[PATCH] drm/radeon: disable MSI on RV515

[Alex Deucher]

On Fri, Apr 13, 2012 at 10:19 AM, Dave Airlie <airlied at gmail.com> wrote:
> From: Dave Airlie <airlied at redhat.com>
>
> My rv515 card is very flaky with msi enabled. Every so often it loses a rearm
> and never comes back, manually banging the rearm brings it back.
>
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Reviewed-by: Alex Deucher <alexander.deucher at amd.com>

> ---
>  drivers/gpu/drm/radeon/radeon_irq_kms.c |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> index 66d5fe1..65060b7 100644
> --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> @@ -147,6 +147,12 @@ static bool radeon_msi_ok(struct radeon_device *rdev)
>            (rdev->pdev->subsystem_device == 0x01fd))
>                return true;
>
> +       /* RV515 seems to have MSI issues where it loses
> +        * MSI rearms occasionally. This leads to lockups and freezes.
> +        * disable it by default.
> +        */
> +       if (rdev->family == CHIP_RV515)
> +               return false;
>        if (rdev->flags & RADEON_IS_IGP) {
>                /* APUs work fine with MSIs */
>                if (rdev->family >= CHIP_PALM)
> --
> 1.7.7.6
>
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