On Thu, 2021-04-22 at 12:54 +0300, Gwan-gyeong Mun wrote:
> TGL PSR2 hardware tracking shows momentary flicker and screen shift if
> TGL Display stepping is B1 from A0.
> It has been fixed from TGL Display stepping C0.
>
> HSDES: 18015970021
> HSDES: 2209313811
> BSpec: 55378
>
> Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_psr.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 4ad756e238c5..2cc9eeab4baf 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -739,6 +739,12 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
> return false;
> }
>
>
>
>
>
>
>
>
> + /* Wa_2209313811 */
> + if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B1)) {
Missing to check if manual tracking is being used, in this case we can enable PSR2 in those display steppings.
> + drm_dbg_kms(&dev_priv->drm, "PSR2 is not supported this Display stepping\n");
> + return false;
> + }
> +
> /* Wa_16011181250 */
> if (IS_ROCKETLAKE(dev_priv) || IS_ALDERLAKE_S(dev_priv)) {
> drm_dbg_kms(&dev_priv->drm, "PSR2 is defeatured for this platform\n");
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