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author | Mark Weiman | 2017-02-10 11:08:50 -0500 |
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committer | Mark Weiman | 2017-02-10 11:08:50 -0500 |
commit | a69e31c391f6bf199bfb5dc5a144f300904080dd (patch) | |
tree | ab49c989735532a4eb9ffa511fe6bd5f38b9eaa6 /i915-vga-arbiter.patch | |
parent | a3822e918190b8454286a46bef7839cde8e7690f (diff) | |
download | aur-a69e31c391f6bf199bfb5dc5a144f300904080dd.tar.gz |
Update to 4.9.8-1
Diffstat (limited to 'i915-vga-arbiter.patch')
-rw-r--r-- | i915-vga-arbiter.patch | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/i915-vga-arbiter.patch b/i915-vga-arbiter.patch new file mode 100644 index 000000000000..04b52e0cbef9 --- /dev/null +++ b/i915-vga-arbiter.patch @@ -0,0 +1,159 @@ +From bd149c5c439683f2b2bb011e6aa08c304ea4fe77 Mon Sep 17 00:00:00 2001 +From: Mark Weiman <mark.weiman@markzz.com> +Date: Fri, 10 Feb 2017 10:57:22 -0500 +Subject: [PATCH] i915: Add module option to support VGA arbiter on HD devices + +--- + drivers/gpu/drm/i915/i915_drv.c | 22 +++++++++++++++++++--- + drivers/gpu/drm/i915/i915_params.c | 5 +++++ + drivers/gpu/drm/i915/i915_params.h | 1 + + drivers/gpu/drm/i915/intel_display.c | 30 ++++++++++++++++++++++++++++++ + drivers/gpu/drm/i915/intel_drv.h | 1 + + 5 files changed, 56 insertions(+), 3 deletions(-) + +diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c +index 670beebc32f6..4250d27d0709 100644 +--- a/drivers/gpu/drm/i915/i915_drv.c ++++ b/drivers/gpu/drm/i915/i915_drv.c +@@ -585,10 +585,20 @@ static int i915_load_modeset_init(struct drm_device *dev) + * 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. ++ * ++ * NB. The set_decode callback here actually works on GMCH ++ * devices, on newer HD devices we can only disable VGA MMIO space. ++ * Disabling VGA I/O space requires disabling I/O in the PCI command ++ * register. Nonetheless, we like to pretend that we participate in ++ * VGA arbitration and can dynamically disable VGA I/O space because ++ * this makes X happy, even though it's a complete lie. + */ +- ret = vga_client_register(pdev, dev, NULL, i915_vga_set_decode); +- if (ret && ret != -ENODEV) +- goto out; ++ if (!i915.enable_hd_vgaarb || !HAS_PCH_SPLIT(dev)) { ++ ret = vga_client_register(dev->pdev, dev, NULL, ++ i915_vga_set_decode); ++ if (ret && ret != -ENODEV) ++ goto out; ++ } + + intel_register_dsm_handler(); + +@@ -628,6 +638,12 @@ static int i915_load_modeset_init(struct drm_device *dev) + if (ret) + goto cleanup_gem; + ++ /* ++ * Must do this after fbcon init so that ++ * vgacon_save_screen() works during the handover. ++ */ ++ i915_disable_vga_mem(dev); ++ + /* Only enable hotplug handling once the fbdev is fully set up. */ + intel_hpd_init(dev_priv); + +diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c +index 768ad89d9cd4..adb3a0188ae6 100644 +--- a/drivers/gpu/drm/i915/i915_params.c ++++ b/drivers/gpu/drm/i915/i915_params.c +@@ -50,6 +50,7 @@ struct i915_params i915 __read_mostly = { + .invert_brightness = 0, + .disable_display = 0, + .enable_cmd_parser = 1, ++ .enable_hd_vgaarb = false, + .use_mmio_flip = 0, + .mmio_debug = 0, + .verbose_state_checks = 1, +@@ -182,6 +183,10 @@ module_param_named_unsafe(enable_cmd_parser, i915.enable_cmd_parser, int, 0600); + MODULE_PARM_DESC(enable_cmd_parser, + "Enable