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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
drm/i915/display: abstract all vgaarb access to intel_vga.[ch]
Split out the code related to vga client and vgaarb all over the place into new intel_vga.[ch]. No functional changes. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191001152506.7854-1-jani.nikula@intel.com
This commit is contained in:
parent
a4311745bb
commit
4fb8783165
10 changed files with 194 additions and 146 deletions
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@ -184,7 +184,8 @@ i915-y += \
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display/intel_psr.o \
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display/intel_quirks.o \
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display/intel_sprite.o \
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display/intel_tc.o
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display/intel_tc.o \
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display/intel_vga.o
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i915-$(CONFIG_ACPI) += \
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display/intel_acpi.o \
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display/intel_opregion.o
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@ -31,7 +31,6 @@
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#include <linux/module.h>
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#include <linux/dma-resv.h>
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#include <linux/slab.h>
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#include <linux/vgaarb.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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@ -79,6 +78,7 @@
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#include "intel_sideband.h"
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#include "intel_sprite.h"
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#include "intel_tc.h"
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#include "intel_vga.h"
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/* Primary plane formats for gen <= 3 */
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static const u32 i8xx_primary_formats[] = {
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@ -4241,7 +4241,7 @@ __intel_display_resume(struct drm_device *dev,
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int i, ret;
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intel_modeset_setup_hw_state(dev, ctx);
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i915_redisable_vga(to_i915(dev));
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intel_vga_redisable(to_i915(dev));
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if (!state)
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return 0;
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@ -15994,35 +15994,6 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
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}
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static i915_reg_t i915_vgacntrl_reg(struct drm_i915_private *dev_priv)
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{
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if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
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return VLV_VGACNTRL;
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else if (INTEL_GEN(dev_priv) >= 5)
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return CPU_VGACNTRL;
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else
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return VGACNTRL;
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}
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/* Disable the VGA plane that we never use */
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static void i915_disable_vga(struct drm_i915_private *dev_priv)
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{
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struct pci_dev *pdev = dev_priv->drm.pdev;
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u8 sr1;
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i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
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/* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */
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vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
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outb(SR01, VGA_SR_INDEX);
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sr1 = inb(VGA_SR_DATA);
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outb(sr1 | 1<<5, VGA_SR_DATA);
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vga_put(pdev, VGA_RSRC_LEGACY_IO);
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udelay(300);
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I915_WRITE(vga_reg, VGA_DISP_DISABLE);
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POSTING_READ(vga_reg);
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}
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void intel_modeset_init_hw(struct drm_i915_private *i915)
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{
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intel_update_cdclk(i915);
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@ -16288,7 +16259,7 @@ int intel_modeset_init(struct drm_i915_private *i915)
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intel_update_max_cdclk(i915);
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/* Just disable it once at startup */
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i915_disable_vga(i915);
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intel_vga_disable(i915);
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intel_setup_outputs(i915);
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drm_modeset_lock_all(dev);
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@ -16647,39 +16618,6 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
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icl_sanitize_encoder_pll_mapping(encoder);
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}
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void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv)
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{
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i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
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if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
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DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
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i915_disable_vga(dev_priv);
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}
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}
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void i915_redisable_vga(struct drm_i915_private *dev_priv)
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{
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intel_wakeref_t wakeref;
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/*
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* This function can be called both from intel_modeset_setup_hw_state or
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* at a very early point in our resume sequence, where the power well
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* structures are not yet restored. Since this function is at a very
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* paranoid "someone might have enabled VGA while we were not looking"
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* level, just check if the power well is enabled instead of trying to
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* follow the "don't touch the power well if we don't need it" policy
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* the rest of the driver uses.
