[PATCH 1/2] Revert "drm/amdgpu: disable runpm if we are the primary adapter"

[PATCH 1/2] Revert "drm/amdgpu: disable runpm if we are the primary adapter"

[Alex Deucher]

This reverts commit b95dc06af3e683d6b7ddbbae178b2b2a21ee8b2b.

This workaround is no longer necessary.  We have a better workaround
in commit f95af4a9236695 ("drm/amdgpu: don't runtime suspend if there are displays attached (v3)").

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h     |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 28 -------------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c |  6 ------
 3 files changed, 35 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index d557f4db2565..682ec660f2c4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -981,7 +981,6 @@ struct amdgpu_device {
 	bool                            runpm;
 	bool                            in_runpm;
 	bool                            has_pr3;
-	bool                            is_fw_fb;
 
 	bool                            pm_sysfs_en;
 	bool                            ucode_sysfs_en;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index ebd37fb19cdb..3c198b2a86db 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -38,7 +38,6 @@
 #include <linux/mmu_notifier.h>
 #include <linux/suspend.h>
 #include <linux/cc_platform.h>
-#include <linux/fb.h>
 
 #include "amdgpu.h"
 #include "amdgpu_irq.h"
@@ -1950,26 +1949,6 @@ MODULE_DEVICE_TABLE(pci, pciidlist);
 
 static const struct drm_driver amdgpu_kms_driver;
 
-static bool amdgpu_is_fw_framebuffer(resource_size_t base,
-				     resource_size_t size)
-{
-	bool found = false;
-#if IS_REACHABLE(CONFIG_FB)
-	struct apertures_struct *a;
-
-	a = alloc_apertures(1);
-	if (!a)
-		return false;
-
-	a->ranges[0].base = base;
-	a->ranges[0].size = size;
-
-	found = is_firmware_framebuffer(a);
-	kfree(a);
-#endif
-	return found;
-}
-
 static void amdgpu_get_secondary_funcs(struct amdgpu_device *adev)
 {
 	struct pci_dev *p = NULL;
@@ -2000,8 +1979,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	unsigned long flags = ent->driver_data;
 	int ret, retry = 0, i;
 	bool supports_atomic = false;
-	bool is_fw_fb;
-	resource_size_t base, size;
 
 	/* skip devices which are owned by radeon */
 	for (i = 0; i < ARRAY_SIZE(amdgpu_unsupported_pciidlist); i++) {
@@ -2068,10 +2045,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	}
 #endif
 
-	base = pci_resource_start(pdev, 0);
-	size = pci_resource_len(pdev, 0);
-	is_fw_fb = amdgpu_is_fw_framebuffer(base, size);
-
 	/* Get rid of things like offb */
 	ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &amdgpu_kms_driver);
 	if (ret)
@@ -2084,7 +2057,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 	adev->dev  = &pdev->dev;
 	adev->pdev = pdev;
 	ddev = adev_to_drm(adev);
-	adev->is_fw_fb = is_fw_fb;
 
 	if (!supports_atomic)
 		ddev->driver_features &= ~DRIVER_ATOMIC;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 51bb977154eb..497478f8a5d3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -185,12 +185,6 @@ int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
 			adev->runpm = true;
 			break;
 		}
-		/* XXX: disable runtime pm if we are the primary adapter
-		 * to avoid displays being re-enabled after DPMS.
-		 * This needs to be sorted out and fixed properly.
-		 */
-		if (adev->is_fw_fb)
-			adev->runpm = false;
 
 		amdgpu_runtime_pm_quirk(adev);
 
-- 
2.35.1

[PATCH 2/2] Revert "fbdev: fbmem: add a helper to determine if an aperture is used by a fw fb"

[Alex Deucher]

This reverts commit 9a45ac2320d0a6ae01880a30d4b86025fce4061b.

