On Tue, Oct 25, 2011 at 10:40 PM, Ilija Hadzic
<ihadzic@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> radeon_driver_irq_preinstall_kms and radeon_driver_irq_uninstall_kms
> hard code the loop to 6 which happens to be the current maximum
> number of crtcs; if one day an ASIC with more crtcs comes out, this
> is a trouble waiting to happen. it's better to use num_crtc instead
> (for ASICs that have fewer than 6 CRTCs, this is still OK because
> higher numbers won't be looked at)
>
This is actually not quite right. The number of HPD (Hot Plug Detect)
pins is not equal to the number of crtcs. Radeons have supported 6
HPD pins long before we supported 6 crtcs (e.g., cards with more
connectors than crtcs). The logic should probably look like:
#define RADEON_MAX_HPD_PINS 6
for (i = 0; i < rdev->num_crtc; i++) {
rdev->irq.crtc_vblank_int[i] = false;
rdev->irq.pflip[i] = false;
}
for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
rdev->irq.hpd[i] = false;
Alex
> Signed-off-by: Ilija Hadzic <ihadzic@xxxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/radeon/radeon_irq_kms.c | 4 ++--
> 1 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> index 9ec830c..a0f9d24 100644
> --- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
> @@ -69,7 +69,7 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
> rdev->irq.gui_idle = false;
> for (i = 0; i < rdev->num_crtc; i++)
> rdev->irq.crtc_vblank_int[i] = false;
> - for (i = 0; i < 6; i++) {
> + for (i = 0; i < rdev->num_crtc; i++) {
> rdev->irq.hpd[i] = false;
> rdev->irq.pflip[i] = false;
> }
> @@ -101,7 +101,7 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
> rdev->irq.gui_idle = false;
> for (i = 0; i < rdev->num_crtc; i++)
> rdev->irq.crtc_vblank_int[i] = false;
> - for (i = 0; i < 6; i++) {
> + for (i = 0; i < rdev->num_crtc; i++) {
> rdev->irq.hpd[i] = false;
> rdev->irq.pflip[i] = false;
> }
> --
> 1.7.7
>
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