Hi Noralf.
I have read through the cahnes a copuple of times not and feel confident
to add my r-b if the comments are considered.
On Mon, May 06, 2019 at 08:01:33PM +0200, Noralf Trønnes wrote:
> It now only contains the modeset so use that directly instead and attach
> a modeset array to drm_client_dev. drm_fb_helper will use this array.
> Code will later be moved to drm_client, so add code there in a new file
> drm_client_modeset.c with MIT license to match drm_fb_helper.c.
The first part of this commit log could use some re-pharsing.
What is "It" etc.
> @@ -92,14 +91,20 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client,
> client->name = name;
> client->funcs = funcs;
>
> - ret = drm_client_open(client);
> + ret = drm_client_modeset_create(client);
> if (ret)
> goto err_put_module;
>
> + ret = drm_client_open(client);
> + if (ret)
> + goto err_free;
> +
> drm_dev_get(dev);
>
> return 0;
>
> +err_free:
> + drm_client_modeset_free(client);
> err_put_module:
> if (funcs)
> module_put(funcs->owner);
> @@ -148,6 +153,7 @@ void drm_client_release(struct drm_client_dev *client)
>
> DRM_DEV_DEBUG_KMS(dev->dev, "%s\n", client->name);
>
> + drm_client_modeset_free(client);
> drm_client_close(client);
> drm_dev_put(dev);
If the order should be the opposite of init then call drm_client_close() before
drm_client_modeset_free()
> if (client->funcs)
> + drm_client_for_each_modeset(mode_set, client) {
> struct drm_plane *primary = mode_set->crtc->primary;
> unsigned int rotation;
>
> @@ -517,9 +518,11 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ
>
> static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper)
> {
> + struct drm_client_dev *client = &fb_helper->client;
> struct drm_device *dev = fb_helper->dev;
> + struct drm_mode_set *mode_set;
> struct drm_plane *plane;
> - int i, ret = 0;
> + int ret = 0;
>
> drm_modeset_lock_all(fb_helper->dev);
> drm_for_each_plane(plane, dev) {
> @@ -532,8 +535,7 @@ static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper)
> DRM_MODE_ROTATE_0);
> }
>
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
> + drm_client_for_each_modeset(mode_set, client) {
> struct drm_crtc *crtc = mode_set->crtc;
>
> if (crtc->funcs->cursor_set2) {
This function requires modeset_mutex to be held. Maybe add comment?
> @@ -682,15 +689,14 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
>
> static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode)
> {
> + struct drm_client_dev *client = &fb_helper->client;
> struct drm_device *dev = fb_helper->dev;
> struct drm_connector *connector;
> struct drm_mode_set *modeset;
> - int i, j;
> + int j;
>
> drm_modeset_lock_all(dev);
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - modeset = &fb_helper->crtc_info[i].mode_set;
> -
> + drm_client_for_each_modeset(modeset, client) {
> if (!modeset->crtc->enabled)
> continue;
>
This function needs modeset_mutex - maybe add comment?
> @@ -1390,13 +1353,14 @@ static int setcmap_pseudo_palette(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_mode_set *modeset;
> struct drm_crtc *crtc;
> u16 *r, *g, *b;
> - int i, ret = 0;
> + int 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;
> + drm_client_for_each_modeset(modeset, &fb_helper->client) {
> + crtc = modeset->crtc;
> if (!crtc->funcs->gamma_set || !crtc->gamma_size)
> return -EINVAL;
>
This function needs modeset_mutex - maybe add comment?
