From: Seth Forshee <seth.forshee@canonical.com>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: David Airlie <airlied@linux.ie>, Matthew Garrett <mjg@redhat.com>,
Daniel Vetter <daniel.vetter@ffwll.ch>,
Andreas Heider <andreas@meetr.de>,
Seth Forshee <seth.forshee@canonical.com>
Subject: [PATCH 2/7] vga_switcheroo: Add helper function to get the active client
Date: Fri, 7 Sep 2012 10:22:05 -0500 [thread overview]
Message-ID: <1347031330-19657-3-git-send-email-seth.forshee@canonical.com> (raw)
In-Reply-To: <1347031330-19657-1-git-send-email-seth.forshee@canonical.com>
Add vga_switcheroo_get_active_client() to allow drivers to get the
active video client. This will be used by drivers wishing to temporarily
mux only the DDC to the inactive client.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
---
drivers/gpu/vga/vga_switcheroo.c | 14 ++++++++++++++
include/linux/vga_switcheroo.h | 2 ++
2 files changed, 16 insertions(+)
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index ea6bcc2..e53f67d 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -205,6 +205,20 @@ find_active_client(struct list_head *head)
return NULL;
}
+struct pci_dev *vga_switcheroo_get_active_client(void)
+{
+ struct vga_switcheroo_client *client;
+ struct pci_dev *pdev = NULL;
+
+ mutex_lock(&vgasr_mutex);
+ client = find_active_client(&vgasr_priv.clients);
+ if (client)
+ pdev = client->pdev;
+ mutex_unlock(&vgasr_mutex);
+ return pdev;
+}
+EXPORT_SYMBOL(vga_switcheroo_get_active_client);
+
int vga_switcheroo_get_client_state(struct pci_dev *pdev)
{
struct vga_switcheroo_client *client;
diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
index b0d0839..e361858 100644
--- a/include/linux/vga_switcheroo.h
+++ b/include/linux/vga_switcheroo.h
@@ -61,6 +61,7 @@ void vga_switcheroo_unregister_handler(void);
int vga_switcheroo_process_delayed_switch(void);
+struct pci_dev *vga_switcheroo_get_active_client(void);
int vga_switcheroo_get_client_state(struct pci_dev *dev);
#else
@@ -76,6 +77,7 @@ static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
int id, bool active) { return 0; }
static inline void vga_switcheroo_unregister_handler(void) {}
static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
+static inline struct pci_dev *vga_switcheroo_get_active_client(void) { return NULL; }
static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
--
1.7.9.5
next prev parent reply other threads:[~2012-09-07 15:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-07 15:22 [PATCH 0/7] Fixes for hybrid graphics Apple machines Seth Forshee
2012-09-07 15:22 ` [PATCH 1/7] vga_switcheroo: Add support for switching only the DDC Seth Forshee
2012-09-07 15:22 ` Seth Forshee [this message]
2012-09-07 15:22 ` [PATCH 3/7] vga_switcheroo: Add notifier call chain for switcheroo events Seth Forshee
2012-09-07 15:22 ` [PATCH 4/7] apple-gmux: Add switch_ddc support Seth Forshee
2012-09-07 15:22 ` [PATCH 5/7] drm/edid: Switch DDC when reading the EDID Seth Forshee
2012-09-07 15:22 ` [PATCH 6/7] drm/pci: Add drm_put_pci_dev() Seth Forshee
2012-09-07 15:22 ` [PATCH 7/7] drm/pci: Defer initialization of secondary graphics devices until switcheroo is ready Seth Forshee
2012-09-07 21:35 ` [PATCH 0/7] Fixes for hybrid graphics Apple machines Dave Airlie
2012-09-08 5:07 ` Seth Forshee
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