[PATCH 06/16] drm/i915/fbdev: Move intel_fb_initial_config() to fbdev helper
Noralf Trønnes
noralf at tronnes.org
Sat Mar 30 20:50:05 UTC 2019
Den 27.03.2019 14.33, skrev Jani Nikula:
> On Tue, 26 Mar 2019, Noralf Trønnes <noralf at tronnes.org> wrote:
>> 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
>
> This holds after intel_modeset_init(), in time for the use here.
>
>> Suggested-by: Daniel Vetter <daniel.vetter at ffwll.ch>
>> Cc: Jani Nikula <jani.nikula at linux.intel.com>
>> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
>> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> Cc: intel-gfx at lists.freedesktop.org
>> Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
>
> Reviewed-by: Jani Nikula <jani.nikula at intel.com>
>
> and
>
> Acked-by: Jani Nikula <jani.nikula at intel.com>
>
> for merging via drm-misc or whichever tree makes most sense.
>
Thanks, I'll take it through drm-misc.
One of the patches had a conflict with drm-tip, so I didn't get a CI
run. I'll apply this if CI agrees when I submit the next version.
Noralf.
>
>> ---
>> 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 36310901e935..634f4dcf0c41 100644
>> --- a/drivers/gpu/drm/drm_fb_helper.c
>> +++ b/drivers/gpu/drm/drm_fb_helper.c
>> @@ -2545,6 +2545,194 @@ 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_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;
>> + 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)
>> {
>> @@ -2577,10 +2765,8 @@ 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 e8f694b57b8a..20e91600cf71 100644
>> --- a/drivers/gpu/drm/i915/intel_fbdev.c
>> +++ b/drivers/gpu/drm/i915/intel_fbdev.c
>> @@ -292,225 +292,7 @@ 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 7a095964f6b2..bca4b34dc93b 100644
>> --- a/include/drm/drm_fb_helper.h
>> +++ b/include/drm/drm_fb_helper.h
>> @@ -100,29 +100,6 @@ 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 {
>
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