On Thu, 2021-04-22 at 19:05 +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
>
> v2: Add checking of PSR2 manual tracking (Jose)
>
Reviewed-by: José Roberto de Souza <jose.souza@xxxxxxxxx>
> 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 | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> index 4ad756e238c5..17cbdd7805a2 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -817,6 +817,13 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
> }
> }
>
>
>
>
> + /* Wa_2209313811 */
> + if (!crtc_state->enable_psr2_sel_fetch &&
> + IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_B1)) {
> + drm_dbg_kms(&dev_priv->drm, "PSR2 HW tracking is not supported this Display stepping\n");
> + return false;
> + }
> +
> if (!crtc_state->enable_psr2_sel_fetch &&
> (crtc_hdisplay > psr_max_h || crtc_vdisplay > psr_max_v)) {
> drm_dbg_kms(&dev_priv->drm,
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