> @@ -1472,10 +1436,11 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)
> struct drm_modeset_acquire_ctx ctx;
> struct drm_crtc_state *crtc_state;
> struct drm_atomic_state *state;
> + struct drm_mode_set *modeset;
> struct drm_crtc *crtc;
> u16 *r, *g, *b;
> - int i, ret = 0;
> bool replaced;
> + int ret = 0;
>
> drm_modeset_acquire_init(&ctx, 0);
>
> @@ -1487,8 +1452,8 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)
>
> state->acquire_ctx = &ctx;
> retry:
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - crtc = fb_helper->crtc_info[i].mode_set.crtc;
> + drm_client_for_each_modeset(modeset, &fb_helper->client) {
> + crtc = modeset->crtc;
>
> if (!gamma_lut)
> gamma_lut = setcmap_new_gamma_lut(crtc, cmap);
> @@ -1516,8 +1481,8 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)
> if (ret)
> goto out_state;
>
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - crtc = fb_helper->crtc_info[i].mode_set.crtc;
> + drm_client_for_each_modeset(modeset, &fb_helper->client) {
> + crtc = modeset->crtc;
>
> r = crtc->gamma_store;
> g = r + crtc->gamma_size;
This function needs modeset_mutex - maybe add comment?
> @@ -1567,12 +1532,14 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
> goto unlock;
> }
>
> + mutex_lock(&fb_helper->client.modeset_mutex);
> 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);
> + mutex_unlock(&fb_helper->client.modeset_mutex);
>
> drm_master_internal_release(dev);
> unlock:
> @@ -1596,7 +1563,6 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
> {
> struct drm_fb_helper *fb_helper = info->par;
> struct drm_device *dev = fb_helper->dev;
> - struct drm_mode_set *mode_set;
> struct drm_crtc *crtc;
> int ret = 0;
>
> @@ -1624,8 +1590,7 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
> * make. If we're not smart enough here, one should
> * just consider switch the userspace to KMS.
> */
> - mode_set = &fb_helper->crtc_info[0].mode_set;
> - crtc = mode_set->crtc;
> + crtc = fb_helper->client.modesets[0].crtc;
>
> /*
> * Only wait for a vblank event if the CRTC is
> @@ -1822,16 +1787,14 @@ EXPORT_SYMBOL(drm_fb_helper_set_par);
>
> static void pan_set(struct drm_fb_helper *fb_helper, int x, int y)
> {
> - int i;
> -
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - struct drm_mode_set *mode_set;
> -
> - mode_set = &fb_helper->crtc_info[i].mode_set;
> + struct drm_mode_set *mode_set;
>
> + mutex_lock(&fb_helper->client.modeset_mutex);
> + drm_client_for_each_modeset(mode_set, &fb_helper->client) {
> mode_set->x = x;
> mode_set->y = y;
> }
> + mutex_unlock(&fb_helper->client.modeset_mutex);
> }
>
> static int pan_display_atomic(struct fb_var_screeninfo *var,
> @@ -1842,7 +1805,7 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,
>
> pan_set(fb_helper, var->xoffset, var->yoffset);
>
> - ret = restore_fbdev_mode_atomic(fb_helper, true);
> + ret = restore_fbdev_mode_force(fb_helper);
This change looks alien compared to other changes.
Does it belong to this patchset?
> if (!ret) {
> info->var.xoffset = var->xoffset;
> info->var.yoffset = var->yoffset;
> @@ -1856,14 +1819,13 @@ static int pan_display_legacy(struct fb_var_screeninfo *var,
> struct fb_info *info)
> {
> struct drm_fb_helper *fb_helper = info->par;
> + struct drm_client_dev *client = &fb_helper->client;
> struct drm_mode_set *modeset;
> int ret = 0;
> - int i;
>
> drm_modeset_lock_all(fb_helper->dev);
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - modeset = &fb_helper->crtc_info[i].mode_set;
> -
> + mutex_lock(&client->modeset_mutex);
> + drm_client_for_each_modeset(modeset, client) {
> modeset->x = var->xoffset;
> modeset->y = var->yoffset;
>
> @@ -1875,6 +1837,7 @@ static int pan_display_legacy(struct fb_var_screeninfo *var,
> }
> }
> }
> + mutex_unlock(&client->modeset_mutex);
> drm_modeset_unlock_all(fb_helper->dev);
>
> return ret;
> @@ -1921,10 +1884,12 @@ EXPORT_SYMBOL(drm_fb_helper_pan_display);
> static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
> int preferred_bpp)
> {
> + struct drm_client_dev *client = &fb_helper->client;
> int ret = 0;
> int crtc_count = 0;
> int i;
> struct drm_fb_helper_surface_size sizes;
> + struct drm_mode_set *mode_set;
> int best_depth = 0;
>
> memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
> @@ -1975,13 +1940,13 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
> * supports RGBA5551 (16 bpp, depth 15) but not RGB565 (16 bpp, depth
> * 16) we need to scale down the depth of the sizes we request.
