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@@ -242,7 +242,130 @@ static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
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*blue = intel_crtc->lut_b[regno] << 8;
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}
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+static struct drm_fb_helper_crtc *
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+intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
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+{
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+ int i;
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+
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+ for (i = 0; i < fb_helper->crtc_count; i++)
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+ if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
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+ return &fb_helper->crtc_info[i];
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+
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+ return NULL;
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+}
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+
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+/*
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+ * Try to read the BIOS display configuration and use it for the initial
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+ * fb configuration.
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+ *
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+ * The BIOS or boot loader will generally create an initial display
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+ * configuration for us that includes some set of active pipes and displays.
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+ * This routine tries to figure out which pipes and connectors are active
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+ * and stuffs them into the crtcs and modes array given to us by the
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+ * drm_fb_helper code.
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+ *
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+ * The overall sequence is:
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+ * intel_fbdev_init - from driver load
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+ * intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
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+ * drm_fb_helper_init - build fb helper structs
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+ * drm_fb_helper_single_add_all_connectors - more fb helper structs
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+ * intel_fbdev_initial_config - apply the config
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+ * drm_fb_helper_initial_config - call ->probe then register_framebuffer()
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+ * drm_setup_crtcs - build crtc config for fbdev
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+ * intel_fb_initial_config - find active connectors etc
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+ * drm_fb_helper_single_fb_probe - set up fbdev
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+ * intelfb_create - re-use or alloc fb, build out fbdev structs
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+ *
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+ * Note that we don't make special consideration whether we could actually
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+ * switch to the selected modes without a full modeset. E.g. when the display
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+ * is in VGA mode we need to recalculate watermarks and set a new high-res
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+ * framebuffer anyway.
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+ */
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+static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
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+ struct drm_fb_helper_crtc **crtcs,
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+ struct drm_display_mode **modes,
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+ bool *enabled, int width, int height)
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+{
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+ int i, j;
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+
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+ for (i = 0; i < fb_helper->connector_count; i++) {
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+ struct drm_fb_helper_connector *fb_conn;
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+ struct drm_connector *connector;
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+ struct drm_encoder *encoder;
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+ struct drm_fb_helper_crtc *new_crtc;
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+
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+ fb_conn = fb_helper->connector_info[i];
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+ connector = fb_conn->connector;
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+ if (!enabled[i]) {
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+ DRM_DEBUG_KMS("connector %d not enabled, skipping\n",
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+ connector->base.id);
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+ continue;
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+ }
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+
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+ encoder = connector->encoder;
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+ if (!encoder || WARN_ON(!encoder->crtc)) {
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+ DRM_DEBUG_KMS("connector %d has no encoder or crtc, skipping\n",
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+ connector->base.id);
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+ enabled[i] = false;
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+ continue;
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+ }
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+
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+ new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
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+
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+ /*
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+ * Make sure we're not trying to drive multiple connectors
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+ * with a single CRTC, since our cloning support may not
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+ * match the BIOS.
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+ */
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+ for (j = 0; j < fb_helper->connector_count; j++) {
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+ if (crtcs[j] == new_crtc)
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+ return false;
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+ }
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+
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+ DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
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+ fb_conn->connector->base.id);
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+
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+ /* go for command line mode first */
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+ modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
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+
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+ /* try for preferred next */
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+ if (!modes[i]) {
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+ DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
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+ fb_conn->connector->base.id);
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+ modes[i] = drm_has_preferred_mode(fb_conn, width,
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+ height);
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+ }
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+
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+ /* last resort: use current mode */
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+ if (!modes[i]) {
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+ /*
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+ * IMPORTANT: We want to use the adjusted mode (i.e.
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+ * after the panel fitter upscaling) as the initial
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+ * config, not the input mode, which is what crtc->mode
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+ * usually contains. But since our current fastboot
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+ * code puts a mode derived from the post-pfit timings
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+ * into crtc->mode this works out correctly. We don't
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+ * use hwmode anywhere right now, so use it for this
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+ * since the fb helper layer wants a pointer to
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+ * something we own.
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+ */
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+ intel_mode_from_pipe_config(&encoder->crtc->hwmode,
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+ &to_intel_crtc(encoder->crtc)->config);
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+ modes[i] = &encoder->crtc->hwmode;
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+ }
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+ crtcs[i] = new_crtc;
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+
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+ DRM_DEBUG_KMS("connector %s on crtc %d: %s\n",
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+ drm_get_connector_name(connector),
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+ encoder->crtc->base.id,
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+ modes[i]->name);
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+ }
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+
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+ return true;
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+}
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+
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static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
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+ .initial_config = intel_fb_initial_config,
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.gamma_set = intel_crtc_fb_gamma_set,
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.gamma_get = intel_crtc_fb_gamma_get,
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.fb_probe = intelfb_create,
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Jesse Barnes