Hi
Am 07.04.19 um 18:52 schrieb Noralf Trønnes:
> It is generic code and having it in the helper will let other drivers
> benefit from it.
>
> One change was necessary assuming this to be true:
> INTEL_INFO(dev_priv)->num_pipes == dev->mode_config.num_crtc
>
> Suggested-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
> Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_fb_helper.c | 194 ++++++++++++++++++++++++-
> drivers/gpu/drm/i915/intel_fbdev.c | 218 -----------------------------
> include/drm/drm_fb_helper.h | 23 ---
> 3 files changed, 190 insertions(+), 245 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index a6be09ae899b..eda8b63f350d 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -2556,6 +2556,194 @@ static void drm_setup_crtc_rotation(struct drm_fb_helper *fb_helper,
> fb_helper->sw_rotations |= DRM_MODE_ROTATE_0;
> }
>
> +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_display_mode **modes,
> + struct drm_fb_offset *offsets,
> + bool *enabled, int width, int height)
> +{
> + struct drm_device *dev = fb_helper->dev;
> + unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
> + unsigned long conn_configured, conn_seq;
> + int i, j;
> + bool *save_enabled;
> + bool fallback = true, ret = true;
> + int num_connectors_enabled = 0;
> + int num_connectors_detected = 0;
> + struct drm_modeset_acquire_ctx ctx;
> +
> + save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
> + if (!save_enabled)
> + return false;
> +
> + drm_modeset_acquire_init(&ctx, 0);
> +
> + while (drm_modeset_lock_all_ctx(dev, &ctx) != 0)
> + drm_modeset_backoff(&ctx);
> +
> + memcpy(save_enabled, enabled, count);
> + conn_seq = GENMASK(count - 1, 0);
> + conn_configured = 0;
> +retry:
> + for (i = 0; i < count; i++) {
> + struct drm_fb_helper_connector *fb_conn;
> + struct drm_connector *connector;
> + struct drm_encoder *encoder;
> + struct drm_fb_helper_crtc *new_crtc;
> +
> + fb_conn = fb_helper->connector_info[i];
> + connector = fb_conn->connector;
> +
> + if (conn_configured & BIT(i))
> + continue;
> +
> + /* First pass, only consider tiled connectors */
> + if (conn_seq == GENMASK(count - 1, 0) && !connector->has_tile)
> + continue;
> +
> + if (connector->status == connector_status_connected)
> + num_connectors_detected++;
> +
> + if (!enabled[i]) {
> + DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
> + connector->name);
> + conn_configured |= BIT(i);
> + continue;
> + }
> +
> + if (connector->force == DRM_FORCE_OFF) {
> + DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
> + connector->name);
> + enabled[i] = false;
> + continue;
> + }
> +
> + encoder = connector->state->best_encoder;
This patch breaks ast right here. Ast is a non-atomic driver and has
connector->state set to NULL. Reading best_encoder gives a NULL-pointer
dereference and the display turns black. Stack trace is below.
Best regards
Thomas
[ 29.583012] [drm:drm_fb_helper_firmware_config.isra.37
[drm_kms_helper]] *ERROR* drivers/gpu/drm/drm_fb_helper.c:2649
connector=00000000db73d0b1
[ 29.583048] [drm:drm_fb_helper_firmware_config.isra.37
[drm_kms_helper]] *ERROR* drivers/gpu/drm/drm_fb_helper.c:2650
connector->state= (null)
0m] Found device[ 29.609593] BUG: unable to handle kernel NULL pointer
dereference at 0000000000000010
[ 29.609594] #PF error: [normal kernel read fault]
[ 29.609595] PGD 0 P4D 0
[ 29.609597] Oops: 0000 [#1] SMP PTI
[ 29.609599] CPU: 1 PID: 354 Comm: systemd-udevd Tainted: G
E 5.1.0-rc5-1-default+ #11
[ 29.609600] Hardware name: Sun Microsystems SUN FIRE X2270 M2/SUN