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*/
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wakeref = intel_display_power_get_if_enabled(dev_priv,
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POWER_DOMAIN_VGA);
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if (!wakeref)
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return;
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i915_redisable_vga_power_on(dev_priv);
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intel_display_power_put(dev_priv, POWER_DOMAIN_VGA, wakeref);
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}
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/* FIXME read out full plane state for all planes */
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static void readout_plane_state(struct drm_i915_private *dev_priv)
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{
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@ -17188,35 +17126,6 @@ void intel_modeset_driver_remove(struct drm_i915_private *i915)
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intel_fbc_cleanup_cfb(i915);
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}
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/*
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* set vga decode state - true == enable VGA decode
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*/
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int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv, bool state)
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{
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unsigned reg = INTEL_GEN(dev_priv) >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
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u16 gmch_ctrl;
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if (pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl)) {
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DRM_ERROR("failed to read control word\n");
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return -EIO;
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}
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if (!!(gmch_ctrl & INTEL_GMCH_VGA_DISABLE) == !state)
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return 0;
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if (state)
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gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
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else
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gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
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if (pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl)) {
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DRM_ERROR("failed to write control word\n");
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return -EIO;
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}
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return 0;
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}
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#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
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struct intel_display_error_state {
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@ -579,10 +579,7 @@ void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
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void intel_modeset_init_hw(struct drm_i915_private *i915);
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int intel_modeset_init(struct drm_i915_private *i915);
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void intel_modeset_driver_remove(struct drm_i915_private *i915);
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int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv, bool state);
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void intel_display_resume(struct drm_device *dev);
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void i915_redisable_vga(struct drm_i915_private *dev_priv);
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void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv);
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void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
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/* modesetting asserts */
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@ -3,8 +3,6 @@
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* Copyright © 2019 Intel Corporation
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*/
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#include <linux/vgaarb.h>
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#include "display/intel_crt.h"
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#include "display/intel_dp.h"
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@ -19,6 +17,7 @@
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#include "intel_hotplug.h"
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#include "intel_sideband.h"
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#include "intel_tc.h"
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#include "intel_vga.h"
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bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
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enum i915_power_well_id power_well_id);
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@ -267,23 +266,8 @@ bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
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static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
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u8 irq_pipe_mask, bool has_vga)
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{
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struct pci_dev *pdev = dev_priv->drm.pdev;
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/*
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* After we re-enable the power well, if we touch VGA register 0x3d5
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* we'll get unclaimed register interrupts. This stops after we write
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* anything to the VGA MSR register. The vgacon module uses this
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* register all the time, so if we unbind our driver and, as a
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* consequence, bind vgacon, we'll get stuck in an infinite loop at
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* console_unlock(). So make here we touch the VGA MSR register, making
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* sure vgacon can keep working normally without triggering interrupts
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* and error messages.
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*/
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if (has_vga) {
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vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
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outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
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vga_put(pdev, VGA_RSRC_LEGACY_IO);
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}
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if (has_vga)
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intel_vga_msr_write(dev_priv);
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if (irq_pipe_mask)
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gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
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@ -1205,7 +1189,7 @@ static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
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intel_crt_reset(&encoder->base);
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}
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i915_redisable_vga_power_on(dev_priv);
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intel_vga_redisable_power_on(dev_priv);
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intel_pps_unlock_regs_wa(dev_priv);
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}
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160
drivers/gpu/drm/i915/display/intel_vga.c
Normal file
160
drivers/gpu/drm/i915/display/intel_vga.c
Normal file
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@ -0,0 +1,160 @@
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#include <linux/pci.h>
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#include <linux/vgaarb.h>
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#include <drm/i915_drm.h>
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#include "i915_drv.h"
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#include "intel_vga.h"
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static i915_reg_t intel_vga_cntrl_reg(struct drm_i915_private *i915)
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{
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if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
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return VLV_VGACNTRL;
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else if (INTEL_GEN(i915) >= 5)
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return CPU_VGACNTRL;
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else
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return VGACNTRL;
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}
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/* Disable the VGA plane that we never use */
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void intel_vga_disable(struct drm_i915_private *dev_priv)
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{
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struct pci_dev *pdev = dev_priv->drm.pdev;
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i915_reg_t vga_reg = intel_vga_cntrl_reg(dev_priv);
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u8 sr1;
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/* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */
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vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
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outb(SR01, VGA_SR_INDEX);
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sr1 = inb(VGA_SR_DATA);
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outb(sr1 | 1 << 5, VGA_SR_DATA);
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vga_put(pdev, VGA_RSRC_LEGACY_IO);
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udelay(300);
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I915_WRITE(vga_reg, VGA_DISP_DISABLE);
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POSTING_READ(vga_reg);
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}
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void intel_vga_redisable_power_on(struct drm_i915_private *dev_priv)
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{
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i915_reg_t vga_reg = intel_vga_cntrl_reg(dev_priv);
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if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
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DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
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intel_vga_disable(dev_priv);
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}
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}
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void intel_vga_redisable(struct drm_i915_private *i915)
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{
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intel_wakeref_t wakeref;
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/*
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* This function can be called both from intel_modeset_setup_hw_state or
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* at a very early point in our resume sequence, where the power well
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* structures are not yet restored. Since this function is at a very
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* paranoid "someone might have enabled VGA while we were not looking"
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* level, just check if the power well is enabled instead of trying to
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* follow the "don't touch the power well if we don't need it" policy
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* the rest of the driver uses.
