Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 476 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
new file mode 100644
index 000000000..a61458277
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
@@ -0,0 +1,476 @@
+/*
+ * Copyright (C) 2009 Red Hat <mjg@redhat.com>
+ *
+ * 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 (including the
+ * next paragraph) 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 OWNER(S) AND/OR ITS SUPPLIERS 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:
+ *  Matthew Garrett <mjg@redhat.com>
+ *
+ * Register locations derived from NVClock by Roderick Colenbrander
+ */
+
+#include <linux/apple-gmux.h>
+#include <linux/backlight.h>
+#include <linux/idr.h>
+
+#include "nouveau_drv.h"
+#include "nouveau_reg.h"
+#include "nouveau_encoder.h"
+#include "nouveau_connector.h"
+#include "nouveau_acpi.h"
+
+static struct ida bl_ida;
+#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
+
+static bool
+nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],
+			   struct nouveau_backlight *bl)
+{
+	const int nb = ida_alloc_max(&bl_ida, 99, GFP_KERNEL);
+
+	if (nb < 0)
+		return false;
+	if (nb > 0)
+		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
+	else
+		snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
+	bl->id = nb;
+	return true;
+}
+
+static int
+nv40_get_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
+		   NV40_PMC_BACKLIGHT_MASK) >> 16;
+
+	return val;
+}
+
+static int
+nv40_set_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int val = bd->props.brightness;
+	int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
+
+	nvif_wr32(device, NV40_PMC_BACKLIGHT,
+		  (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
+
+	return 0;
+}
+
+static const struct backlight_ops nv40_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.get_brightness = nv40_get_intensity,
+	.update_status = nv40_set_intensity,
+};
+
+static int
+nv40_backlight_init(struct nouveau_encoder *encoder,
+		    struct backlight_properties *props,
+		    const struct backlight_ops **ops)
+{
+	struct nouveau_drm *drm = nouveau_drm(encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+
+	if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
+		return -ENODEV;
+
+	props->max_brightness = 31;
+	*ops = &nv40_bl_ops;
+	return 0;
+}
+
+static int
+nv50_get_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int or = ffs(nv_encoder->dcb->or) - 1;
+	u32 div = 1025;
+	u32 val;
+
+	val  = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
+	val &= NV50_PDISP_SOR_PWM_CTL_VAL;
+	return ((val * 100) + (div / 2)) / div;
+}
+
+static int
+nv50_set_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int or = ffs(nv_encoder->dcb->or) - 1;
+	u32 div = 1025;
+	u32 val = (bd->props.brightness * div) / 100;
+
+	nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
+		  NV50_PDISP_SOR_PWM_CTL_NEW | val);
+	return 0;
+}
+
+static const struct backlight_ops nv50_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.get_brightness = nv50_get_intensity,
+	.update_status = nv50_set_intensity,
+};
+
+/*
+ * eDP brightness callbacks need to happen under lock, since we need to
+ * enable/disable the backlight ourselves for modesets
+ */
+static int
+nv50_edp_get_brightness(struct backlight_device *bd)
+{
+	struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
+	struct drm_device *dev = connector->dev;
+	struct drm_crtc *crtc;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = 0;
+
+	drm_modeset_acquire_init(&ctx, 0);
+
+retry:
+	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
+	if (ret == -EDEADLK)
+		goto deadlock;
+	else if (ret < 0)
+		goto out;
+
+	crtc = connector->state->crtc;
+	if (!crtc)
+		goto out;
+
+	ret = drm_modeset_lock(&crtc->mutex, &ctx);
+	if (ret == -EDEADLK)
+		goto deadlock;