FIRE X2270 M2, BIOS 2.05 07/01/2010
[ 29.609608] RIP:
0010:drm_fb_helper_firmware_config.isra.37+0x2d6/0x8a0 [drm_kms_helper]
[ 29.609609] Code: 48 89 de ba 5a 0a 00 00 48 c7 c7 5b 0b 48 c0 e8 60
d1 17 00 48 8b 85 e0 03 00 00 48 89 de ba 5b 0a 00 00 48 c7 c7 90 ef 47
c0 <48> 8b 48 10 e8 41 d1 17 00 ba 5d 0a 00 00 48 89 de 4c 89 ef 4b
[ 29.609610] RSP: 0018:ffffb6f800c3f898 EFLAGS: 00010296
[ 29.609612] RAX: 0000000000000000 RBX: ffffffffc047eec0 RCX:
0000000000000000
[ 29.609612] RDX: 0000000000000a5b RSI: ffffffffc047eec0 RDI:
ffffffffc047ef90
[ 29.609613] RBP: ffff9e76b6e42800 R08: 0000000000000002 R09:
0000000000000000
[ 29.609614] R10: 00000000009053e2 R11: 0000000000002ae7 R12:
0000000000000000
[ 29.609615] R13: ffffffffc0480b40 R14: 0000000000000000 R15:
ffff9e76b5bcac00
[ 29.609616] FS: 00007f147397ef80(0000) GS:ffff9e76bb640000(0000)
knlGS:0000000000000000
[ 29.609617] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 29.609618] CR2: 0000000000000010 CR3: 0000000135bd2002 CR4:
00000000000206e0
[ 29.609619] Call Trace:
[ 29.609630] ? drm_helper_probe_single_connector_modes+0x27f/0x680
[drm_kms_helper]
[ 29.609640] drm_setup_crtcs+0x431/0xd80 [drm_kms_helper]
[ 29.753065] __drm_fb_helper_initial_config_and_unlock+0x6f/0x6a0
[drm_kms_helper]
[ 29.753160] ? drm_modeset_unlock_all+0x31/0x50 [drm]
ST1000[ 29.765758] ast_fbdev_init+0xa8/0xc0 [ast]
[ 29.765762] ast_driver_load.cold.7+0x2b3/0xe11 [ast]
[ 29.765775] drm_dev_register+0x111/0x150 [drm]
[ 29.765790] drm_get_pci_dev+0x95/0x190 [drm]
[ 29.765794] local_pci_probe+0x42/0x80
[ 29.765796] pci_device_probe+0xf4/0x170
[ 29.765800] really_probe+0xf8/0x3b0
[ 29.765802] driver_probe_device+0xb3/0xf0
[ 29.765805] device_driver_attach+0x50/0x60
[ 29.805092] __driver_attach+0x86/0x140
[ 29.805095] ? device_driver_attach+0x60/0x60
[ 29.805138] bus_for_each_dev+0x63/0x90
DM010-2EP102 4 29.817250] bus_add_driver+0x131/0x1e0
[ 29.817252] ? 0xffffffffc03e6000
0m.
[ 29.817254] driver_register+0x6b/0xb0
[ 29.817255] ? 0xffffffffc03e6000
[ 29.817258] do_one_initcall+0x46/0x1c8
[ 29.817262] ? __vunmap+0x89/0xc0
[ 29.817265] do_init_module+0x5a/0x210
[ 29.817266] load_module+0x1aff/0x1f70
[ 29.817270] ? __do_sys_finit_module+0x8f/0xd0
[ 29.817271] __do_sys_finit_module+0x8f/0xd0
[ 29.817274] do_syscall_64+0x60/0x110
[ 29.817279] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 29.817280] RIP: 0033:0x7f147428b2f9
[ 29.817282] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f
05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 6f 4b 0c 00 f7 d8 64 89 08
[ 29.817282] RSP: 002b:00007fffa8cd4478 EFLAGS: 00000246 ORIG_RAX:
0000000000000139
[ 29.817284] RAX: ffffffffffffffda RBX: 0000561801fe62e0 RCX:
00007f147428b2f9
[ 29.817285] RDX: 0000000000000000 RSI: 00007f147440089d RDI:
0000000000000016
[ 29.817285] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000561801ffcd50
[ 29.817286] R10: 0000000000000016 R11: 0000000000000246 R12:
00007f147440089d
[ 29.817287] R13: 0000000000020000 R14: 0000561802006510 R15:
0000561801fe62e0
[ 29.817288] Modules linked in: hid_generic(E) btrfs(E) libcrc32c(E)
usbhid(E) xor(E) ast(E+) i2c_algo_bit(E) drm_kms_helper(E)
syscopyarea(E) sysfillrect(E) sysimgblt(E) fb_sys_fops(E) ehci_pci(E)
drm_vram_h)
[ 29.817300] CR2: 0000000000000010
[ 29.817311] ---[ end trace 640b47541cd2e101 ]---
[ 29.827577] PM: Image not found (code -22)
[ 29.830117] RIP:
0010:drm_fb_helper_firmware_config.isra.37+0x2d6/0x8a0 [drm_kms_helper]
[ 29.985828] Code: 48 89 de ba 5a 0a 00 00 48 c7 c7 5b 0b 48 c0 e8 60
