[Intel-gfx] [PATCH] drm/i915/display: abstract all vgaarb access to intel_vga.[ch]
Jani Nikula
jani.nikula at intel.com
Tue Oct 1 15:25:06 UTC 2019
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 at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
---
drivers/gpu/drm/i915/Makefile | 3 +-
drivers/gpu/drm/i915/display/intel_display.c | 97 +----------
drivers/gpu/drm/i915/display/intel_display.h | 3 -
.../drm/i915/display/intel_display_power.c | 24 +--
drivers/gpu/drm/i915/display/intel_vga.c | 160 ++++++++++++++++++
drivers/gpu/drm/i915/display/intel_vga.h | 18 ++
drivers/gpu/drm/i915/i915_drv.c | 30 +---
drivers/gpu/drm/i915/i915_pci.c | 1 -
drivers/gpu/drm/i915/i915_suspend.c | 3 +-
drivers/gpu/drm/i915/intel_runtime_pm.c | 1 -
10 files changed, 194 insertions(+), 146 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_vga.c
create mode 100644 drivers/gpu/drm/i915/display/intel_vga.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index e04463d85401..d2b53b5add81 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -184,7 +184,8 @@ i915-y += \
display/intel_psr.o \
display/intel_quirks.o \
display/intel_sprite.o \
- display/intel_tc.o
+ display/intel_tc.o \
+ display/intel_vga.o
i915-$(CONFIG_ACPI) += \
display/intel_acpi.o \
display/intel_opregion.o
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index f1328c08f4ad..d99c59e97568 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -31,7 +31,6 @@
#include <linux/module.h>
#include <linux/dma-resv.h>
#include <linux/slab.h>
-#include <linux/vgaarb.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
@@ -79,6 +78,7 @@
#include "intel_sideband.h"
#include "intel_sprite.h"
#include "intel_tc.h"
+#include "intel_vga.h"
/* Primary plane formats for gen <= 3 */
static const u32 i8xx_primary_formats[] = {
@@ -4241,7 +4241,7 @@ __intel_display_resume(struct drm_device *dev,
int i, ret;
intel_modeset_setup_hw_state(dev, ctx);
- i915_redisable_vga(to_i915(dev));
+ intel_vga_redisable(to_i915(dev));
if (!state)
return 0;
@@ -15994,35 +15994,6 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
}
-static i915_reg_t i915_vgacntrl_reg(struct drm_i915_private *dev_priv)
-{
- if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
- return VLV_VGACNTRL;
- else if (INTEL_GEN(dev_priv) >= 5)
- return CPU_VGACNTRL;
- else
- return VGACNTRL;
-}
-
-/* Disable the VGA plane that we never use */
-static void i915_disable_vga(struct drm_i915_private *dev_priv)
-{
- struct pci_dev *pdev = dev_priv->drm.pdev;
- u8 sr1;
- i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
-
- /* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */
- vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
- outb(SR01, VGA_SR_INDEX);
- sr1 = inb(VGA_SR_DATA);
- outb(sr1 | 1<<5, VGA_SR_DATA);
- vga_put(pdev, VGA_RSRC_LEGACY_IO);
- udelay(300);
-
- I915_WRITE(vga_reg, VGA_DISP_DISABLE);
- POSTING_READ(vga_reg);
-}
-
void intel_modeset_init_hw(struct drm_i915_private *i915)
{
intel_update_cdclk(i915);
@@ -16288,7 +16259,7 @@ int intel_modeset_init(struct drm_i915_private *i915)
intel_update_max_cdclk(i915);
/* Just disable it once at startup */
- i915_disable_vga(i915);
+ intel_vga_disable(i915);
intel_setup_outputs(i915);
drm_modeset_lock_all(dev);
@@ -16647,39 +16618,6 @@ static void intel_sanitize_encoder(struct intel_encoder *encoder)
icl_sanitize_encoder_pll_mapping(encoder);
}
-void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv)
-{
- i915_reg_t vga_reg = i915_vgacntrl_reg(dev_priv);
-
- if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
- DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
- i915_disable_vga(dev_priv);
- }
-}
-
-void i915_redisable_vga(struct drm_i915_private *dev_priv)
-{
- intel_wakeref_t wakeref;
-
- /*
- * This function can be called both from intel_modeset_setup_hw_state or
- * at a very early point in our resume sequence, where the power well
- * structures are not yet restored. Since this function is at a very
- * paranoid "someone might have enabled VGA while we were not looking"
- * level, just check if the power well is enabled instead of trying to
- * follow the "don't touch the power well if we don't need it" policy
- * the rest of the driver uses.
