Add Intel ACPI IGD OpRegion support
This adds the support necessary for allowing ACPI backlight control to work on some newer Intel-based graphics systems. Tested on Thinkpad T61 and HP 2510p hardware. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Matthew Garrett
Dave Airlie
Родитель
398c9cb20b
Коммит
8ee1c3db90
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@ -3,7 +3,7 @@
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# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
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ccflags-y := -Iinclude/drm
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i915-y := i915_drv.o i915_dma.o i915_irq.o i915_mem.o
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i915-y := i915_drv.o i915_dma.o i915_irq.o i915_mem.o i915_opregion.o
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i915-$(CONFIG_COMPAT) += i915_ioc32.o
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@ -810,6 +810,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
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if (!IS_I945G(dev) && !IS_I945GM(dev))
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pci_enable_msi(dev->pdev);
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intel_opregion_init(dev);
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spin_lock_init(&dev_priv->user_irq_lock);
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return ret;
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@ -827,6 +829,8 @@ int i915_driver_unload(struct drm_device *dev)
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if (dev_priv->mmio_map)
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drm_rmmap(dev, dev_priv->mmio_map);
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intel_opregion_free(dev);
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drm_free(dev->dev_private, sizeof(drm_i915_private_t),
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DRM_MEM_DRIVER);
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@ -371,6 +371,8 @@ static int i915_suspend(struct drm_device *dev, pm_message_t state)
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i915_save_vga(dev);
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intel_opregion_free(dev);
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if (state.event == PM_EVENT_SUSPEND) {
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/* Shut down the device */
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pci_disable_device(dev->pdev);
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@ -532,6 +534,8 @@ static int i915_resume(struct drm_device *dev)
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i915_restore_vga(dev);
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intel_opregion_init(dev);
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return 0;
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}
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@ -82,6 +82,14 @@ typedef struct _drm_i915_vbl_swap {
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unsigned int sequence;
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} drm_i915_vbl_swap_t;
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struct intel_opregion {
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struct opregion_header *header;
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struct opregion_acpi *acpi;
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struct opregion_swsci *swsci;
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struct opregion_asle *asle;
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int enabled;
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};
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typedef struct drm_i915_private {
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drm_local_map_t *sarea;
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drm_local_map_t *mmio_map;
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@ -122,6 +130,8 @@ typedef struct drm_i915_private {
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drm_i915_vbl_swap_t vbl_swaps;
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unsigned int swaps_pending;
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struct intel_opregion opregion;
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/* Register state */
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u8 saveLBB;
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u32 saveDSPACNTR;
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@ -244,6 +254,7 @@ extern int i915_vblank_pipe_get(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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extern int i915_vblank_swap(struct drm_device *dev, void *data,
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struct drm_file *file_priv);
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extern void i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask);
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/* i915_mem.c */
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extern int i915_mem_alloc(struct drm_device *dev, void *data,
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@ -258,6 +269,12 @@ extern void i915_mem_takedown(struct mem_block **heap);
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extern void i915_mem_release(struct drm_device * dev,
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struct drm_file *file_priv, struct mem_block *heap);
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/* i915_opregion.c */
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extern int intel_opregion_init(struct drm_device *dev);
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extern void intel_opregion_free(struct drm_device *dev);
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extern void opregion_asle_intr(struct drm_device *dev);
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extern void opregion_enable_asle(struct drm_device *dev);
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#define I915_READ(reg) DRM_READ32(dev_priv->mmio_map, (reg))
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#define I915_WRITE(reg,val) DRM_WRITE32(dev_priv->mmio_map, (reg), (val))
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#define I915_READ16(reg) DRM_READ16(dev_priv->mmio_map, (reg))
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@ -36,9 +36,11 @@
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/** These are the interrupts used by the driver */
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#define I915_INTERRUPT_ENABLE_MASK (I915_USER_INTERRUPT | \
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I915_DISPLAY_PIPE_A_VBLANK_INTERRUPT | \
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I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT)
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I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT | \
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I915_ASLE_INTERRUPT | \
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I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
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static inline void
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void
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i915_enable_irq(drm_i915_private_t *dev_priv, u32 mask)