d1 17 00 48 8b 85 e0 03 00 00 48 89 de ba 5b 0a 00 00 48 c7 c7 90 ef 47
c0 <48> 8b 48 10 e8 41 d1 17 00 ba 5d 0a 00 00 48 89 de 4c 89 ef 4b
[ 29.985829] RSP: 0018:ffffb6f800c3f898 EFLAGS: 00010296
[ 29.985830] RAX: 0000000000000000 RBX: ffffffffc047eec0 RCX:
0000000000000000
[ 29.985831] RDX: 0000000000000a5b RSI: ffffffffc047eec0 RDI:
ffffffffc047ef90
[ 29.985832] RBP: ffff9e76b6e42800 R08: 0000000000000002 R09:
0000000000000000
[ 29.985834] R10: 00000000009053e2 R11: 0000000000002ae7 R12:
0000000000000000
[ 30.038589] R13: ffffffffc0480b40 R14: 0000000000000000 R15:
ffff9e76b5bcac00
[ 30.038590] FS: 00007f147397ef80(0000) GS:ffff9e76bb640000(0000)
knlGS:0000000000000000
[ 30.038591] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 30.038592] CR2: 0000000000000010 CR3: 0000000135bd2002 CR4:
00000000000206e0
> + if (!encoder || WARN_ON(!connector->state->crtc)) {
> + if (connector->force > DRM_FORCE_OFF)
> + goto bail;
> +
> + DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
> + connector->name);
> + enabled[i] = false;
> + conn_configured |= BIT(i);
> + continue;
> + }
> +
> + num_connectors_enabled++;
> +
> + new_crtc = drm_fb_helper_crtc(fb_helper, connector->state->crtc);
> +
> + /*
> + * Make sure we're not trying to drive multiple connectors
> + * with a single CRTC, since our cloning support may not
> + * match the BIOS.
> + */
> + for (j = 0; j < count; j++) {
> + if (crtcs[j] == new_crtc) {
> + DRM_DEBUG_KMS("fallback: cloned configuration\n");
> + goto bail;
> + }
> + }
> +
> + DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
> + connector->name);
> +
> + /* go for command line mode first */
> + modes[i] = drm_pick_cmdline_mode(fb_conn);
> +
> + /* try for preferred next */
> + if (!modes[i]) {
> + DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
> + connector->name, connector->has_tile);
> + modes[i] = drm_has_preferred_mode(fb_conn, width,
> + height);
> + }
> +
> + /* No preferred mode marked by the EDID? Are there any modes? */
> + if (!modes[i] && !list_empty(&connector->modes)) {
> + DRM_DEBUG_KMS("using first mode listed on connector %s\n",
> + connector->name);
> + modes[i] = list_first_entry(&connector->modes,
> + struct drm_display_mode,
> + head);
> + }
> +
> + /* last resort: use current mode */
> + if (!modes[i]) {
> + /*
> + * IMPORTANT: We want to use the adjusted mode (i.e.
> + * after the panel fitter upscaling) as the initial
> + * config, not the input mode, which is what crtc->mode
> + * usually contains. But since our current
> + * code puts a mode derived from the post-pfit timings
> + * into crtc->mode this works out correctly.
> + *
> + * This is crtc->mode and not crtc->state->mode for the
> + * fastboot check to work correctly.
> + */
> + DRM_DEBUG_KMS("looking for current mode on connector %s\n",
> + connector->name);
> + modes[i] = &connector->state->crtc->mode;
> + }
> + crtcs[i] = new_crtc;
> +
> + DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
> + connector->name,
> + connector->state->crtc->base.id,
> + connector->state->crtc->name,
> + modes[i]->hdisplay, modes[i]->vdisplay,
> + modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : "");
> +
> + fallback = false;
> + conn_configured |= BIT(i);
> + }
> +
> + if (conn_configured != conn_seq) { /* repeat until no more are found */
> + conn_seq = conn_configured;
> + goto retry;
> + }
> +
> + /*
> + * If the BIOS didn't enable everything it could, fall back to have the
> + * same user experiencing of lighting up as much as possible like the
> + * fbdev helper library.
