On Thu, Jun 28, 2012 at 3:45 AM, Dave Airlie airlied@gmail.com wrote:
On Wed, Jun 27, 2012 at 8:35 AM, Dave Airlie airlied@gmail.com wrote:
From: Dave Airlie airlied@redhat.com
We need these for detecting the max link speed for drm drivers.
Hi Bjorn,
Can you ack this patch so I can carry it in the drm-next tree? we need these regs for getting the PCIE v2/v3 supported link speeds.
Sure. Note that I already have a patch in my "next" tree that will conflict with this because it contains this hunk:
#define PCI_EXP_OBFF_WAKE_EN 0x6000 /* OBFF using WAKE# signaling */ +#define PCI_CAP_EXP_ENDPOINT_SIZEOF_V2 44 /* v2 endpoints end here */ #define PCI_EXP_LNKCTL2 48 /* Link Control 2 */
at this commit: http://git.kernel.org/?p=linux/kernel/git/helgaas/pci.git;a=commitdiff;h=a0d...
I think the comments would make more sense as "2.5GT/s supported", etc., since these bits don't tell you anything about the "Current Link Speed".
Maybe it would make sense for me to incorporate this patch into my "next" branch, and you could carry both commits in your drm-next tree? I don't know what results in the easiest merge later. But if you need it:
Acked-by: Bjorn Helgaas bhelgaas@google.com
Bjorn
Signed-off-by: Dave Airlie airlied@redhat.com
include/linux/pci_regs.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/include/linux/pci_regs.h b/include/linux/pci_regs.h index 4b608f5..7f04132 100644 --- a/include/linux/pci_regs.h +++ b/include/linux/pci_regs.h @@ -521,6 +521,11 @@ #define PCI_EXP_OBFF_MSGA_EN 0x2000 /* OBFF enable with Message type A */ #define PCI_EXP_OBFF_MSGB_EN 0x4000 /* OBFF enable with Message type B */ #define PCI_EXP_OBFF_WAKE_EN 0x6000 /* OBFF using WAKE# signaling */ +#define PCI_EXP_LNKCAP2 44 /* Link Capability 2 */ +#define PCI_EXP_LNKCAP2_SLS_2_5GB 0x01 /* Current Link Speed 2.5GT/s */ +#define PCI_EXP_LNKCAP2_SLS_5_0GB 0x02 /* Current Link Speed 5.0GT/s */ +#define PCI_EXP_LNKCAP2_SLS_8_0GB 0x04 /* Current Link Speed 8.0GT/s */ +#define PCI_EXP_LNKCAP2_CROSSLINK 0x100 /* Crosslink supported */ #define PCI_EXP_LNKCTL2 48 /* Link Control 2 */ #define PCI_EXP_SLTCTL2 56 /* Slot Control 2 */
-- 1.7.7.6
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