This was added a helper for amdgpu to workaround a runtime pm regression
caused by a runtime pm fix in efifb.  We now have a better workarouund
in amdgpu in
commit f95af4a9236695 ("drm/amdgpu: don't runtime suspend if there are displays attached (v3)")
so this workaround is no longer necessary.  Since amdgpu was the only
user of this interface, we can remove it.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 --------------------------------
 include/linux/fb.h               |  1 -
 2 files changed, 48 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ad9aac06427a..700ac4a83329 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1783,53 +1783,6 @@ int remove_conflicting_framebuffers(struct apertures_struct *a,
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
-/**
- * is_firmware_framebuffer - detect if firmware-configured framebuffer matches
- * @a: memory range, users of which are to be checked
- *
- * This function checks framebuffer devices (initialized by firmware/bootloader)
- * which use memory range described by @a. If @a matchesm the function returns
- * true, otherwise false.
- */
-bool is_firmware_framebuffer(struct apertures_struct *a)
-{
-	bool do_free = false;
-	bool found = false;
-	int i;
-
-	if (!a) {
-		a = alloc_apertures(1);
-		if (!a)
-			return false;
-
-		a->ranges[0].base = 0;
-		a->ranges[0].size = ~0;
-		do_free = true;
-	}
-
-	mutex_lock(&registration_lock);
-	/* check all firmware fbs and kick off if the base addr overlaps */
-	for_each_registered_fb(i) {
-		struct apertures_struct *gen_aper;
-
-		if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
-			continue;
-
-		gen_aper = registered_fb[i]->apertures;
-		if (fb_do_apertures_overlap(gen_aper, a)) {
-			found = true;
-			break;
-		}
-	}
-	mutex_unlock(&registration_lock);
-
-	if (do_free)
-		kfree(a);
-
-	return found;
-}
-EXPORT_SYMBOL(is_firmware_framebuffer);
-
 /**
  * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices
  * @pdev: PCI device
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 9a77ab615c36..147d582dab41 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -612,7 +612,6 @@ extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
 					       const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
 					   const char *name, bool primary);
-extern bool is_firmware_framebuffer(struct apertures_struct *a);
 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
-- 
2.35.1

Re: [PATCH 2/2] Revert "fbdev: fbmem: add a helper to determine if an aperture is used by a fw fb"

[Javier Martinez Canillas]

On 5/4/22 15:48, Alex Deucher wrote:
> This reverts commit 9a45ac2320d0a6ae01880a30d4b86025fce4061b.
> 
> This was added a helper for amdgpu to workaround a runtime pm regression
> caused by a runtime pm fix in efifb.  We now have a better workarouund

s/workarouund/workaround

> in amdgpu in
> commit f95af4a9236695 ("drm/amdgpu: don't runtime suspend if there are displays attached (v3)")

Again I would write it as:

commit f95af4a9236695 ("drm/amdgpu: don't runtime suspend if there are
displays attached (v3)")

> so this workaround is no longer necessary.  Since amdgpu was the only
> user of this interface, we can remove it.
> 
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> ---

Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>

-- 
Best regards,

Javier Martinez Canillas
Linux Engineering
Red Hat

[PATCH 2/2] Revert "fbdev: fbmem: add a helper to determine if an aperture is used by a fw fb"

[Alex Deucher]

This reverts commit 9a45ac2320d0a6ae01880a30d4b86025fce4061b.

This was added a helper for amdgpu to workaround a runtime pm regression
caused by a runtime pm fix in efifb.  We now have a better workarouund
in amdgpu in
commit f95af4a9236695 ("drm/amdgpu: don't runtime suspend if there are displays attached (v3)")
so this workaround is no longer necessary.  Since amdgpu was the only
user of this interface, we can remove it.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/video/fbdev/core/fbmem.c | 47 --------------------------------
 include/linux/fb.h               |  1 -
 2 files changed, 48 deletions(-)

diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index ad9aac06427a..700ac4a83329 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1783,53 +1783,6 @@ int remove_conflicting_framebuffers(struct apertures_struct *a,
 }
 EXPORT_SYMBOL(remove_conflicting_framebuffers);
 
-/**
- * is_firmware_framebuffer - detect if firmware-configured framebuffer matches
- * @a: memory range, users of which are to be checked
- *
- * This function checks framebuffer devices (initialized by firmware/bootloader)
- * which use memory range described by @a. If @a matchesm the function returns
- * true, otherwise false.
- */
-bool is_firmware_framebuffer(struct apertures_struct *a)
-{
-	bool do_free = false;
-	bool found = false;
-	int i;
-
-	if (!a) {
-		a = alloc_apertures(1);
-		if (!a)
-			return false;
-
-		a->ranges[0].base = 0;
-		a->ranges[0].size = ~0;
-		do_free = true;
-	}
-
-	mutex_lock(&registration_lock);
-	/* check all firmware fbs and kick off if the base addr overlaps */
-	for_each_registered_fb(i) {
-		struct apertures_struct *gen_aper;
-
-		if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
-			continue;
-
-		gen_aper = registered_fb[i]->apertures;
-		if (fb_do_apertures_overlap(gen_aper, a)) {
-			found = true;
-			break;
-		}
-	}
-	mutex_unlock(&registration_lock);
-
-	if (do_free)
-		kfree(a);
-
-	return found;
-}
-EXPORT_SYMBOL(is_firmware_framebuffer);
-
 /**
  * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices
  * @pdev: PCI device
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 9a77ab615c36..147d582dab41 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -612,7 +612,6 @@ extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
 					       const char *name);
 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
 					   const char *name, bool primary);
-extern bool is_firmware_framebuffer(struct apertures_struct *a);
 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
-- 
2.35.1