- */
- wakeref = intel_display_power_get_if_enabled(dev_priv,
- POWER_DOMAIN_VGA);
- if (!wakeref)
- return;
-
- i915_redisable_vga_power_on(dev_priv);
-
- intel_display_power_put(dev_priv, POWER_DOMAIN_VGA, wakeref);
-}
-
/* FIXME read out full plane state for all planes */
static void readout_plane_state(struct drm_i915_private *dev_priv)
{
@@ -17188,35 +17126,6 @@ void intel_modeset_driver_remove(struct drm_i915_private *i915)
intel_fbc_cleanup_cfb(i915);
}
-/*
- * set vga decode state - true == enable VGA decode
- */
-int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv, bool state)
-{
- unsigned reg = INTEL_GEN(dev_priv) >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
- u16 gmch_ctrl;
-
- if (pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl)) {
- DRM_ERROR("failed to read control word\n");
- return -EIO;
- }
-
- if (!!(gmch_ctrl & INTEL_GMCH_VGA_DISABLE) == !state)
- return 0;
-
- if (state)
- gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
- else
- gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
-
- if (pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl)) {
- DRM_ERROR("failed to write control word\n");
- return -EIO;
- }
-
- return 0;
-}
-
#if IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR)
struct intel_display_error_state {
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 4b9e18e5a263..2782f23ee887 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -579,10 +579,7 @@ void intel_display_print_error_state(struct drm_i915_error_state_buf *e,
void intel_modeset_init_hw(struct drm_i915_private *i915);
int intel_modeset_init(struct drm_i915_private *i915);
void intel_modeset_driver_remove(struct drm_i915_private *i915);
-int intel_modeset_vga_set_state(struct drm_i915_private *dev_priv, bool state);
void intel_display_resume(struct drm_device *dev);
-void i915_redisable_vga(struct drm_i915_private *dev_priv);
-void i915_redisable_vga_power_on(struct drm_i915_private *dev_priv);
void intel_init_pch_refclk(struct drm_i915_private *dev_priv);
/* modesetting asserts */
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index f1186bc23542..bb642a1a0dd4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -3,8 +3,6 @@
* Copyright © 2019 Intel Corporation
*/
-#include <linux/vgaarb.h>
-
#include "display/intel_crt.h"
#include "display/intel_dp.h"
@@ -19,6 +17,7 @@
#include "intel_hotplug.h"
#include "intel_sideband.h"
#include "intel_tc.h"
+#include "intel_vga.h"
bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
enum i915_power_well_id power_well_id);
@@ -267,23 +266,8 @@ bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
static void hsw_power_well_post_enable(struct drm_i915_private *dev_priv,
u8 irq_pipe_mask, bool has_vga)
{
- struct pci_dev *pdev = dev_priv->drm.pdev;
-
- /*
- * After we re-enable the power well, if we touch VGA register 0x3d5
- * we'll get unclaimed register interrupts. This stops after we write
- * anything to the VGA MSR register. The vgacon module uses this
- * register all the time, so if we unbind our driver and, as a
- * consequence, bind vgacon, we'll get stuck in an infinite loop at
- * console_unlock(). So make here we touch the VGA MSR register, making
- * sure vgacon can keep working normally without triggering interrupts
- * and error messages.
- */
- if (has_vga) {
- vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
- outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
- vga_put(pdev, VGA_RSRC_LEGACY_IO);
- }
+ if (has_vga)
+ intel_vga_msr_write(dev_priv);
if (irq_pipe_mask)
gen8_irq_power_well_post_enable(dev_priv, irq_pipe_mask);
@@ -1205,7 +1189,7 @@ static void vlv_display_power_well_init(struct drm_i915_private *dev_priv)
intel_crt_reset(&encoder->base);
}
- i915_redisable_vga_power_on(dev_priv);
+ intel_vga_redisable_power_on(dev_priv);
intel_pps_unlock_regs_wa(dev_priv);
}
diff --git a/drivers/gpu/drm/i915/display/intel_vga.c b/drivers/gpu/drm/i915/display/intel_vga.c
new file mode 100644
index 000000000000..732568eaa988
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_vga.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include <linux/pci.h>
+#include <linux/vgaarb.h>
+
+#include <drm/i915_drm.h>
+
+#include "i915_drv.h"
+#include "intel_vga.h"
+
+static i915_reg_t intel_vga_cntrl_reg(struct drm_i915_private *i915)
+{
+ if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
+ return VLV_VGACNTRL;
+ else if (INTEL_GEN(i915) >= 5)
+ return CPU_VGACNTRL;
+ else
+ return VGACNTRL;
+}
+
+/* Disable the VGA plane that we never use */
+void intel_vga_disable(struct drm_i915_private *dev_priv)
+{
+ struct pci_dev *pdev = dev_priv->drm.pdev;
+ i915_reg_t vga_reg = intel_vga_cntrl_reg(dev_priv);
+ u8 sr1;
+
+ /* WaEnableVGAAccessThroughIOPort:ctg,elk,ilk,snb,ivb,vlv,hsw */
+ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
+ outb(SR01, VGA_SR_INDEX);
+ sr1 = inb(VGA_SR_DATA);
+ outb(sr1 | 1 << 5, VGA_SR_DATA);
+ vga_put(pdev, VGA_RSRC_LEGACY_IO);
+ udelay(300);
+
+ I915_WRITE(vga_reg, VGA_DISP_DISABLE);
+ POSTING_READ(vga_reg);
+}
+
+void intel_vga_redisable_power_on(struct drm_i915_private *dev_priv)
+{
+ i915_reg_t vga_reg = intel_vga_cntrl_reg(dev_priv);
+
+ if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
+ DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
+ intel_vga_disable(dev_priv);
+ }
+}
+
+void intel_vga_redisable(struct drm_i915_private *i915)
+{
+ intel_wakeref_t wakeref;
+
+ /*
+ * This function can be called both from intel_modeset_setup_hw_state or
+ * at a very early point in our resume sequence, where the power well
+ * structures are not yet restored. Since this function is at a very
+ * paranoid "someone might have enabled VGA while we were not looking"
+ * level, just check if the power well is enabled instead of trying to
+ * follow the "don't touch the power well if we don't need it" policy
+ * the rest of the driver uses.