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{
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if ((dev_priv->irq_mask_reg & mask) != 0) {
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@ -274,6 +276,9 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
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return IRQ_NONE;
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}
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I915_WRITE(PIPEASTAT, pipea_stats);
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I915_WRITE(PIPEBSTAT, pipeb_stats);
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I915_WRITE(IIR, iir);
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if (dev->pdev->msi_enabled)
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I915_WRITE(IMR, dev_priv->irq_mask_reg);
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@ -306,14 +311,14 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
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if (dev_priv->swaps_pending > 0)
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drm_locked_tasklet(dev, i915_vblank_tasklet);
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I915_WRITE(PIPEASTAT,
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pipea_stats|I915_VBLANK_INTERRUPT_ENABLE|
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PIPE_VBLANK_INTERRUPT_STATUS);
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I915_WRITE(PIPEBSTAT,
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pipeb_stats|I915_VBLANK_INTERRUPT_ENABLE|
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PIPE_VBLANK_INTERRUPT_STATUS);
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}
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if (iir & I915_ASLE_INTERRUPT)
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opregion_asle_intr(dev);
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if (iir & I915_DISPLAY_PIPE_B_EVENT_INTERRUPT)
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opregion_asle_intr(dev);
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return IRQ_HANDLED;
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}
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@ -661,10 +666,14 @@ void i915_driver_irq_postinstall(struct drm_device * dev)
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if (dev_priv->vblank_pipe & DRM_I915_VBLANK_PIPE_B)
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dev_priv->irq_mask_reg &= ~I915_DISPLAY_PIPE_B_VBLANK_INTERRUPT;
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dev_priv->irq_mask_reg &= I915_INTERRUPT_ENABLE_MASK;
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I915_WRITE(IMR, dev_priv->irq_mask_reg);
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I915_WRITE(IER, I915_INTERRUPT_ENABLE_MASK);
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(void) I915_READ(IER);
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opregion_enable_asle(dev);
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DRM_INIT_WAITQUEUE(&dev_priv->irq_queue);
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}
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@ -0,0 +1,371 @@
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/*
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* Copyright 2008 Intel Corporation <hong.liu@intel.com>
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* Copyright 2008 Red Hat <mjg@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#include <linux/acpi.h>
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#include "drmP.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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#define PCI_ASLE 0xe4
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#define PCI_LBPC 0xf4
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#define PCI_ASLS 0xfc
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#define OPREGION_SZ (8*1024)
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#define OPREGION_HEADER_OFFSET 0
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#define OPREGION_ACPI_OFFSET 0x100
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#define OPREGION_SWSCI_OFFSET 0x200
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#define OPREGION_ASLE_OFFSET 0x300
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#define OPREGION_VBT_OFFSET 0x1000
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#define OPREGION_SIGNATURE "IntelGraphicsMem"
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#define MBOX_ACPI (1<<0)
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#define MBOX_SWSCI (1<<1)
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#define MBOX_ASLE (1<<2)
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struct opregion_header {
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u8 signature[16];
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u32 size;
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u32 opregion_ver;
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u8 bios_ver[32];
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u8 vbios_ver[16];
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u8 driver_ver[16];
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u32 mboxes;
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u8 reserved[164];
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} __attribute__((packed));
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/* OpRegion mailbox #1: public ACPI methods */
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struct opregion_acpi {
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u32 drdy; /* driver readiness */
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u32 csts; /* notification status */
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u32 cevt; /* current event */
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u8 rsvd1[20];
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u32 didl[8]; /* supported display devices ID list */
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u32 cpdl[8]; /* currently presented display list */
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u32 cadl[8]; /* currently active display list */
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u32 nadl[8]; /* next active devices list */
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u32 aslp; /* ASL sleep time-out */
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u32 tidx; /* toggle table index */
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u32 chpd; /* current hotplug enable indicator */
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u32 clid; /* current lid state*/
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u32 cdck; /* current docking state */
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u32 sxsw; /* Sx state resume */
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u32 evts; /* ASL supported events */
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u32 cnot; /* current OS notification */
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u32 nrdy; /* driver status */
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u8 rsvd2[60];
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} __attribute__((packed));
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/* OpRegion mailbox #2: SWSCI */
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struct opregion_swsci {
