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path: root/drivers/gpu/drm/gma500/opregion.c
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Diffstat (limited to 'drivers/gpu/drm/gma500/opregion.c')
-rw-r--r--drivers/gpu/drm/gma500/opregion.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/drivers/gpu/drm/gma500/opregion.c b/drivers/gpu/drm/gma500/opregion.c
new file mode 100644
index 000000000000..4f186eca3a30
--- /dev/null
+++ b/drivers/gpu/drm/gma500/opregion.c
@@ -0,0 +1,344 @@
+/*
+ * Copyright 2011 Intel Corporation
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ *
+ */
+#include <linux/acpi.h>
+#include <linux/acpi_io.h>
+#include "psb_drv.h"
+#include "psb_intel_reg.h"
+
+#define PCI_ASLE 0xe4
+#define PCI_ASLS 0xfc
+
+#define OPREGION_HEADER_OFFSET 0
+#define OPREGION_ACPI_OFFSET 0x100
+#define ACPI_CLID 0x01ac /* current lid state indicator */
+#define ACPI_CDCK 0x01b0 /* current docking state indicator */
+#define OPREGION_SWSCI_OFFSET 0x200
+#define OPREGION_ASLE_OFFSET 0x300
+#define OPREGION_VBT_OFFSET 0x400
+
+#define OPREGION_SIGNATURE "IntelGraphicsMem"
+#define MBOX_ACPI (1<<0)
+#define MBOX_SWSCI (1<<1)
+#define MBOX_ASLE (1<<2)
+
+struct opregion_header {
+ u8 signature[16];
+ u32 size;
+ u32 opregion_ver;
+ u8 bios_ver[32];
+ u8 vbios_ver[16];
+ u8 driver_ver[16];
+ u32 mboxes;
+ u8 reserved[164];
+} __packed;
+
+/* OpRegion mailbox #1: public ACPI methods */
+struct opregion_acpi {
+ u32 drdy; /* driver readiness */
+ u32 csts; /* notification status */
+ u32 cevt; /* current event */
+ u8 rsvd1[20];
+ u32 didl[8]; /* supported display devices ID list */
+ u32 cpdl[8]; /* currently presented display list */
+ u32 cadl[8]; /* currently active display list */
+ u32 nadl[8]; /* next active devices list */
+ u32 aslp; /* ASL sleep time-out */
+ u32 tidx; /* toggle table index */
+ u32 chpd; /* current hotplug enable indicator */
+ u32 clid; /* current lid state*/
+ u32 cdck; /* current docking state */
+ u32 sxsw; /* Sx state resume */
+ u32 evts; /* ASL supported events */
+ u32 cnot; /* current OS notification */
+ u32 nrdy; /* driver status */
+ u8 rsvd2[60];
+} __packed;
+
+/* OpRegion mailbox #2: SWSCI */
+struct opregion_swsci {
+ /*FIXME: add it later*/
+} __packed;
+
+/* OpRegion mailbox #3: ASLE */
+struct opregion_asle {
+ u32 ardy; /* driver readiness */
+ u32 aslc; /* ASLE interrupt command */
+ u32 tche; /* technology enabled indicator */
+ u32 alsi; /* current ALS illuminance reading */
+ u32 bclp; /* backlight brightness to set */
+ u32 pfit; /* panel fitting state */
+ u32 cblv; /* current brightness level */
+ u16 bclm[20]; /* backlight level duty cycle mapping table */
+ u32 cpfm; /* current panel fitting mode */
+ u32 epfm; /* enabled panel fitting modes */
+ u8 plut[74]; /* panel LUT and identifier */
+ u32 pfmb; /* PWM freq and min brightness */
+ u8 rsvd[102];
+} __packed;
+
+/* ASLE irq request bits */
+#define ASLE_SET_ALS_ILLUM (1 << 0)
+#define ASLE_SET_BACKLIGHT (1 << 1)
+#define ASLE_SET_PFIT (1 << 2)
+#define ASLE_SET_PWM_FREQ (1 << 3)
+#define ASLE_REQ_MSK 0xf
+
+/* response bits of ASLE irq request */
+#define ASLE_ALS_ILLUM_FAILED (1<<10)
+#define ASLE_BACKLIGHT_FAILED (1<<12)
+#define ASLE_PFIT_FAILED (1<<14)
+#define ASLE_PWM_FREQ_FAILED (1<<16)