+	else if (ret < 0)
+		goto out;
+
+	if (!crtc->state->active)
+		goto out;
+
+	ret = bd->props.brightness;
+out:
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+	return ret;
+deadlock:
+	drm_modeset_backoff(&ctx);
+	goto retry;
+}
+
+static int
+nv50_edp_set_brightness(struct backlight_device *bd)
+{
+	struct drm_connector *connector = dev_get_drvdata(bd->dev.parent);
+	struct nouveau_connector *nv_connector = nouveau_connector(connector);
+	struct drm_device *dev = connector->dev;
+	struct drm_crtc *crtc;
+	struct drm_dp_aux *aux = &nv_connector->aux;
+	struct nouveau_backlight *nv_bl = nv_connector->backlight;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = 0;
+
+	drm_modeset_acquire_init(&ctx, 0);
+retry:
+	ret = drm_modeset_lock(&dev->mode_config.connection_mutex, &ctx);
+	if (ret == -EDEADLK)
+		goto deadlock;
+	else if (ret < 0)
+		goto out;
+
+	crtc = connector->state->crtc;
+	if (!crtc)
+		goto out;
+
+	ret = drm_modeset_lock(&crtc->mutex, &ctx);
+	if (ret == -EDEADLK)
+		goto deadlock;
+	else if (ret < 0)
+		goto out;
+
+	if (crtc->state->active)
+		ret = drm_edp_backlight_set_level(aux, &nv_bl->edp_info, bd->props.brightness);
+
+out:
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+	return ret;
+deadlock:
+	drm_modeset_backoff(&ctx);
+	goto retry;
+}
+
+static const struct backlight_ops nv50_edp_bl_ops = {
+	.get_brightness = nv50_edp_get_brightness,
+	.update_status = nv50_edp_set_brightness,
+};
+
+static int
+nva3_get_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int or = ffs(nv_encoder->dcb->or) - 1;
+	u32 div, val;
+
+	div  = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
+	val  = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
+	val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
+	if (div && div >= val)
+		return ((val * 100) + (div / 2)) / div;
+
+	return 100;
+}
+
+static int
+nva3_set_intensity(struct backlight_device *bd)
+{
+	struct nouveau_encoder *nv_encoder = bl_get_data(bd);
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+	int or = ffs(nv_encoder->dcb->or) - 1;
+	u32 div, val;
+
+	div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
+	val = (bd->props.brightness * div) / 100;
+	if (div) {
+		nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
+			  val |
+			  NV50_PDISP_SOR_PWM_CTL_NEW |
+			  NVA3_PDISP_SOR_PWM_CTL_UNK);
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+static const struct backlight_ops nva3_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.get_brightness = nva3_get_intensity,
+	.update_status = nva3_set_intensity,
+};
+
+/* FIXME: perform backlight probing for eDP _before_ this, this only gets called after connector
+ * registration which happens after the initial modeset
+ */
+static int
+nv50_backlight_init(struct nouveau_backlight *bl,
+		    struct nouveau_connector *nv_conn,
+		    struct nouveau_encoder *nv_encoder,
+		    struct backlight_properties *props,
+		    const struct backlight_ops **ops)
+{
+	struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
+	struct nvif_object *device = &drm->client.device.object;
+
+	if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)) ||
+	    nv_conn->base.status != connector_status_connected)
+		return -ENODEV;
+
+	if (nv_conn->type == DCB_CONNECTOR_eDP) {
+		int ret;
+		u16 current_level;
+		u8 edp_dpcd[EDP_DISPLAY_CTL_CAP_SIZE];
+		u8 current_mode;
+
+		ret = drm_dp_dpcd_read(&nv_conn->aux, DP_EDP_DPCD_REV, edp_dpcd,
+				       EDP_DISPLAY_CTL_CAP_SIZE);
+		if (ret < 0)
+			return ret;
+
+		/* TODO: Add support for hybrid PWM/DPCD panels */
+		if (drm_edp_backlight_supported(edp_dpcd) &&
+		    (edp_dpcd[1] & DP_EDP_BACKLIGHT_AUX_ENABLE_CAP) &&
+		    (edp_dpcd[2] & DP_EDP_BACKLIGHT_BRIGHTNESS_AUX_SET_CAP)) {
+			NV_DEBUG(drm, "DPCD backlight controls supported on %s\n",