> + */
> + if (num_connectors_enabled != num_connectors_detected &&
> + num_connectors_enabled < dev->mode_config.num_crtc) {
> + DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
> + DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
> + num_connectors_detected);
> + fallback = true;
> + }
> +
> + if (fallback) {
> +bail:
> + DRM_DEBUG_KMS("Not using firmware configuration\n");
> + memcpy(enabled, save_enabled, count);
> + ret = false;
> + }
> +
> + drm_modeset_drop_locks(&ctx);
> + drm_modeset_acquire_fini(&ctx);
> +
> + kfree(save_enabled);
> + return ret;
> +}
> +
> static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> u32 width, u32 height)
> {
> @@ -2588,10 +2776,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper,
> DRM_DEBUG_KMS("No connectors reported connected with modes\n");
> drm_enable_connectors(fb_helper, enabled);
>
> - if (!(fb_helper->funcs->initial_config &&
> - fb_helper->funcs->initial_config(fb_helper, crtcs, modes,
> - offsets,
> - enabled, width, height))) {
> + if (!drm_fb_helper_firmware_config(fb_helper, crtcs, modes, offsets,
> + enabled, width, height)) {
> memset(modes, 0, fb_helper->connector_count*sizeof(modes[0]));
> memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0]));
> memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0]));
> diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
> index ef93c27e60b4..c4d17dda3355 100644
> --- a/drivers/gpu/drm/i915/intel_fbdev.c
> +++ b/drivers/gpu/drm/i915/intel_fbdev.c
> @@ -284,225 +284,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
> return ret;
> }
>
> -static struct drm_fb_helper_crtc *
> -intel_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
> - * fb configuration.
> - *
> - * The BIOS or boot loader will generally create an initial display
> - * configuration for us that includes some set of active pipes and displays.
> - * This routine tries to figure out which pipes and connectors are active
> - * and stuffs them into the crtcs and modes array given to us by the
> - * drm_fb_helper code.
> - *
> - * The overall sequence is:
> - * intel_fbdev_init - from driver load
> - * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
> - * drm_fb_helper_init - build fb helper structs
> - * drm_fb_helper_single_add_all_connectors - more fb helper structs
> - * intel_fbdev_initial_config - apply the config
> - * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
> - * drm_setup_crtcs - build crtc config for fbdev
> - * intel_fb_initial_config - find active connectors etc
> - * drm_fb_helper_single_fb_probe - set up fbdev
> - * intelfb_create - re-use or alloc fb, build out fbdev structs
> - *
> - * Note that we don't make special consideration whether we could actually
> - * switch to the selected modes without a full modeset. E.g. when the display
> - * is in VGA mode we need to recalculate watermarks and set a new high-res
> - * framebuffer anyway.
> - */
> -static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
> - struct drm_fb_helper_crtc **crtcs,
> - struct drm_display_mode **modes,
> - struct drm_fb_offset *offsets,
> - bool *enabled, int width, int height)
> -{
> - struct drm_i915_private *dev_priv = to_i915(fb_helper->dev);
> - unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG);
> - unsigned long conn_configured, conn_seq;
> - int i, j;
> - bool *save_enabled;
> - bool fallback = true, ret = true;
> - int num_connectors_enabled = 0;
> - int num_connectors_detected = 0;
> - struct drm_modeset_acquire_ctx ctx;
> -
> - save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL);
> - if (!save_enabled)
> - return false;
> -
> - drm_modeset_acquire_init(&ctx, 0);
> -
> - while (drm_modeset_lock_all_ctx(fb_helper->dev, &ctx) != 0)
> - drm_modeset_backoff(&ctx);
> -
> - memcpy(save_enabled, enabled, count);
> - conn_seq = GENMASK(count - 1, 0);
> - conn_configured = 0;
> -retry:
> - for (i = 0; i < count; i++) {
> - struct drm_fb_helper_connector *fb_conn;
> - struct drm_connector *connector;
> - struct drm_encoder *encoder;
> - struct drm_fb_helper_crtc *new_crtc;
> -
> - fb_conn = fb_helper->connector_info[i];
> - connector = fb_conn->connector;
> -
> - if (conn_configured & BIT(i))
> - continue;
> -
> - /* First pass, only consider tiled connectors */
> - if (conn_seq == GENMASK(count - 1, 0) && !connector->has_tile)
> - continue;
> -
> - if (connector->status == connector_status_connected)
> - num_connectors_detected++;
> -
> - if (!enabled[i]) {
> - DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
> - connector->name);
> - conn_configured |= BIT(i);
> - continue;
> - }
> -
> - if (connector->force == DRM_FORCE_OFF) {
> - DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
> - connector->name);
> - enabled[i] = false;
> - continue;
> - }
> -
> - encoder = connector->state->best_encoder;
> - if (!encoder || WARN_ON(!connector->state->crtc)) {
> - if (connector->force > DRM_FORCE_OFF)
> - goto bail;
> -
> - DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
> - connector->name);
> - enabled[i] = false;
> - conn_configured |= BIT(i);
> - continue;
> - }
> -
> - num_connectors_enabled++;
> -
> - new_crtc = intel_fb_helper_crtc(fb_helper,
> - connector->state->crtc);
> -
> - /*
> - * Make sure we're not trying to drive multiple connectors
> - * with a single CRTC, since our cloning support may not
> - * match the BIOS.
