drm/nvd0/disp: call into core to handle dac power state changes

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

drivers/gpu/drm/nouveau/Makefile

@@ -137,6 +137,7 @@ nouveau-y += core/engine/disp/nva0.o
 nouveau-y += core/engine/disp/nva3.o
 nouveau-y += core/engine/disp/nvd0.o
 nouveau-y += core/engine/disp/nve0.o
+nouveau-y += core/engine/disp/dacnv50.o
 nouveau-y += core/engine/disp/sornv50.o
 nouveau-y += core/engine/disp/sornvd0.o
 nouveau-y += core/engine/disp/vga.o

drivers/gpu/drm/nouveau/core/engine/disp/dacnv50.c

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2012 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.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include <core/os.h>
+#include <core/class.h>
+
+#include <subdev/bios.h>
+#include <subdev/bios/dcb.h>
+#include <subdev/timer.h>
+
+#include "nv50.h"
+
+int
+nv50_dac_power(struct nv50_disp_priv *priv, int or, u32 data)
+{
+	const u32 stat = (data & NV50_DISP_DAC_PWR_HSYNC) |
+		         (data & NV50_DISP_DAC_PWR_VSYNC) |
+		         (data & NV50_DISP_DAC_PWR_DATA) |
+		         (data & NV50_DISP_DAC_PWR_STATE);
+	const u32 doff = (or * 0x800);
+	nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
+	nv_mask(priv, 0x61a004 + doff, 0xc000007f, 0x80000000 | stat);
+	nv_wait(priv, 0x61a004 + doff, 0x80000000, 0x00000000);
+	return 0;
+}
+
+int
+nv50_dac_sense(struct nv50_disp_priv *priv, int or)
+{
+	const u32 doff = (or * 0x800);
+	int load = -EINVAL;
+	nv_wr32(priv, 0x61a00c + doff, 0x00100000);
+	udelay(9500);
+	nv_wr32(priv, 0x61a00c + doff, 0x80000000);
+	load = (nv_rd32(priv, 0x61a00c + doff) & 0x38000000) >> 27;
+	nv_wr32(priv, 0x61a00c + doff, 0x00000000);
+	return load;
+}
+
+int
+nv50_dac_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
+{
+	struct nv50_disp_priv *priv = (void *)object->engine;
+	const u8 or = (mthd & NV50_DISP_DAC_MTHD_OR);
+	u32 *data = args;
+	int ret;
+
+	if (size < sizeof(u32))
+		return -EINVAL;
+
+	switch (mthd & ~0x3f) {
+	case NV50_DISP_DAC_PWR:
+		ret = priv->dac.power(priv, or, data[0]);
+		break;
+	case NV50_DISP_DAC_LOAD:
+		ret = priv->dac.sense(priv, or);
+		if (ret >= 0) {
+			data[0] = ret;
+			ret = 0;
+		}
+		break;
+	default:
+		BUG_ON(1);
+	}
+
+	return ret;
+}

drivers/gpu/drm/nouveau/core/engine/disp/nv50.h

@@ -18,6 +18,8 @@ struct nv50_disp_priv {
 	} head;
 	struct {
 		int nr;
+		int (*power)(struct nv50_disp_priv *, int dac, u32 data);
+		int (*sense)(struct nv50_disp_priv *, int dac);
 	} dac;
 	struct {
 		int nr;
@@ -36,6 +38,12 @@ struct nv50_disp_priv {
 
 extern struct nouveau_omthds nva3_disp_base_omthds[];
 
+#define DAC_MTHD(n) (n), (n) + 0x03
+
+int nv50_dac_mthd(struct nouveau_object *, u32, void *, u32);
+int nv50_dac_power(struct nv50_disp_priv *, int, u32);
+int nv50_dac_sense(struct nv50_disp_priv *, int);
+
 #define SOR_MTHD(n) (n), (n) + 0x3f
 
 int nv50_sor_mthd(struct nouveau_object *, u32, void *, u32);

drivers/gpu/drm/nouveau/core/engine/disp/nva3.c

@@ -48,6 +48,8 @@ nva3_disp_base_omthds[] = {
 	{ SOR_MTHD(NV94_DISP_SOR_DP_DRVCTL(1)), nv50_sor_mthd },
 	{ SOR_MTHD(NV94_DISP_SOR_DP_DRVCTL(2)), nv50_sor_mthd },
 	{ SOR_MTHD(NV94_DISP_SOR_DP_DRVCTL(3)), nv50_sor_mthd },
+	{ DAC_MTHD(NV50_DISP_DAC_PWR)         , nv50_dac_mthd },
+	{ DAC_MTHD(NV50_DISP_DAC_LOAD)        , nv50_dac_mthd },
 	{},
 };
 

drivers/gpu/drm/nouveau/core/engine/disp/nvd0.c

@@ -896,6 +896,8 @@ nvd0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->head.nr = nv_rd32(priv, 0x022448);
 	priv->dac.nr = 3;
 	priv->sor.nr = 4;
+	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 	priv->sor.dp_train = nvd0_sor_dp_train;
 	priv->sor.dp_lnkctl = nvd0_sor_dp_lnkctl;