+
+/* ASLE backlight brightness to set */
+#define ASLE_BCLP_VALID (1<<31)
+#define ASLE_BCLP_MSK (~(1<<31))
+
+/* ASLE panel fitting request */
+#define ASLE_PFIT_VALID (1<<31)
+#define ASLE_PFIT_CENTER (1<<0)
+#define ASLE_PFIT_STRETCH_TEXT (1<<1)
+#define ASLE_PFIT_STRETCH_GFX (1<<2)
+
+/* response bits of ASLE irq request */
+#define ASLE_ALS_ILLUM_FAILED (1<<10)
+#define ASLE_BACKLIGHT_FAILED (1<<12)
+#define ASLE_PFIT_FAILED (1<<14)
+#define ASLE_PWM_FREQ_FAILED (1<<16)
+
+/* ASLE backlight brightness to set */
+#define ASLE_BCLP_VALID (1<<31)
+#define ASLE_BCLP_MSK (~(1<<31))
+
+/* ASLE panel fitting request */
+#define ASLE_PFIT_VALID (1<<31)
+#define ASLE_PFIT_CENTER (1<<0)
+#define ASLE_PFIT_STRETCH_TEXT (1<<1)
+#define ASLE_PFIT_STRETCH_GFX (1<<2)
+
+/* PWM frequency and minimum brightness */
+#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
+#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
+#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
+#define ASLE_PFMB_PWM_VALID (1<<31)
+
+#define ASLE_CBLV_VALID (1<<31)
+
+static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct opregion_asle *asle = dev_priv->opregion.asle;
+ struct backlight_device *bd = dev_priv->backlight_device;
+
+ DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp);
+
+ if (!(bclp & ASLE_BCLP_VALID))
+ return ASLE_BACKLIGHT_FAILED;
+
+ if (bd == NULL)
+ return ASLE_BACKLIGHT_FAILED;
+
+ bclp &= ASLE_BCLP_MSK;
+ if (bclp > 255)
+ return ASLE_BACKLIGHT_FAILED;
+
+ if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) {
+ int max = bd->props.max_brightness;
+ bd->props.brightness = bclp * max / 255;
+ backlight_update_status(bd);
+ }
+
+ asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID;
+
+ return 0;
+}
+
+void psb_intel_opregion_asle_intr(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct opregion_asle *asle = dev_priv->opregion.asle;
+ u32 asle_stat = 0;
+ u32 asle_req;
+
+ if (!asle)
+ return;
+
+ asle_req = asle->aslc & ASLE_REQ_MSK;
+ if (!asle_req) {
+ DRM_DEBUG_DRIVER("non asle set request??\n");
+ return;
+ }
+
+ if (asle_req & ASLE_SET_BACKLIGHT)
+ asle_stat |= asle_set_backlight(dev, asle->bclp);
+
+ asle->aslc = asle_stat;
+}
+
+#define ASLE_ALS_EN (1<<0)
+#define ASLE_BLC_EN (1<<1)
+#define ASLE_PFIT_EN (1<<2)
+#define ASLE_PFMB_EN (1<<3)
+
+void psb_intel_opregion_enable_asle(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct opregion_asle *asle = dev_priv->opregion.asle;
+
+ if (asle) {
+ /* Don't do this on Medfield or other non PC like devices, they
+ use the bit for something different altogether */
+ psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
+ psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
+
+ asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN
+ | ASLE_PFMB_EN;
+ asle->ardy = 1;
+ }
+}
+
+#define ACPI_EV_DISPLAY_SWITCH (1<<0)
+#define ACPI_EV_LID (1<<1)
+#define ACPI_EV_DOCK (1<<2)
+
+static struct psb_intel_opregion *system_opregion;
+
+static int psb_intel_opregion_video_event(struct notifier_block *nb,
+ unsigned long val, void *data)
+{
+ /* The only video events relevant to opregion are 0x80. These indicate
+ either a docking event, lid switch or display switch request. In
+ Linux, these are handled by the dock, button and video drivers.
