+++ /dev/null
-/*
- * hda_i915.c - routines for Haswell HDA controller power well support
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/component.h>
-#include <drm/i915_component.h>
-#include <sound/core.h>
-#include "hda_controller.h"
-#include "hda_intel.h"
-
-/* Intel HSW/BDW display HDA controller Extended Mode registers.
- * EM4 (M value) and EM5 (N Value) are used to convert CDClk (Core Display
- * Clock) to 24MHz BCLK: BCLK = CDCLK * M / N
- * The values will be lost when the display power well is disabled.
- */
-#define AZX_REG_EM4 0x100c
-#define AZX_REG_EM5 0x1010
-
-int hda_display_power(struct hda_intel *hda, bool enable)
-{
- struct i915_audio_component *acomp = &hda->audio_component;
-
- if (!acomp->ops)
- return -ENODEV;
-
- dev_dbg(&hda->chip.pci->dev, "display power %s\n",
- enable ? "enable" : "disable");
- if (enable)
- acomp->ops->get_power(acomp->dev);
- else
- acomp->ops->put_power(acomp->dev);
-
- return 0;
-}
-
-void haswell_set_bclk(struct hda_intel *hda)
-{
- int cdclk_freq;
- unsigned int bclk_m, bclk_n;
- struct i915_audio_component *acomp = &hda->audio_component;
- struct pci_dev *pci = hda->chip.pci;
-
- /* Only Haswell/Broadwell need set BCLK */
- if (pci->device != 0x0a0c && pci->device != 0x0c0c
- && pci->device != 0x0d0c && pci->device != 0x160c)
- return;
-
- if (!acomp->ops)
- return;
-
- cdclk_freq = acomp->ops->get_cdclk_freq(acomp->dev);
- switch (cdclk_freq) {
- case 337500:
- bclk_m = 16;
- bclk_n = 225;
- break;
-
- case 450000:
- default: /* default CDCLK 450MHz */
- bclk_m = 4;
- bclk_n = 75;
- break;
-
- case 540000:
- bclk_m = 4;
- bclk_n = 90;
- break;
-
- case 675000:
- bclk_m = 8;
- bclk_n = 225;
- break;
- }
-
- azx_writew(&hda->chip, EM4, bclk_m);
- azx_writew(&hda->chip, EM5, bclk_n);
-}
-
-static int hda_component_master_bind(struct device *dev)
-{
- struct snd_card *card = dev_get_drvdata(dev);
- struct azx *chip = card->private_data;
- struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
- struct i915_audio_component *acomp = &hda->audio_component;
- int ret;
-
- ret = component_bind_all(dev, acomp);
- if (ret < 0)
- return ret;
-
- if (WARN_ON(!(acomp->dev && acomp->ops && acomp->ops->get_power &&
- acomp->ops->put_power && acomp->ops->get_cdclk_freq))) {
- ret = -EINVAL;
- goto out_unbind;
- }
-
- /*
- * Atm, we don't support dynamic unbinding initiated by the child
- * component, so pin its containing module until we unbind.
- */
- if (!try_module_get(acomp->ops->owner)) {
- ret = -ENODEV;
- goto out_unbind;
- }
-
- return 0;
-
-out_unbind:
- component_unbind_all(dev, acomp);
-
- return ret;
-}
-
-static void hda_component_master_unbind(struct device *dev)
-{
- struct snd_card *card = dev_get_drvdata(dev);
- struct azx *chip = card->private_data;
- struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
- struct i915_audio_component *acomp = &hda->audio_component;
-
- module_put(acomp->ops->owner);
- component_unbind_all(dev, acomp);
- WARN_ON(acomp->ops || acomp->dev);
-}
-
-static const struct component_master_ops hda_component_master_ops = {
- .bind = hda_component_master_bind,
- .unbind = hda_component_master_unbind,
-};
-
-static int hda_component_master_match(struct device *dev, void *data)
-{
- /* i915 is the only supported component */
- return !strcmp(dev->driver->name, "i915");
-}
-
-int hda_i915_init(struct hda_intel *hda)
-{
- struct component_match *match = NULL;
- struct device *dev = &hda->chip.pci->dev;
- struct i915_audio_component *acomp = &hda->audio_component;
- int ret;
-
- component_match_add(dev, &match, hda_component_master_match, hda);
- ret = component_master_add_with_match(dev, &hda_component_master_ops,
- match);
- if (ret < 0)
- goto out_err;
-
- /*
- * Atm, we don't support deferring the component binding, so make sure
- * i915 is loaded and that the binding successfully completes.
- */
- request_module("i915");
-
- if (!acomp->ops) {
- ret = -ENODEV;
- goto out_master_del;
- }
-
- dev_dbg(dev, "bound to i915 component master\n");
-
- return 0;
-out_master_del:
- component_master_del(dev, &hda_component_master_ops);
-out_err:
- dev_err(dev, "failed to add i915 component master (%d)\n", ret);
-
- return ret;
-}
-
-int hda_i915_exit(struct hda_intel *hda)
-{
- struct device *dev = &hda->chip.pci->dev;
-
- component_master_del(dev, &hda_component_master_ops);
-
- return 0;
-}
Code Review / kvmfornfv.git / blobdiff