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u32 scic; /* SWSCI command|status|data */
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u32 parm; /* command parameters */
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u32 dslp; /* driver sleep time-out */
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u8 rsvd[244];
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} __attribute__((packed));
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/* OpRegion mailbox #3: ASLE */
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struct opregion_asle {
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u32 ardy; /* driver readiness */
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u32 aslc; /* ASLE interrupt command */
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u32 tche; /* technology enabled indicator */
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u32 alsi; /* current ALS illuminance reading */
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u32 bclp; /* backlight brightness to set */
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u32 pfit; /* panel fitting state */
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u32 cblv; /* current brightness level */
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u16 bclm[20]; /* backlight level duty cycle mapping table */
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u32 cpfm; /* current panel fitting mode */
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u32 epfm; /* enabled panel fitting modes */
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u8 plut[74]; /* panel LUT and identifier */
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u32 pfmb; /* PWM freq and min brightness */
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u8 rsvd[102];
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} __attribute__((packed));
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/* ASLE irq request bits */
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#define ASLE_SET_ALS_ILLUM (1 << 0)
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#define ASLE_SET_BACKLIGHT (1 << 1)
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#define ASLE_SET_PFIT (1 << 2)
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#define ASLE_SET_PWM_FREQ (1 << 3)
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#define ASLE_REQ_MSK 0xf
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/* response bits of ASLE irq request */
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#define ASLE_ALS_ILLUM_FAIL (2<<10)
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#define ASLE_BACKLIGHT_FAIL (2<<12)
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#define ASLE_PFIT_FAIL (2<<14)
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#define ASLE_PWM_FREQ_FAIL (2<<16)
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/* ASLE backlight brightness to set */
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#define ASLE_BCLP_VALID (1<<31)
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#define ASLE_BCLP_MSK (~(1<<31))
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/* ASLE panel fitting request */
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#define ASLE_PFIT_VALID (1<<31)
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#define ASLE_PFIT_CENTER (1<<0)
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#define ASLE_PFIT_STRETCH_TEXT (1<<1)
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#define ASLE_PFIT_STRETCH_GFX (1<<2)
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/* PWM frequency and minimum brightness */
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#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
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#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
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#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
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#define ASLE_PFMB_PWM_VALID (1<<31)
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#define ASLE_CBLV_VALID (1<<31)
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static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct opregion_asle *asle = dev_priv->opregion.asle;
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u32 blc_pwm_ctl, blc_pwm_ctl2;
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if (!(bclp & ASLE_BCLP_VALID))
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return ASLE_BACKLIGHT_FAIL;
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bclp &= ASLE_BCLP_MSK;
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if (bclp < 0 || bclp > 255)
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return ASLE_BACKLIGHT_FAIL;
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blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
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blc_pwm_ctl &= ~BACKLIGHT_DUTY_CYCLE_MASK;
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blc_pwm_ctl2 = I915_READ(BLC_PWM_CTL2);
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if (blc_pwm_ctl2 & BLM_COMBINATION_MODE)
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pci_write_config_dword(dev->pdev, PCI_LBPC, bclp);
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else
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I915_WRITE(BLC_PWM_CTL, blc_pwm_ctl | ((bclp * 0x101)-1));
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asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
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return 0;
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}
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static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
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{
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/* alsi is the current ALS reading in lux. 0 indicates below sensor
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range, 0xffff indicates above sensor range. 1-0xfffe are valid */
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return 0;
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}
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static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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if (pfmb & ASLE_PFMB_PWM_VALID) {
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u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
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u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
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blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
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pwm = pwm >> 9;
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/* FIXME - what do we do with the PWM? */
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}
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return 0;
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}
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static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
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{
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/* Panel fitting is currently controlled by the X code, so this is a
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noop until modesetting support works fully */