+ We might want to fix the video driver to be opregion-aware in
+ future, but right now we just indicate to the firmware that the
+ request has been handled */
+
+ struct opregion_acpi *acpi;
+
+ if (!system_opregion)
+ return NOTIFY_DONE;
+
+ acpi = system_opregion->acpi;
+ acpi->csts = 0;
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block psb_intel_opregion_notifier = {
+ .notifier_call = psb_intel_opregion_video_event,
+};
+
+void psb_intel_opregion_init(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_intel_opregion *opregion = &dev_priv->opregion;
+
+ if (!opregion->header)
+ return;
+
+ if (opregion->acpi) {
+ /* Notify BIOS we are ready to handle ACPI video ext notifs.
+ * Right now, all the events are handled by the ACPI video
+ * module. We don't actually need to do anything with them. */
+ opregion->acpi->csts = 0;
+ opregion->acpi->drdy = 1;
+
+ system_opregion = opregion;
+ register_acpi_notifier(&psb_intel_opregion_notifier);
+ }
+
+ if (opregion->asle)
+ psb_intel_opregion_enable_asle(dev);
+}
+
+void psb_intel_opregion_fini(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_intel_opregion *opregion = &dev_priv->opregion;
+
+ if (!opregion->header)
+ return;
+
+ if (opregion->acpi) {
+ opregion->acpi->drdy = 0;
+
+ system_opregion = NULL;
+ unregister_acpi_notifier(&psb_intel_opregion_notifier);
+ }
+
+ /* just clear all opregion memory pointers now */
+ iounmap(opregion->header);
+ opregion->header = NULL;
+ opregion->acpi = NULL;
+ opregion->swsci = NULL;
+ opregion->asle = NULL;
+ opregion->vbt = NULL;
+}
+
+int psb_intel_opregion_setup(struct drm_device *dev)
+{
+ struct drm_psb_private *dev_priv = dev->dev_private;
+ struct psb_intel_opregion *opregion = &dev_priv->opregion;
+ u32 opregion_phy, mboxes;
+ void __iomem *base;
+ int err = 0;
+
+ pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy);
+ if (opregion_phy == 0) {
+ DRM_DEBUG_DRIVER("ACPI Opregion not supported\n");
+ return -ENOTSUPP;
+ }
+ DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy);
+ base = acpi_os_ioremap(opregion_phy, 8*1024);
+ if (!base)
+ return -ENOMEM;
+
+ if (memcmp(base, OPREGION_SIGNATURE, 16)) {
+ DRM_DEBUG_DRIVER("opregion signature mismatch\n");
+ err = -EINVAL;
+ goto err_out;
+ }
+
+ opregion->header = base;
+ opregion->vbt = base + OPREGION_VBT_OFFSET;
+
+ opregion->lid_state = base + ACPI_CLID;
+
+ mboxes = opregion->header->mboxes;
+ if (mboxes & MBOX_ACPI) {
+ DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
+ opregion->acpi = base + OPREGION_ACPI_OFFSET;
+ }
+
+ if (mboxes & MBOX_ASLE) {
+ DRM_DEBUG_DRIVER("ASLE supported\n");
+ opregion->asle = base + OPREGION_ASLE_OFFSET;
+ }
+
+ return 0;
+
+err_out:
+ iounmap(base);
+ return err;
+}
+