+				 nv_conn->base.name);
+
+			ret = drm_edp_backlight_init(&nv_conn->aux, &bl->edp_info, 0, edp_dpcd,
+						     &current_level, &current_mode);
+			if (ret < 0)
+				return ret;
+
+			ret = drm_edp_backlight_enable(&nv_conn->aux, &bl->edp_info, current_level);
+			if (ret < 0) {
+				NV_ERROR(drm, "Failed to enable backlight on %s: %d\n",
+					 nv_conn->base.name, ret);
+				return ret;
+			}
+
+			*ops = &nv50_edp_bl_ops;
+			props->brightness = current_level;
+			props->max_brightness = bl->edp_info.max;
+			bl->uses_dpcd = true;
+			return 0;
+		}
+	}
+
+	if (drm->client.device.info.chipset <= 0xa0 ||
+	    drm->client.device.info.chipset == 0xaa ||
+	    drm->client.device.info.chipset == 0xac)
+		*ops = &nv50_bl_ops;
+	else
+		*ops = &nva3_bl_ops;
+
+	props->max_brightness = 100;
+
+	return 0;
+}
+
+int
+nouveau_backlight_init(struct drm_connector *connector)
+{
+	struct nouveau_drm *drm = nouveau_drm(connector->dev);
+	struct nouveau_backlight *bl;
+	struct nouveau_encoder *nv_encoder = NULL;
+	struct nvif_device *device = &drm->client.device;
+	char backlight_name[BL_NAME_SIZE];
+	struct backlight_properties props = {0};
+	const struct backlight_ops *ops;
+	int ret;
+
+	if (apple_gmux_present()) {
+		NV_INFO_ONCE(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
+		return 0;
+	}
+
+	if (connector->connector_type == DRM_MODE_CONNECTOR_LVDS)
+		nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
+	else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP)
+		nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
+	else
+		return 0;
+
+	if (!nv_encoder)
+		return 0;
+
+	bl = kzalloc(sizeof(*bl), GFP_KERNEL);
+	if (!bl)
+		return -ENOMEM;
+
+	switch (device->info.family) {
+	case NV_DEVICE_INFO_V0_CURIE:
+		ret = nv40_backlight_init(nv_encoder, &props, &ops);
+		break;
+	case NV_DEVICE_INFO_V0_TESLA:
+	case NV_DEVICE_INFO_V0_FERMI:
+	case NV_DEVICE_INFO_V0_KEPLER:
+	case NV_DEVICE_INFO_V0_MAXWELL:
+	case NV_DEVICE_INFO_V0_PASCAL:
+	case NV_DEVICE_INFO_V0_VOLTA:
+	case NV_DEVICE_INFO_V0_TURING:
+	case NV_DEVICE_INFO_V0_AMPERE: //XXX: not confirmed
+		ret = nv50_backlight_init(bl, nouveau_connector(connector),
+					  nv_encoder, &props, &ops);
+		break;
+	default:
+		ret = 0;
+		goto fail_alloc;
+	}
+
+	if (ret) {
+		if (ret == -ENODEV)
+			ret = 0;
+		goto fail_alloc;
+	}
+
+	if (!nouveau_acpi_video_backlight_use_native()) {
+		NV_INFO(drm, "Skipping nv_backlight registration\n");
+		goto fail_alloc;
+	}
+
+	if (!nouveau_get_backlight_name(backlight_name, bl)) {
+		NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
+		goto fail_alloc;
+	}
+
+	props.type = BACKLIGHT_RAW;
+	bl->dev = backlight_device_register(backlight_name, connector->kdev,
+					    nv_encoder, ops, &props);
+	if (IS_ERR(bl->dev)) {
+		if (bl->id >= 0)
+			ida_free(&bl_ida, bl->id);
+		ret = PTR_ERR(bl->dev);
+		goto fail_alloc;
+	}
+
+	nouveau_connector(connector)->backlight = bl;
+	if (!bl->dev->props.brightness)
+		bl->dev->props.brightness =
+			bl->dev->ops->get_brightness(bl->dev);
+	backlight_update_status(bl->dev);
+
+	return 0;
+
+fail_alloc:
+	kfree(bl);
+	/*
+	 * If we get here we have an internal panel, but no nv_backlight,
+	 * try registering an ACPI video backlight device instead.
+	 */
+	if (ret == 0)
+		nouveau_acpi_video_register_backlight();
+
+	return ret;
+}
+
+void
+nouveau_backlight_fini(struct drm_connector *connector)
+{
+	struct nouveau_connector *nv_conn = nouveau_connector(connector);
+	struct nouveau_backlight *bl = nv_conn->backlight;
+
+	if (!bl)
+		return;
+
+	if (bl->id >= 0)
+		ida_free(&bl_ida, bl->id);
+
+	backlight_device_unregister(bl->dev);
+	nv_conn->backlight = NULL;
+	kfree(bl);
+}
+
+void
+nouveau_backlight_ctor(void)
+{
+	ida_init(&bl_ida);
+}
+
+void
+nouveau_backlight_dtor(void)
+{
+	ida_destroy(&bl_ida);
+}