On Wed, Jun 27, 2018 at 04:14:01PM -0700, José Roberto de Souza wrote:
> This registers offsets is not sequential for transcoder D and EDP so
> for EDP transcoder it was writing to 0x420d0 that do not map to
> any register in spec.
>
> CHICKEN_TRANS is used in PSR2 and intel_enable_ddi_hdmi() to apply
> WA #1143 but I'm not aware of any open issue cause by this offset
> error.
>
> Spec: 7524
>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
> Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_reg.h | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c30cfcd90754..098a4cb71310 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7256,9 +7256,17 @@ enum {
> #define BDW_DPRS_MASK_VBLANK_SRD (1 << 0)
> #define CHICKEN_PIPESL_1(pipe) _MMIO_PIPE(pipe, _CHICKEN_PIPESL_1_A, _CHICKEN_PIPESL_1_B)
>
> -#define CHICKEN_TRANS_A 0x420c0
> -#define CHICKEN_TRANS_B 0x420c4
> -#define CHICKEN_TRANS(trans) _MMIO_TRANS(trans, CHICKEN_TRANS_A, CHICKEN_TRANS_B)
> +#define _CHICKEN_TRANS_A 0x420c0
> +#define _CHICKEN_TRANS_B 0x420c4
> +#define _CHICKEN_TRANS_C 0x420c8
> +#define _CHICKEN_TRANS_D 0x420d8
note that enum transcoder has no TRANSCODER_D...
TRANSCODER_EDP = 3
so:
>>> hex(0x420c0+3*4)
'0x420cc'
> +#define _CHICKEN_TRANS_EDP 0x420cc
> +#define CHICKEN_TRANS(trans) _MMIO(_PICK(trans, \
> + _CHICKEN_TRANS_A, \
> + _CHICKEN_TRANS_B, \
> + _CHICKEN_TRANS_C, \
> + _CHICKEN_TRANS_D, \
> + _CHICKEN_TRANS_EDP))
> #define VSC_DATA_SEL_SOFTWARE_CONTROL (1 << 25) /* GLK and CNL+ */
> #define DDI_TRAINING_OVERRIDE_ENABLE (1 << 19)
> #define DDI_TRAINING_OVERRIDE_VALUE (1 << 18)
> --
> 2.18.0
>
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