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*/
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wakeref = intel_display_power_get_if_enabled(i915, POWER_DOMAIN_VGA);
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if (!wakeref)
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return;
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intel_vga_redisable_power_on(i915);
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intel_display_power_put(i915, POWER_DOMAIN_VGA, wakeref);
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}
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void intel_vga_msr_write(struct drm_i915_private *i915)
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{
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struct pci_dev *pdev = i915->drm.pdev;
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/*
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* After we re-enable the power well, if we touch VGA register 0x3d5
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* we'll get unclaimed register interrupts. This stops after we write
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* anything to the VGA MSR register. The vgacon module uses this
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* register all the time, so if we unbind our driver and, as a
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* consequence, bind vgacon, we'll get stuck in an infinite loop at
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* console_unlock(). So make here we touch the VGA MSR register, making
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* sure vgacon can keep working normally without triggering interrupts
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* and error messages.
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*/
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vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
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outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
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vga_put(pdev, VGA_RSRC_LEGACY_IO);
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}
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static int
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intel_vga_set_state(struct drm_i915_private *i915, bool enable_decode)
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{
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unsigned int reg = INTEL_GEN(i915) >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
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u16 gmch_ctrl;
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if (pci_read_config_word(i915->bridge_dev, reg, &gmch_ctrl)) {
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DRM_ERROR("failed to read control word\n");
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return -EIO;
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}
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if (!!(gmch_ctrl & INTEL_GMCH_VGA_DISABLE) == !enable_decode)
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return 0;
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if (enable_decode)
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gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
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else
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gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
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if (pci_write_config_word(i915->bridge_dev, reg, gmch_ctrl)) {
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DRM_ERROR("failed to write control word\n");
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return -EIO;
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}
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return 0;
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}
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static unsigned int
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intel_vga_set_decode(void *cookie, bool enable_decode)
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{
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struct drm_i915_private *i915 = cookie;
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intel_vga_set_state(i915, enable_decode);
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if (enable_decode)
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return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
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VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
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else
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return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
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}
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int intel_vga_register(struct drm_i915_private *i915)
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{
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struct pci_dev *pdev = i915->drm.pdev;
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int ret;
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/*
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* If we have > 1 VGA cards, then we need to arbitrate access to the
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* common VGA resources.
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*
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* If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
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* then we do not take part in VGA arbitration and the
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* vga_client_register() fails with -ENODEV.
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*/
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ret = vga_client_register(pdev, i915, NULL, intel_vga_set_decode);
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if (ret && ret != -ENODEV)
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return ret;