command parsing (1=enabled [default], 0=disabled)"); + ++module_param_named(enable_hd_vgaarb, i915.enable_hd_vgaarb, bool, 0444); ++MODULE_PARM_DESC(enable_hd_vgaarb, ++ "Enable support for VGA arbitration on Intel HD IGD. (default: false)"); ++ + module_param_named_unsafe(use_mmio_flip, i915.use_mmio_flip, int, 0600); + MODULE_PARM_DESC(use_mmio_flip, + "use MMIO flips (-1=never, 0=driver discretion [default], 1=always)"); +diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h +index 3a0dd78ddb38..0a3af055b22f 100644 +--- a/drivers/gpu/drm/i915/i915_params.h ++++ b/drivers/gpu/drm/i915/i915_params.h +@@ -60,6 +60,7 @@ struct i915_params { + bool force_reset_modeset_test; + bool reset; + bool disable_display; ++ bool enable_hd_vgaarb; + bool verbose_state_checks; + bool nuclear_pageflip; + bool enable_dp_mst; +diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c +index 8079e5b380cb..d2593978c114 100644 +--- a/drivers/gpu/drm/i915/intel_display.c ++++ b/drivers/gpu/drm/i915/intel_display.c +@@ -16266,6 +16266,33 @@ static void i915_disable_vga(struct drm_device *dev) + POSTING_READ(vga_reg); + } + ++static void i915_enable_vga_mem(struct drm_device *dev) ++{ ++ /* Enable VGA memory on Intel HD */ ++ if (i915.enable_hd_vgaarb && HAS_PCH_SPLIT(dev)) { ++ vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); ++ outb(inb(VGA_MSR_READ) | VGA_MSR_MEM_EN, VGA_MSR_WRITE); ++ vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO | ++ VGA_RSRC_LEGACY_MEM | ++ VGA_RSRC_NORMAL_IO | ++ VGA_RSRC_NORMAL_MEM); ++ vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); ++ } ++} ++ ++void i915_disable_vga_mem(struct drm_device *dev) ++{ ++ /* Disable VGA memory on Intel HD */ ++ if (i915.enable_hd_vgaarb && HAS_PCH_SPLIT(dev)) { ++ vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO); ++ outb(inb(VGA_MSR_READ) & ~VGA_MSR_MEM_EN, VGA_MSR_WRITE); ++ vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO | ++ VGA_RSRC_NORMAL_IO | ++ VGA_RSRC_NORMAL_MEM); ++ vga_put(dev->pdev, VGA_RSRC_LEGACY_IO); ++ } ++} ++ + void intel_modeset_init_hw(struct drm_device *dev) + { + struct drm_i915_private *dev_priv = to_i915(dev); +@@ -16703,6 +16730,7 @@ void i915_redisable_vga_power_on(struct drm_device *dev) + if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) { + DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n"); + i915_disable_vga(dev); ++ i915_disable_vga_mem(dev); + } + } + +@@ -17063,6 +17091,8 @@ void intel_modeset_cleanup(struct drm_device *dev) + { + struct drm_i915_private *dev_priv = to_i915(dev); + ++ i915_enable_vga_mem(dev); ++ + intel_disable_gt_powersave(dev_priv); + + /* +diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h +index a19ec06f9e42..f02005f8b9a9 100644 +--- a/drivers/gpu/drm/i915/intel_drv.h ++++ b/drivers/gpu/drm/i915/intel_drv.h +@@ -1189,6 +1189,7 @@ int vlv_get_cck_clock(struct drm_i915_private *dev_priv, + void lpt_disable_pch_transcoder(struct drm_i915_private *dev_priv); + void lpt_disable_iclkip(struct drm_i915_private *dev_priv); + extern const struct drm_plane_funcs intel_plane_funcs; ++extern void i915_disable_vga_mem(struct drm_device *dev); + void intel_init_display_hooks(struct drm_i915_private *dev_priv); + unsigned int intel_fb_xy_to_linear(int x, int y, + const struct intel_plane_state *state, +-- +2.11.1 + |