> */
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set;
> + mutex_lock(&client->modeset_mutex);
> + drm_client_for_each_modeset(mode_set, client) {
> struct drm_crtc *crtc = mode_set->crtc;
> struct drm_plane *plane = crtc->primary;
> int j;
>
> - DRM_DEBUG("test CRTC %d primary plane\n", i);
> + DRM_DEBUG("test CRTC %u primary plane\n", drm_crtc_index(crtc));
>
> for (j = 0; j < plane->format_count; j++) {
> const struct drm_format_info *fmt;
> @@ -2021,9 +1986,8 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
>
> /* first up get a count of crtcs now in use and new min/maxes width/heights */
> crtc_count = 0;
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> + drm_client_for_each_modeset(mode_set, client) {
> struct drm_display_mode *desired_mode;
> - struct drm_mode_set *mode_set;
> int x, y, j;
> /* in case of tile group, are we the last tile vert or horiz?
> * If no tile group you are always the last one both vertically
> @@ -2031,7 +1995,6 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
> */
> bool lastv = true, lasth = true;
>
> - mode_set = &fb_helper->crtc_info[i].mode_set;
> desired_mode = mode_set->mode;
>
> if (!desired_mode)
> @@ -2061,6 +2024,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
> if (lastv)
> sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height);
> }
> + mutex_unlock(&client->modeset_mutex);
>
> if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
> DRM_INFO("Cannot find any crtc or sizes\n");
> @@ -2292,7 +2256,7 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
> struct drm_display_mode *dmt_mode, *mode;
>
> /* only contemplate cloning in the single crtc case */
> - if (fb_helper->crtc_count > 1)
> + if (fb_helper->dev->mode_config.num_crtc > 1)
> return false;
>
> count = 0;
> @@ -2481,15 +2445,17 @@ static bool connector_has_possible_crtc(struct drm_connector *connector,
> }
>
> static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> - struct drm_fb_helper_crtc **best_crtcs,
> + struct drm_crtc **best_crtcs,
> struct drm_display_mode **modes,
> int n, int width, int height)
> {
> - int c, o;
> + struct drm_client_dev *client = &fb_helper->client;
> struct drm_connector *connector;
> int my_score, best_score, score;
> - struct drm_fb_helper_crtc **crtcs, *crtc;
> + struct drm_crtc **crtcs, *crtc;
> + struct drm_mode_set *modeset;
> struct drm_fb_helper_connector *fb_helper_conn;
> + int o;
>
> if (n == fb_helper->connector_count)
> return 0;
drm_pick_crtcs() needs the modeset mutex.
And due considering the complexity of the function it would be nice
to have this fact documented.