> - */
> - for (j = 0; j < count; j++) {
> - if (crtcs[j] == new_crtc) {
> - DRM_DEBUG_KMS("fallback: cloned configuration\n");
> - goto bail;
> - }
> - }
> -
> - DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
> - connector->name);
> -
> - /* go for command line mode first */
> - modes[i] = drm_pick_cmdline_mode(fb_conn);
> -
> - /* try for preferred next */
> - if (!modes[i]) {
> - DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
> - connector->name, connector->has_tile);
> - modes[i] = drm_has_preferred_mode(fb_conn, width,
> - height);
> - }
> -
> - /* No preferred mode marked by the EDID? Are there any modes? */
> - if (!modes[i] && !list_empty(&connector->modes)) {
> - DRM_DEBUG_KMS("using first mode listed on connector %s\n",
> - connector->name);
> - modes[i] = list_first_entry(&connector->modes,
> - struct drm_display_mode,
> - head);
> - }
> -
> - /* last resort: use current mode */
> - if (!modes[i]) {
> - /*
> - * IMPORTANT: We want to use the adjusted mode (i.e.
> - * after the panel fitter upscaling) as the initial
> - * config, not the input mode, which is what crtc->mode
> - * usually contains. But since our current
> - * code puts a mode derived from the post-pfit timings
> - * into crtc->mode this works out correctly.
> - *
> - * This is crtc->mode and not crtc->state->mode for the
> - * fastboot check to work correctly. crtc_state->mode has
> - * I915_MODE_FLAG_INHERITED, which we clear to force check
> - * state.
> - */
> - DRM_DEBUG_KMS("looking for current mode on connector %s\n",
> - connector->name);
> - modes[i] = &connector->state->crtc->mode;
> - }
> - crtcs[i] = new_crtc;
> -
> - DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n",
> - connector->name,
> - connector->state->crtc->base.id,
> - connector->state->crtc->name,
> - modes[i]->hdisplay, modes[i]->vdisplay,
> - modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
> -
> - fallback = false;
> - conn_configured |= BIT(i);
> - }
> -
> - if (conn_configured != conn_seq) { /* repeat until no more are found */
> - conn_seq = conn_configured;
> - goto retry;
> - }
> -
> - /*
> - * If the BIOS didn't enable everything it could, fall back to have the
> - * same user experiencing of lighting up as much as possible like the
> - * fbdev helper library.
> - */
> - if (num_connectors_enabled != num_connectors_detected &&
> - num_connectors_enabled < INTEL_INFO(dev_priv)->num_pipes) {
> - DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
> - DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
> - num_connectors_detected);
> - fallback = true;
> - }
> -
> - if (fallback) {
> -bail:
> - DRM_DEBUG_KMS("Not using firmware configuration\n");
> - memcpy(enabled, save_enabled, count);
> - ret = false;
> - }
> -
> - drm_modeset_drop_locks(&ctx);
> - drm_modeset_acquire_fini(&ctx);
> -
> - kfree(save_enabled);
> - return ret;
> -}
> -
> static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
> - .initial_config = intel_fb_initial_config,
> .fb_probe = intelfb_create,
> };
>
> diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h
> index 81ae48a0df48..4db7de19a491 100644
> --- a/include/drm/drm_fb_helper.h
> +++ b/include/drm/drm_fb_helper.h
> @@ -101,29 +101,6 @@ struct drm_fb_helper_funcs {
> */
> int (*fb_probe)(struct drm_fb_helper *helper,
> struct drm_fb_helper_surface_size *sizes);
> -
> - /**
> - * @initial_config:
> - *
> - * Driver callback to setup an initial fbdev display configuration.
> - * Drivers can use this callback to tell the fbdev emulation what the
> - * preferred initial configuration is. This is useful to implement
> - * smooth booting where the fbdev (and subsequently all userspace) never
> - * changes the mode, but always inherits the existing configuration.
> - *
> - * This callback is optional.
> - *
> - * RETURNS:
> - *
> - * The driver should return true if a suitable initial configuration has
> - * been filled out and false when the fbdev helper should fall back to
> - * the default probing logic.
> - */
> - bool (*initial_config)(struct drm_fb_helper *fb_helper,
> - struct drm_fb_helper_crtc **crtcs,
> - struct drm_display_mode **modes,
> - struct drm_fb_offset *offsets,
> - bool *enabled, int width, int height);
> };
>
> struct drm_fb_helper_connector {
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Linux GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
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