code and pointless local lut storage Peter Rosin
2017-07-13 16:25 ` [PATCH v5 07/14] drm: cirrus: " Peter Rosin
2017-07-13 16:25 ` [PATCH v5 08/14] drm: gma500: " Peter Rosin
2017-07-13 16:25 ` [PATCH v5 09/14] drm: i915: " Peter Rosin
2017-07-13 16:25 ` [PATCH v5 10/14] drm: mgag200: " Peter Rosin
2017-07-13 16:25 ` [PATCH v5 11/14] drm: nouveau: " Peter Rosin
2017-07-13 16:25 ` [PATCH v5 12/14] drm: radeon: " Peter Rosin
2017-07-14 14:06 ` Alex Deucher
2017-07-13 16:25 ` [PATCH v5 13/14] drm: stm: " Peter Rosin
2017-07-17 9:47 ` Philippe CORNU
2017-07-13 16:25 ` [PATCH v5 14/14] drm: remove unused and redundant callbacks Peter Rosin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170713162538.22788-4-peda@axentia.se \
--to=peda@axentia.se \
--cc=airlied@linux.ie \
--cc=boris.brezillon@free-electrons.com \
--cc=daniel.vetter@intel.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=jani.nikula@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=lionel.g.landwerlin@intel.com \
--cc=seanpaul@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).