Am 12.05.2017 um 01:31 schrieb Lyude:
> We end up reading the interrupt register for HPD5, and then writing it
> to HPD6 which on systems without anything using HPD5 results in
> permanently disabling hotplug on one of the display outputs after the
> first time we acknowledge a hotplug interrupt from the GPU.
>
> This code is really bad. But for now, let's just fix this. I will
> hopefully have a large patch series to refactor all of this soon.
>
> Signed-off-by: Lyude <lyude at redhat.com>
> Cc: stable at vger.kernel.org
Really nice catch! And yes I agree the copy&pasted code in HPD handling
always scared me as well.
Patch is Reviewed-by: Christian König <christian.koenig at amd.com>.
Christian.
> ---
> drivers/gpu/drm/radeon/cik.c | 4 ++--
> drivers/gpu/drm/radeon/evergreen.c | 4 ++--
> drivers/gpu/drm/radeon/r600.c | 2 +-
> drivers/gpu/drm/radeon/si.c | 4 ++--
> 4 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c
> index 53710dd..cfc917c 100644
> --- a/drivers/gpu/drm/radeon/cik.c
> +++ b/drivers/gpu/drm/radeon/cik.c
> @@ -7401,7 +7401,7 @@ static inline void cik_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.cik.disp_int_cont5 & DC_HPD6_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> @@ -7431,7 +7431,7 @@ static inline void cik_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.cik.disp_int_cont5 & DC_HPD6_RX_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_RX_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
> index d1b1e0c..c48d19e 100644
> --- a/drivers/gpu/drm/radeon/evergreen.c
> +++ b/drivers/gpu/drm/radeon/evergreen.c
> @@ -4933,7 +4933,7 @@ static void evergreen_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> @@ -4964,7 +4964,7 @@ static void evergreen_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_RX_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_RX_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
> index 0a08517..e06e2d8 100644
> --- a/drivers/gpu/drm/radeon/r600.c
> +++ b/drivers/gpu/drm/radeon/r600.c
> @@ -3988,7 +3988,7 @@ static void r600_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.r600.disp_int_cont2 & DC_HPD6_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
> index 528e5a4..bfeb774 100644
> --- a/drivers/gpu/drm/radeon/si.c
> +++ b/drivers/gpu/drm/radeon/si.c
> @@ -6330,7 +6330,7 @@ static inline void si_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
> @@ -6361,7 +6361,7 @@ static inline void si_irq_ack(struct radeon_device *rdev)
> WREG32(DC_HPD5_INT_CONTROL, tmp);
> }
> if (rdev->irq.stat_regs.evergreen.disp_int_cont5 & DC_HPD6_RX_INTERRUPT) {
> - tmp = RREG32(DC_HPD5_INT_CONTROL);
> + tmp = RREG32(DC_HPD6_INT_CONTROL);
> tmp |= DC_HPDx_RX_INT_ACK;
> WREG32(DC_HPD6_INT_CONTROL, tmp);
> }