drivers/gpu/drm/nouveau/core/engine/disp/nve0.c

@@ -66,6 +66,8 @@ nve0_disp_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
 	priv->head.nr = nv_rd32(priv, 0x022448);
 	priv->dac.nr = 3;
 	priv->sor.nr = 4;
+	priv->dac.power = nv50_dac_power;
+	priv->dac.sense = nv50_dac_sense;
 	priv->sor.power = nv50_sor_power;
 	priv->sor.dp_train = nvd0_sor_dp_train;
 	priv->sor.dp_lnkctl = nvd0_sor_dp_lnkctl;

drivers/gpu/drm/nouveau/core/include/core/class.h

@@ -194,6 +194,26 @@ struct nve0_channel_ind_class {
 #define NV94_DISP_SOR_DP_DRVCTL_VS                                   0x00000300
 #define NV94_DISP_SOR_DP_DRVCTL_PE                                   0x00000003
 
+#define NV50_DISP_DAC_MTHD                                           0x00020000
+#define NV50_DISP_DAC_MTHD_TYPE                                      0x0000f000
+#define NV50_DISP_DAC_MTHD_OR                                        0x00000003
+
+#define NV50_DISP_DAC_PWR                                            0x00020000
+#define NV50_DISP_DAC_PWR_HSYNC                                      0x00000001
+#define NV50_DISP_DAC_PWR_HSYNC_ON                                   0x00000000
+#define NV50_DISP_DAC_PWR_HSYNC_LO                                   0x00000001
+#define NV50_DISP_DAC_PWR_VSYNC                                      0x00000004
+#define NV50_DISP_DAC_PWR_VSYNC_ON                                   0x00000000
+#define NV50_DISP_DAC_PWR_VSYNC_LO                                   0x00000004
+#define NV50_DISP_DAC_PWR_DATA                                       0x00000010
+#define NV50_DISP_DAC_PWR_DATA_ON                                    0x00000000
+#define NV50_DISP_DAC_PWR_DATA_LO                                    0x00000010
+#define NV50_DISP_DAC_PWR_STATE                                      0x00000040
+#define NV50_DISP_DAC_PWR_STATE_ON                                   0x00000000
+#define NV50_DISP_DAC_PWR_STATE_OFF                                  0x00000040
+#define NV50_DISP_DAC_LOAD                                           0x0002000c
+#define NV50_DISP_DAC_LOAD_VALUE                                     0x00000007
+
 struct nv50_display_class {
 };
 

drivers/gpu/drm/nouveau/nvd0_display.c

@@ -1076,20 +1076,17 @@ static void
 nvd0_dac_dpms(struct drm_encoder *encoder, int mode)
 {
 	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
-	struct drm_device *dev = encoder->dev;
-	struct nouveau_device *device = nouveau_dev(dev);
+	struct nvd0_disp *disp = nvd0_disp(encoder->dev);
 	int or = nv_encoder->or;
 	u32 dpms_ctrl;
 
-	dpms_ctrl = 0x80000000;
+	dpms_ctrl = 0x00000000;
 	if (mode == DRM_MODE_DPMS_STANDBY || mode == DRM_MODE_DPMS_OFF)
 		dpms_ctrl |= 0x00000001;
 	if (mode == DRM_MODE_DPMS_SUSPEND || mode == DRM_MODE_DPMS_OFF)
 		dpms_ctrl |= 0x00000004;
 
-	nv_wait(device, 0x61a004 + (or * 0x0800), 0x80000000, 0x00000000);
-	nv_mask(device, 0x61a004 + (or * 0x0800), 0xc000007f, dpms_ctrl);
-	nv_wait(device, 0x61a004 + (or * 0x0800), 0x80000000, 0x00000000);
+	nv_call(disp->core, NV50_DISP_DAC_PWR + or, dpms_ctrl);
 }
 
 static bool
@@ -1177,23 +1174,15 @@ nvd0_dac_disconnect(struct drm_encoder *encoder)
 static enum drm_connector_status
 nvd0_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
 {
-	enum drm_connector_status status = connector_status_disconnected;
-	struct nouveau_encoder *nv_encoder = nouveau_encoder(encoder);
-	struct drm_device *dev = encoder->dev;
-	struct nouveau_device *device = nouveau_dev(dev);
-	int or = nv_encoder->or;
+	struct nvd0_disp *disp = nvd0_disp(encoder->dev);
+	int ret, or = nouveau_encoder(encoder)->or;
 	u32 load;
 
-	nv_wr32(device, 0x61a00c + (or * 0x800), 0x00100000);
-	udelay(9500);
-	nv_wr32(device, 0x61a00c + (or * 0x800), 0x80000000);
-
-	load = nv_rd32(device, 0x61a00c + (or * 0x800));
-	if ((load & 0x38000000) == 0x38000000)
-		status = connector_status_connected;
+	ret = nv_exec(disp->core, NV50_DISP_DAC_LOAD + or, &load, sizeof(load));
+	if (ret || load != 7)
+		return connector_status_disconnected;
 
-	nv_wr32(device, 0x61a00c + (or * 0x800), 0x00000000);
-	return status;
+	return connector_status_connected;
 }
 
 static void