+ */
+ wakeref = intel_display_power_get_if_enabled(i915, POWER_DOMAIN_VGA);
+ if (!wakeref)
+ return;
+
+ intel_vga_redisable_power_on(i915);
+
+ intel_display_power_put(i915, POWER_DOMAIN_VGA, wakeref);
+}
+
+void intel_vga_msr_write(struct drm_i915_private *i915)
+{
+ struct pci_dev *pdev = i915->drm.pdev;
+
+ /*
+ * After we re-enable the power well, if we touch VGA register 0x3d5
+ * we'll get unclaimed register interrupts. This stops after we write
+ * anything to the VGA MSR register. The vgacon module uses this
+ * register all the time, so if we unbind our driver and, as a
+ * consequence, bind vgacon, we'll get stuck in an infinite loop at
+ * console_unlock(). So make here we touch the VGA MSR register, making
+ * sure vgacon can keep working normally without triggering interrupts
+ * and error messages.
+ */
+ vga_get_uninterruptible(pdev, VGA_RSRC_LEGACY_IO);
+ outb(inb(VGA_MSR_READ), VGA_MSR_WRITE);
+ vga_put(pdev, VGA_RSRC_LEGACY_IO);
+}
+
+static int
+intel_vga_set_state(struct drm_i915_private *i915, bool enable_decode)
+{
+ unsigned int reg = INTEL_GEN(i915) >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL;
+ u16 gmch_ctrl;
+
+ if (pci_read_config_word(i915->bridge_dev, reg, &gmch_ctrl)) {
+ DRM_ERROR("failed to read control word\n");
+ return -EIO;
+ }
+
+ if (!!(gmch_ctrl & INTEL_GMCH_VGA_DISABLE) == !enable_decode)
+ return 0;
+
+ if (enable_decode)
+ gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE;
+ else
+ gmch_ctrl |= INTEL_GMCH_VGA_DISABLE;
+
+ if (pci_write_config_word(i915->bridge_dev, reg, gmch_ctrl)) {
+ DRM_ERROR("failed to write control word\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static unsigned int
+intel_vga_set_decode(void *cookie, bool enable_decode)
+{
+ struct drm_i915_private *i915 = cookie;
+
+ intel_vga_set_state(i915, enable_decode);
+
+ if (enable_decode)
+ 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;
+}
+
+int intel_vga_register(struct drm_i915_private *i915)
+{
+ struct pci_dev *pdev = i915->drm.pdev;
+ int ret;
+
+ /*
+ * 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, intel_vga_set_decode);
+ if (ret && ret != -ENODEV)
+ return ret;
+
+ return 0;
+}
+
+void intel_vga_unregister(struct drm_i915_private *i915)
+{
+ struct pci_dev *pdev = i915->drm.pdev;
+
+ vga_client_register(pdev, NULL, NULL, NULL);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_vga.h b/drivers/gpu/drm/i915/display/intel_vga.h
new file mode 100644
index 000000000000..3517872e62ac
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_vga.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#ifndef __INTEL_VGA_H__
+#define __INTEL_VGA_H__
+
+struct drm_i915_private;
+
+void intel_vga_msr_write(struct drm_i915_private *i915);
+void intel_vga_disable(struct drm_i915_private *i915);
+void intel_vga_redisable(struct drm_i915_private *i915);
+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);
+
+#endif /* __INTEL_VGA_H__ */
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 91aae56b4280..3306c6bb515a 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -36,7 +36,6 @@
#include <linux/pm_runtime.h>
#include <linux/pnp.h>
#include <linux/slab.h>
-#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
#include <linux/vt.h>
#include <acpi/video.h>
@@ -59,6 +58,7 @@
#include "display/intel_overlay.h"
#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;
}
@@ -430,7 +410,7 @@ 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);
}
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index ea53dfe2fba0..1cbf3998b361 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -23,7 +23,6 @@
*/
#include <linux/console.h>
-#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
#include <drm/drm_drv.h>
diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 8508a01ad8b9..2b2086def0f1 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -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)
diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 2fd3c097e1f5..ad719c9602af 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -27,7 +27,6 @@
*/
#include <linux/pm_runtime.h>
-#include <linux/vgaarb.h>
#include <drm/drm_print.h>
--
2.20.1
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