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if (!(pfit & ASLE_PFIT_VALID))
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return ASLE_PFIT_FAIL;
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return 0;
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}
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void opregion_asle_intr(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct opregion_asle *asle = dev_priv->opregion.asle;
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u32 asle_stat = 0;
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u32 asle_req;
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if (!asle)
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return;
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asle_req = asle->aslc & ASLE_REQ_MSK;
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if (!asle_req) {
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DRM_DEBUG("non asle set request??\n");
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return;
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}
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if (asle_req & ASLE_SET_ALS_ILLUM)
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asle_stat |= asle_set_als_illum(dev, asle->alsi);
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if (asle_req & ASLE_SET_BACKLIGHT)
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asle_stat |= asle_set_backlight(dev, asle->bclp);
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if (asle_req & ASLE_SET_PFIT)
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asle_stat |= asle_set_pfit(dev, asle->pfit);
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if (asle_req & ASLE_SET_PWM_FREQ)
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asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
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asle->aslc = asle_stat;
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}
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#define ASLE_ALS_EN (1<<0)
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#define ASLE_BLC_EN (1<<1)
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#define ASLE_PFIT_EN (1<<2)
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#define ASLE_PFMB_EN (1<<3)
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void opregion_enable_asle(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct opregion_asle *asle = dev_priv->opregion.asle;
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if (asle) {
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u32 pipeb_stats = I915_READ(PIPEBSTAT);
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if (IS_MOBILE(dev)) {
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/* Many devices trigger events with a write to the
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legacy backlight controller, so we need to ensure
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that it's able to generate interrupts */
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I915_WRITE(PIPEBSTAT, pipeb_stats |=
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I915_LEGACY_BLC_EVENT_ENABLE);
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i915_enable_irq(dev_priv, I915_ASLE_INTERRUPT |
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I915_DISPLAY_PIPE_B_EVENT_INTERRUPT);
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} else
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i915_enable_irq(dev_priv, I915_ASLE_INTERRUPT);
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asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
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ASLE_PFMB_EN;
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asle->ardy = 1;
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}
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}
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#define ACPI_EV_DISPLAY_SWITCH (1<<0)
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#define ACPI_EV_LID (1<<1)
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#define ACPI_EV_DOCK (1<<2)
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static struct intel_opregion *system_opregion;
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int intel_opregion_video_event(struct notifier_block *nb, unsigned long val,
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void *data)
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{
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/* The only video events relevant to opregion are 0x80. These indicate
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||||
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 intel_opregion_notifier = {
|
||||
.notifier_call = intel_opregion_video_event,
|
||||
};
|
||||
|
||||
int intel_opregion_init(struct drm_device *dev)
|
||||
{
|
||||
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||
struct intel_opregion *opregion = &dev_priv->opregion;
|
||||
void *base;
|
||||
u32 asls, mboxes;
|
||||
int err = 0;
|
||||
|
||||
pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
|
||||
DRM_DEBUG("graphic opregion physical addr: 0x%x\n", asls);
|
||||
if (asls == 0) {
|
||||
DRM_DEBUG("ACPI OpRegion not supported!\n");
|
||||
return -ENOTSUPP;
|
||||
}
|
||||
|
||||
base = ioremap(asls, OPREGION_SZ);
|
||||
if (!base)
|
||||
return -ENOMEM;
|
||||
|
||||
opregion->header = base;
|
||||
if (memcmp(opregion->header->signature, OPREGION_SIGNATURE, 16)) {
|
||||
DRM_DEBUG("opregion signature mismatch\n");
|
||||
err = -EINVAL;
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
mboxes = opregion->header->mboxes;
|
||||
if (mboxes & MBOX_ACPI) {
|
||||
DRM_DEBUG("Public ACPI methods supported\n");
|
||||
opregion->acpi = base + OPREGION_ACPI_OFFSET;
|
||||
} else {
|
||||
DRM_DEBUG("Public ACPI methods not supported\n");
|
||||
err = -ENOTSUPP;
|
||||
goto err_out;
|
||||
}
|
||||
opregion->enabled = 1;
|
||||
|
||||
if (mboxes & MBOX_SWSCI) {
|
||||
DRM_DEBUG("SWSCI supported\n");
|
||||
opregion->swsci = base + OPREGION_SWSCI_OFFSET;
|
||||
}
|
||||
if (mboxes & MBOX_ASLE) {
|
||||
DRM_DEBUG("ASLE supported\n");
|
||||
opregion->asle = base + OPREGION_ASLE_OFFSET;
|
||||
}
|
||||
|
||||
/* 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(&intel_opregion_notifier);
|
||||
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
iounmap(opregion->header);
|
||||
opregion->header = NULL;
|
||||
return err;
|
||||
}
|
||||
|
||||
void intel_opregion_free(struct drm_device *dev)
|
||||
{
|
||||
struct drm_i915_private *dev_priv = dev->dev_private;
|
||||
struct intel_opregion *opregion = &dev_priv->opregion;
|
||||
|
||||
if (!opregion->enabled)
|
||||
return;
|
||||
|
||||
opregion->acpi->drdy = 0;
|
||||
|
||||
system_opregion = NULL;
|
||||
unregister_acpi_notifier(&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->enabled = 0;
|
||||
}
|
||||
|
|
@ -740,6 +740,7 @@
|
|||
#define BLC_PWM_CTL 0x61254
|
||||
#define BACKLIGHT_MODULATION_FREQ_SHIFT (17)
|
||||
#define BLC_PWM_CTL2 0x61250 /* 965+ only */
|
||||
#define BLM_COMBINATION_MODE (1 << 30)
|
||||
/*
|
||||
* This is the most significant 15 bits of the number of backlight cycles in a
|
||||
* complete cycle of the modulated backlight control.
|
||||
|
|
|
|||
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