diff options
Diffstat (limited to '1002-i915-vga-arbiter.patch')
| -rw-r--r-- | 1002-i915-vga-arbiter.patch | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/1002-i915-vga-arbiter.patch b/1002-i915-vga-arbiter.patch new file mode 100644 index 000000000000..fc546d8a9791 --- /dev/null +++ b/1002-i915-vga-arbiter.patch @@ -0,0 +1,158 @@ +From 61009bd54ec93d15f9c26325cf5e5c68ac98becc Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?=C3=A9clairevoyant?= + <848000+eclairevoyant@users.noreply.github.com> +Date: Tue, 14 Mar 2023 17:07:40 -0400 +Subject: [PATCH 2/2] i915-vga-arbiter + +--- + drivers/gpu/drm/i915/display/intel_display.c | 15 ++++++++-- + drivers/gpu/drm/i915/display/intel_display.h | 1 + + drivers/gpu/drm/i915/display/intel_vga.c | 31 ++++++++++++++++++++ + drivers/gpu/drm/i915/display/intel_vga.h | 4 +++ + drivers/gpu/drm/i915/i915_params.c | 3 ++ + drivers/gpu/drm/i915/i915_params.h | 1 + + 6 files changed, 52 insertions(+), 3 deletions(-) + +diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c +index dedbdb175f8b..e7e95308f6e6 100644 +--- a/drivers/gpu/drm/i915/display/intel_display.c ++++ b/drivers/gpu/drm/i915/display/intel_display.c +@@ -8646,9 +8646,11 @@ int intel_modeset_init_noirq(struct drm_i915_private *i915) + + intel_bios_init(i915); + +- ret = intel_vga_register(i915); +- if (ret) +- goto cleanup_bios; ++ if (!i915_modparams.enable_hd_vgaarb || !HAS_PCH_SPLIT(i915)) { ++ ret = intel_vga_register(i915); ++ if (ret) ++ goto cleanup_bios; ++ } + + /* FIXME: completely on the wrong abstraction layer */ + intel_power_domains_init_hw(i915, false); +@@ -8796,6 +8798,12 @@ int intel_modeset_init(struct drm_i915_private *i915) + if (ret) + return ret; + ++ /* ++ * Must do this after fbcon init so that ++ * vgacon_save_screen() works during the handover. ++ */ ++ intel_vga_disable_mem(i915); ++ + /* Only enable hotplug handling once the fbdev is fully set up. */ + intel_hpd_init(i915); + intel_hpd_poll_disable(i915); +@@ -8966,6 +8974,7 @@ void intel_modeset_driver_remove(struct drm_i915_private *i915) + if (!HAS_DISPLAY(i915)) + return; + ++ intel_vga_enable_mem(i915); + flush_workqueue(i915->display.wq.flip); + flush_workqueue(i915->display.wq.modeset); + +diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h +index 714030136b7f..fbd500249ab1 100644 +--- a/drivers/gpu/drm/i915/display/intel_display.h ++++ b/drivers/gpu/drm/i915/display/intel_display.h +@@ -535,6 +535,7 @@ void i830_disable_pipe(struct drm_i915_private *dev_priv, enum pipe pipe); + int vlv_get_hpll_vco(struct drm_i915_private *dev_priv); + int vlv_get_cck_clock(struct drm_i915_private *dev_priv, + const char *name, u32 reg, int ref_freq); ++extern void intel_vga_disable_mem(struct drm_i915_private *dev_priv); + int vlv_get_cck_clock_hpll(struct drm_i915_private *dev_priv, + const char *name, u32 reg); + void intel_init_display_hooks(struct drm_i915_private *dev_priv); +diff --git a/drivers/gpu/drm/i915/display/intel_vga.c b/drivers/gpu/drm/i915/display/intel_vga.c +index a69bfcac9a94..4cafe1f812f5 100644 +--- a/drivers/gpu/drm/i915/display/intel_vga.c ++++ b/drivers/gpu/drm/i915/display/intel_vga.c +@@ -46,6 +46,36 @@ void intel_vga_disable(struct drm_i915_private *dev_priv) + intel_de_posting_read(dev_priv, vga_reg); + } + ++void intel_vga_enable_mem(struct drm_i915_private *dev_priv) ++{ ++ struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); ++ ++ /* Enable VGA memory on Intel HD */ ++ if (i915_modparams.enable_hd_vgaarb && HAS_PCH_SPLIT(dev_priv)) { ++ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); ++ outb(inb(VGA_MIS_R) | (1 << 1), VGA_MIS_W); ++ vga_set_legacy_decoding(pdev, VGA_RSRC_LEGACY_IO | ++ VGA_RSRC_LEGACY_MEM | ++ VGA_RSRC_NORMAL_IO | ++ VGA_RSRC_NORMAL_MEM); ++ vga_put(pdev, VGA_RSRC_LEGACY_IO); ++ } ++} ++ ++void intel_vga_disable_mem(struct drm_i915_private *dev_priv) ++{ ++ struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); ++ /* Disable VGA memory on Intel HD */ ++ if (i915_modparams.enable_hd_vgaarb && HAS_PCH_SPLIT(dev_priv)) { ++ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO); ++ outb(inb(VGA_MIS_R) & ~(1 << 1), VGA_MIS_W); ++ vga_set_legacy_decoding(pdev, VGA_RSRC_LEGACY_IO | ++ VGA_RSRC_NORMAL_IO | ++ VGA_RSRC_NORMAL_MEM); ++ vga_put(pdev, VGA_RSRC_LEGACY_IO); ++ } ++} ++ + void intel_vga_redisable_power_on(struct drm_i915_private *dev_priv) + { + i915_reg_t vga_reg = intel_vga_cntrl_reg(dev_priv); +@@ -54,6 +84,7 @@ void intel_vga_redisable_power_on(struct drm_i915_private *dev_priv) + drm_dbg_kms(&dev_priv->drm, + "Something enabled VGA plane, disabling it\n"); + intel_vga_disable(dev_priv); ++ intel_vga_disable_mem(dev_priv); + } + } + +diff --git a/drivers/gpu/drm/i915/display/intel_vga.h b/drivers/gpu/drm/i915/display/intel_vga.h +index ba5b55b917f0..7e2af7924e99 100644 +--- a/drivers/gpu/drm/i915/display/intel_vga.h ++++ b/drivers/gpu/drm/i915/display/intel_vga.h +@@ -15,4 +15,8 @@ void intel_vga_redisable_power_on(struct drm_i915_private *i915); + int intel_vga_register(struct drm_i915_private *i915); + void intel_vga_unregister(struct drm_i915_private *i915); + ++/* i915 vga arb patch */ ++void intel_vga_enable_mem(struct drm_i915_private *i915); ++void intel_vga_disable_mem(struct drm_i915_private *i915); ++ + #endif /* __INTEL_VGA_H__ */ +diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c +index d1e4d528cb17..a00cbc6591b0 100644 +--- a/drivers/gpu/drm/i915/i915_params.c ++++ b/drivers/gpu/drm/i915/i915_params.c +@@ -154,6 +154,9 @@ i915_param_named_unsafe(invert_brightness, int, 0400, + i915_param_named(disable_display, bool, 0400, + "Disable display (default: false)"); + ++i915_param_named(enable_hd_vgaarb, bool, 0444, ++ "Enable support for VGA arbitration on Intel HD IGD. (default: false)"); ++ + i915_param_named(memtest, bool, 0400, + "Perform a read/write test of all device memory on module load (default: off)"); + +diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h +index 2733cb6cfe09..f21c5b1529cc 100644 +--- a/drivers/gpu/drm/i915/i915_params.h ++++ b/drivers/gpu/drm/i915/i915_params.h +@@ -76,6 +76,7 @@ struct drm_printer; + param(unsigned int, lmem_size, 0, 0400) \ + param(unsigned int, lmem_bar_size, 0, 0400) \ + /* leave bools at the end to not create holes */ \ ++ param(bool, enable_hd_vgaarb, false, 0600) \ + param(bool, enable_hangcheck, true, 0600) \ + param(bool, load_detect_test, false, 0600) \ + param(bool, force_reset_modeset_test, false, 0600) \ +-- +2.39.2 + |