On Wed, Oct 15, 2025 at 12:15:23AM -0300, Gustavo Sousa wrote:
> Xe3p_LPD has the same behavior as for Xe3_LPD with respect to DMC
> context data for pipes C and D, which are lost when their power wells
> are disabled. As such, let's extend the condition for Xe3_LPD in
> need_pipedmc_load_mmio() to also catch Xe3p_LPD.
>
> Bspec: 68851
Reviewed-by: Matt Atwood <[email protected]>
> Signed-off-by: Gustavo Sousa <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_dmc.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dmc.c
> b/drivers/gpu/drm/i915/display/intel_dmc.c
> index c496e7a5c003..8ede90c033d8 100644
> --- a/drivers/gpu/drm/i915/display/intel_dmc.c
> +++ b/drivers/gpu/drm/i915/display/intel_dmc.c
> @@ -668,11 +668,11 @@ static bool need_pipedmc_load_program(struct
> intel_display *display)
> static bool need_pipedmc_load_mmio(struct intel_display *display, enum pipe
> pipe)
> {
> /*
> - * PTL:
> + * Xe3_LPD/Xe3p_LPD:
> * - pipe A/B DMC doesn't need save/restore
> * - pipe C/D DMC is in PG0, needs manual save/restore
> */
> - if (DISPLAY_VER(display) == 30)
> + if (IS_DISPLAY_VER(display, 30, 35))
> return pipe >= PIPE_C;
>
> /*
>
> --
> 2.51.0
>