> @@ -2502,8 +2468,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> if (modes[n] == NULL)
> return best_score;
>
> - crtcs = kcalloc(fb_helper->connector_count,
> - sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
> + crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL);
> if (!crtcs)
> return best_score;
>
> @@ -2519,11 +2484,10 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> * select a crtc for this connector and then attempt to configure
> * remaining connectors
> */
> - for (c = 0; c < fb_helper->crtc_count; c++) {
> - crtc = &fb_helper->crtc_info[c];
> + drm_client_for_each_modeset(modeset, client) {
> + crtc = modeset->crtc;
>
> - if (!connector_has_possible_crtc(connector,
> - crtc->mode_set.crtc))
> + if (!connector_has_possible_crtc(connector, crtc))
> continue;
>
> for (o = 0; o < n; o++)
> @@ -2532,7 +2496,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
>
> if (o < n) {
> /* ignore cloning unless only a single crtc */
> - if (fb_helper->crtc_count > 1)
> + if (fb_helper->dev->mode_config.num_crtc > 1)
> continue;
>
> if (!drm_mode_equal(modes[o], modes[n]))
> @@ -2540,14 +2504,13 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> }
>
> crtcs[n] = crtc;
> - memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
> + memcpy(crtcs, best_crtcs, n * sizeof(*crtcs));
> score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
> width, height);
> if (score > best_score) {
> best_score = score;
> memcpy(best_crtcs, crtcs,
> - fb_helper->connector_count *
> - sizeof(struct drm_fb_helper_crtc *));
> + fb_helper->connector_count * sizeof(*crtcs));
> }
> }
>
> @@ -2555,21 +2518,9 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
> return best_score;
> }
>
> -static struct drm_fb_helper_crtc *
> -drm_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
> -{
> - int i;
> -
> - for (i = 0; i < fb_helper->crtc_count; i++)
> - if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
> - return &fb_helper->crtc_info[i];
> -
> - return NULL;
> -}
> -
> /* Try to read the BIOS display configuration and use it for the initial config */
> static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
> - struct drm_fb_helper_crtc **crtcs,
> + struct drm_crtc **crtcs,
> struct drm_display_mode **modes,
> struct drm_fb_offset *offsets,
> bool *enabled, int width, int height)
> @@ -2605,7 +2556,7 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
> struct drm_fb_helper_connector *fb_conn;
> struct drm_connector *connector;
> struct drm_encoder *encoder;
> - struct drm_fb_helper_crtc *new_crtc;
> + struct drm_crtc *new_crtc;
>
> fb_conn = fb_helper->connector_info[i];
> connector = fb_conn->connector;
> @@ -2647,7 +2598,7 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
>
> num_connectors_enabled++;
>
> - new_crtc = drm_fb_helper_crtc(fb_helper, connector->state->crtc);
> + new_crtc = connector->state->crtc;
>
> /*
> * Make sure we're not trying to drive multiple connectors
> @@ -2747,10 +2698,11 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,
> static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> u32 width, u32 height)
> {
> + struct drm_client_dev *client = &fb_helper->client;
> struct drm_device *dev = fb_helper->dev;
> - struct drm_fb_helper_crtc **crtcs;
> struct drm_display_mode **modes;
> struct drm_fb_offset *offsets;
> + struct drm_crtc **crtcs;
> bool *enabled;
> int i;
>
> @@ -2758,8 +2710,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> /* prevent concurrent modification of connector_count by hotplug */
> lockdep_assert_held(&fb_helper->lock);
>
> - crtcs = kcalloc(fb_helper->connector_count,
> - sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
> + crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL);
> modes = kcalloc(fb_helper->connector_count,
> sizeof(struct drm_display_mode *), GFP_KERNEL);
> offsets = kcalloc(fb_helper->connector_count,
> @@ -2771,6 +2722,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> goto out;
> }
>
> + mutex_lock(&client->modeset_mutex);
> +
> mutex_lock(&fb_helper->dev->mode_config.mutex);