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return 0;
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}
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void intel_vga_unregister(struct drm_i915_private *i915)
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{
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struct pci_dev *pdev = i915->drm.pdev;
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vga_client_register(pdev, NULL, NULL, NULL);
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}
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18
drivers/gpu/drm/i915/display/intel_vga.h
Normal file
18
drivers/gpu/drm/i915/display/intel_vga.h
Normal file
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@ -0,0 +1,18 @@
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/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2019 Intel Corporation
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*/
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#ifndef __INTEL_VGA_H__
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#define __INTEL_VGA_H__
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struct drm_i915_private;
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void intel_vga_msr_write(struct drm_i915_private *i915);
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void intel_vga_disable(struct drm_i915_private *i915);
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void intel_vga_redisable(struct drm_i915_private *i915);
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void intel_vga_redisable_power_on(struct drm_i915_private *i915);
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int intel_vga_register(struct drm_i915_private *i915);
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void intel_vga_unregister(struct drm_i915_private *i915);
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#endif /* __INTEL_VGA_H__ */
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@ -36,7 +36,6 @@
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#include <linux/pm_runtime.h>
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#include <linux/pnp.h>
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#include <linux/slab.h>
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#include <linux/vgaarb.h>
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#include <linux/vga_switcheroo.h>
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#include <linux/vt.h>
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#include <acpi/video.h>
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@ -59,6 +58,7 @@
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#include "display/intel_overlay.h"
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#include "display/intel_pipe_crc.h"
|
||||
#include "display/intel_sprite.h"
|
||||
#include "display/intel_vga.h"
|
||||
|
||||
#include "gem/i915_gem_context.h"
|
||||
#include "gem/i915_gem_ioctls.h"
|
||||
|
@ -269,19 +269,6 @@ intel_teardown_mchbar(struct drm_i915_private *dev_priv)
|
|||
release_resource(&dev_priv->mch_res);
|
||||
}
|
||||
|
||||
/* true = enable decode, false = disable decoder */
|
||||
static unsigned int i915_vga_set_decode(void *cookie, bool state)
|
||||
{
|
||||
struct drm_i915_private *dev_priv = cookie;
|
||||
|
||||
intel_modeset_vga_set_state(dev_priv, state);
|
||||
if (state)
|
||||
return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
|
||||
VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
|
||||
else
|
||||
return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
|
||||
}
|
||||
|
||||
static int i915_resume_switcheroo(struct drm_i915_private *i915);
|
||||
static int i915_suspend_switcheroo(struct drm_i915_private *i915,
|
||||
pm_message_t state);
|
||||
|
@ -346,15 +333,8 @@ static int i915_driver_modeset_probe(struct drm_i915_private *i915)
|
|||
|
||||
intel_bios_init(i915);
|
||||
|
||||
/* If we have > 1 VGA cards, then we need to arbitrate access
|
||||
* to the common VGA resources.
|
||||
*
|
||||
* If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),
|
||||
* then we do not take part in VGA arbitration and the
|
||||
* vga_client_register() fails with -ENODEV.
|
||||
*/
|
||||
ret = vga_client_register(pdev, i915, NULL, i915_vga_set_decode);
|
||||
if (ret && ret != -ENODEV)
|
||||
ret = intel_vga_register(i915);
|
||||
if (ret)
|
||||
goto out;
|
||||
|
||||
intel_register_dsm_handler();
|
||||
|
@ -416,7 +396,7 @@ static int i915_driver_modeset_probe(struct drm_i915_private *i915)
|
|||
intel_power_domains_driver_remove(i915);
|
||||
vga_switcheroo_unregister_client(pdev);
|
||||
cleanup_vga_client:
|
||||
vga_client_register(pdev, NULL, NULL, NULL);
|
||||
intel_vga_unregister(i915);
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
@ -455,7 +435,7 @@ static void i915_driver_modeset_remove(struct drm_i915_private *i915)
|
|||
intel_bios_driver_remove(i915);
|
||||
|
||||
vga_switcheroo_unregister_client(pdev);
|
||||
vga_client_register(pdev, NULL, NULL, NULL);
|
||||
intel_vga_unregister(i915);
|
||||
|
||||
intel_csr_ucode_fini(i915);
|
||||
}
|
||||
|
|
|
@ -23,7 +23,6 @@
|
|||
*/
|
||||
|
||||
#include <linux/console.h>
|
||||
#include <linux/vgaarb.h>
|
||||
#include <linux/vga_switcheroo.h>
|
||||
|
||||
#include <drm/drm_drv.h>
|
||||
|
|
|
@ -28,6 +28,7 @@
|
|||
|
||||
#include "display/intel_fbc.h"
|
||||
#include "display/intel_gmbus.h"
|
||||
#include "display/intel_vga.h"
|
||||
|
||||
#include "i915_drv.h"
|
||||
#include "i915_reg.h"
|
||||
|
@ -57,7 +58,7 @@ static void i915_restore_display(struct drm_i915_private *dev_priv)
|
|||
if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) <= 4 && !IS_G4X(dev_priv))
|
||||
I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL);
|
||||
|
||||
i915_redisable_vga(dev_priv);
|
||||
intel_vga_redisable(dev_priv);
|
||||
}
|
||||
|
||||
int i915_save_state(struct drm_i915_private *dev_priv)
|
||||
|
|
|
@ -27,7 +27,6 @@
|
|||
*/
|
||||
|
||||
#include <linux/pm_runtime.h>
|
||||
#include <linux/vgaarb.h>
|
||||
|
||||
#include <drm/drm_print.h>
|
||||
|
||||
|
|
Loading…
Reference in a new issue