drm/nv04/disp: hide all the cruft away in its own little hole

It'd be pretty awesome if someone would care enough to port this all
properly to a class interface, perhaps submitting a command stream to
the core via a sw object on PFIFO (emulating how EVO works basically,
and also what nvidia have done forever..)..

But, this seems unlikely given how old this hardware is now, so, lets
just hide it away.

There's a heap of other bits and pieces laying around that are still
tangled.  I'll (re)move them in pieces.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 211 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/dispnv04/disp.c b/drivers/gpu/drm/nouveau/dispnv04/disp.c
new file mode 100644
index 0000000..4908d3f
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/dispnv04/disp.c
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2009 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Ben Skeggs
+ */
+
+#include <core/object.h>
+#include <core/class.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_reg.h"
+#include "hw.h"
+#include "nouveau_encoder.h"
+#include "nouveau_connector.h"
+
+#include <subdev/i2c.h>
+
+int
+nv04_display_early_init(struct drm_device *dev)
+{
+	/* ensure vblank interrupts are off, they can't be enabled until
+	 * drm_vblank has been initialised
+	 */
+	NVWriteCRTC(dev, 0, NV_PCRTC_INTR_EN_0, 0);
+	if (nv_two_heads(dev))
+		NVWriteCRTC(dev, 1, NV_PCRTC_INTR_EN_0, 0);
+
+	return 0;
+}
+
+void
+nv04_display_late_takedown(struct drm_device *dev)
+{
+}
+
+int
+nv04_display_create(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_i2c *i2c = nouveau_i2c(drm->device);
+	struct dcb_table *dcb = &drm->vbios.dcb;
+	struct drm_connector *connector, *ct;
+	struct drm_encoder *encoder;
+	struct drm_crtc *crtc;
+	struct nv04_display *disp;
+	int i, ret;
+
+	disp = kzalloc(sizeof(*disp), GFP_KERNEL);
+	if (!disp)
+		return -ENOMEM;
+
+	nouveau_display(dev)->priv = disp;
+	nouveau_display(dev)->dtor = nv04_display_destroy;
+	nouveau_display(dev)->init = nv04_display_init;
+	nouveau_display(dev)->fini = nv04_display_fini;
+
+	nouveau_hw_save_vga_fonts(dev, 1);
+
+	ret = nouveau_object_new(nv_object(drm), NVDRM_DEVICE, 0xd1500000,
+				 NV04_DISP_CLASS, NULL, 0, &disp->core);
+	if (ret)
+		return ret;
+
+	nv04_crtc_create(dev, 0);
+	if (nv_two_heads(dev))
+		nv04_crtc_create(dev, 1);
+
+	for (i = 0; i < dcb->entries; i++) {
+		struct dcb_output *dcbent = &dcb->entry[i];
+
+		connector = nouveau_connector_create(dev, dcbent->connector);
+		if (IS_ERR(connector))
+			continue;
+
+		switch (dcbent->type) {
+		case DCB_OUTPUT_ANALOG:
+			ret = nv04_dac_create(connector, dcbent);
+			break;
+		case DCB_OUTPUT_LVDS:
+		case DCB_OUTPUT_TMDS:
+			ret = nv04_dfp_create(connector, dcbent);
+			break;
+		case DCB_OUTPUT_TV:
+			if (dcbent->location == DCB_LOC_ON_CHIP)
+				ret = nv17_tv_create(connector, dcbent);
+			else
+				ret = nv04_tv_create(connector, dcbent);
+			break;
+		default:
+			NV_WARN(drm, "DCB type %d not known\n", dcbent->type);
+			continue;
+		}
+
+		if (ret)
+			continue;
+	}
+
+	list_for_each_entry_safe(connector, ct,
+				 &dev->mode_config.connector_list, head) {
+		if (!connector->encoder_ids[0]) {
+			NV_WARN(drm, "%s has no encoders, removing\n",
+				drm_get_connector_name(connector));
+			connector->funcs->destroy(connector);
+		}
+	}
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
+		nv_encoder->i2c = i2c->find(i2c, nv_encoder->dcb->i2c_index);
+	}
+
+	/* Save previous state */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+		crtc->funcs->save(crtc);
+
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		struct drm_encoder_helper_funcs *func = encoder->helper_private;
+
+		func->save(encoder);
+	}
+
+	return 0;
+}
+
+void
+nv04_display_destroy(struct drm_device *dev)
+{
+	struct nv04_display *disp = nv04_display(dev);
+	struct drm_encoder *encoder;
+	struct drm_crtc *crtc;
+
+	/* Turn every CRTC off. */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct drm_mode_set modeset = {
+			.crtc = crtc,
+		};
+
+		drm_mode_set_config_internal(&modeset);
+	}
+
+	/* Restore state */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		struct drm_encoder_helper_funcs *func = encoder->helper_private;
+
+		func->restore(encoder);
+	}
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+		crtc->funcs->restore(crtc);
+
+	nouveau_hw_save_vga_fonts(dev, 0);
+
+	nouveau_display(dev)->priv = NULL;
+	kfree(disp);
+}
+
+int
+nv04_display_init(struct drm_device *dev)
+{
+	struct drm_encoder *encoder;
+	struct drm_crtc *crtc;
+
+	/* meh.. modeset apparently doesn't setup all the regs and depends
+	 * on pre-existing state, for now load the state of the card *before*
+	 * nouveau was loaded, and then do a modeset.
+	 *
+	 * best thing to do probably is to make save/restore routines not
+	 * save/restore "pre-load" state, but more general so we can save
+	 * on suspend too.
+	 */
+	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
+		struct drm_encoder_helper_funcs *func = encoder->helper_private;
+
+		func->restore(encoder);
+	}
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
+		crtc->funcs->restore(crtc);
+
+	return 0;
+}
+
+void
+nv04_display_fini(struct drm_device *dev)
+{
+	/* disable vblank interrupts */
+	NVWriteCRTC(dev, 0, NV_PCRTC_INTR_EN_0, 0);
+	if (nv_two_heads(dev))
+		NVWriteCRTC(dev, 1, NV_PCRTC_INTR_EN_0, 0);
+}