> if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0)
> DRM_DEBUG_KMS("No connectors reported connected with modes\n");
> @@ -2795,24 +2748,24 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> }
> mutex_unlock(&fb_helper->dev->mode_config.mutex);
>
> - /* need to set the modesets up here for use later */
> - /* fill out the connector<->crtc mappings into the modesets */
> - for (i = 0; i < fb_helper->crtc_count; i++)
> - drm_fb_helper_modeset_release(fb_helper,
> - &fb_helper->crtc_info[i].mode_set);
> + drm_client_modeset_release(client);
>
> drm_fb_helper_for_each_connector(fb_helper, i) {
> struct drm_display_mode *mode = modes[i];
> - struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
> + struct drm_crtc *crtc = crtcs[i];
> struct drm_fb_offset *offset = &offsets[i];
>
> - if (mode && fb_crtc) {
> - struct drm_mode_set *modeset = &fb_crtc->mode_set;
> + if (mode && crtc) {
> + struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc);
> struct drm_connector *connector =
> fb_helper->connector_info[i]->connector;
>
> DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n",
> - mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y);
> + mode->name, crtc->base.id, offset->x, offset->y);
> +
> + if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS ||
> + (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1)))
> + break;
>
> modeset->mode = drm_mode_duplicate(dev, mode);
> drm_connector_get(connector);
> @@ -2821,6 +2774,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> modeset->y = offset->y;
> }
> }
> +
> + mutex_unlock(&client->modeset_mutex);
> out:
> kfree(crtcs);
> kfree(modes);
> @@ -2837,13 +2792,14 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> */
> static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
> {
> + struct drm_client_dev *client = &fb_helper->client;
> struct fb_info *info = fb_helper->fbdev;
> unsigned int rotation, sw_rotations = 0;
> + struct drm_mode_set *modeset;
> int i;
>
> - for (i = 0; i < fb_helper->crtc_count; i++) {
> - struct drm_mode_set *modeset = &fb_helper->crtc_info[i].mode_set;
> -
> + mutex_lock(&client->modeset_mutex);
> + drm_client_for_each_modeset(modeset, client) {
> if (!modeset->num_connectors)
> continue;
>
> @@ -2855,6 +2811,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)
> else
> sw_rotations |= rotation;
> }
> + mutex_unlock(&client->modeset_mutex);
>
> mutex_lock(&fb_helper->dev->mode_config.mutex);
> drm_fb_helper_for_each_connector(fb_helper, i) {
> @@ -3071,8 +3028,7 @@ EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
> * @funcs: fbdev helper functions
> * @preferred_bpp: Preferred bits per pixel for the device.
> * @dev->mode_config.preferred_depth is used if this is zero.
> - * @max_conn_count: Maximum number of connectors.
> - * @dev->mode_config.num_connector is used if this is zero.
> + * @max_conn_count: Maximum number of connectors (not used)
> *
> * This function sets up fbdev emulation and registers fbdev for access by
> * userspace. If all connectors are disconnected, setup is deferred to the next
> @@ -3100,16 +3056,9 @@ int drm_fb_helper_fbdev_setup(struct drm_device *dev,
> if (!preferred_bpp)
> preferred_bpp = 32;
>
> - if (!max_conn_count)
> - max_conn_count = dev->mode_config.num_connector;
> - if (!max_conn_count) {
> - DRM_DEV_ERROR(dev->dev, "fbdev: No connectors\n");
> - return -EINVAL;
> - }
> -
> drm_fb_helper_prepare(dev, fb_helper, funcs);
>
> - ret = drm_fb_helper_init(dev, fb_helper, max_conn_count);
> + ret = drm_fb_helper_init(dev, fb_helper, 0);
> if (ret < 0) {
> DRM_DEV_ERROR(dev->dev, "fbdev: Failed to initialize (ret=%d)\n", ret);
> return ret;
> @@ -3422,7 +3371,7 @@ static int drm_fbdev_client_hotplug(struct drm_client_dev *client)
>
> drm_fb_helper_prepare(dev, fb_helper, &drm_fb_helper_generic_funcs);
>
> - ret = drm_fb_helper_init(dev, fb_helper, dev->mode_config.num_connector);
> + ret = drm_fb_helper_init(dev, fb_helper, 0);
> if (ret)
> goto err;
>
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