On Fri, Feb 14, 2025 at 05:41:26PM +0530, Ankit Nautiyal wrote:
> During modeset enable sequence, program the fixed timings,
> and turn on the VRR Timing Generator (VRR TG) for platforms
> that always use VRR TG.
>
> Later if vrr timings are required, vrr_enable() will switch
> to the real VRR timings.
>
> With this we dont want to reset TRANS_CTL_VRR Enable bit while updating
> the vrr transcoder timings.
>
> v2: Update intel_vrr_set_transcoder_timings for fixed_rr.
> v3: Update intel_set_transcoder_timings_lrr for fixed_rr. (Ville)
> Add TRANS_PUSH while enabling VRR for fixed_rr.
>
> Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 10 +++++--
> drivers/gpu/drm/i915/display/intel_vrr.c | 29 ++++++++++++++++++--
> drivers/gpu/drm/i915/display/intel_vrr.h | 3 ++
> 3 files changed, 36 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 66c5ad46bfea..c9d1c091b109 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1755,6 +1755,7 @@ static void hsw_set_frame_start_delay(const struct
> intel_crtc_state *crtc_state)
>
> static void hsw_configure_cpu_transcoder(const struct intel_crtc_state
> *crtc_state)
> {
> + struct intel_display *display = to_intel_display(crtc_state);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
> @@ -1770,9 +1771,12 @@ static void hsw_configure_cpu_transcoder(const struct
> intel_crtc_state *crtc_sta
> }
>
> intel_set_transcoder_timings(crtc_state);
> - if (HAS_VRR(dev_priv))
> - intel_vrr_set_transcoder_timings(crtc_state);
> -
> + if (HAS_VRR(dev_priv)) {
> + if (intel_vrr_always_use_vrr_tg(display))
> + intel_vrr_enable_fixed_rr_timings(crtc_state);
> + else
> + intel_vrr_set_transcoder_timings(crtc_state);
I think intel_vrr_set_transcoder_timings() should just program the
fixed timings always. And we shouldn't do anything else here.
And I think the VRR_CTL enable/disable for the always_use_vrr_tg==true
case should be done at some more appropriate spot in the modeset
sequence. We can add eg. intel_vrr_trancoder_{enable,disable}() for
that part.
> + }
> if (cpu_transcoder != TRANSCODER_EDP)
> intel_de_write(dev_priv, TRANS_MULT(dev_priv, cpu_transcoder),
> crtc_state->pixel_multiplier - 1);
> diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c
> b/drivers/gpu/drm/i915/display/intel_vrr.c
> index e247055bc486..4151fcd0f978 100644
> --- a/drivers/gpu/drm/i915/display/intel_vrr.c
> +++ b/drivers/gpu/drm/i915/display/intel_vrr.c
> @@ -456,8 +456,12 @@ void intel_vrr_set_transcoder_timings(const struct
> intel_crtc_state *crtc_state)
> crtc_state->vrr.vmin - 1);
> intel_de_write(display, TRANS_VRR_VMAX(display, cpu_transcoder),
> crtc_state->vrr.vmax - 1);
> - intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
> - trans_vrr_ctl(crtc_state));
> + if (intel_vrr_always_use_vrr_tg(display))
> + intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
> + VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
> + else
> + intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
> + trans_vrr_ctl(crtc_state));
We should probably remove this VRR_CTL frobbing from here entirely,
and just always do it from the intel_vrr_trancoder_{enable,disable}().
And obviously for the !always_use_vrr_tg case we just skip setting
the enable bit there.
> intel_de_write(display, TRANS_VRR_FLIPLINE(display, cpu_transcoder),
> crtc_state->vrr.flipline - 1);
>
> @@ -536,7 +540,6 @@ bool intel_vrr_is_push_sent(const struct intel_crtc_state
> *crtc_state)
> return intel_de_read(display, TRANS_PUSH(display, cpu_transcoder)) &
> TRANS_PUSH_SEND;
> }
>
> -static
> bool intel_vrr_always_use_vrr_tg(struct intel_display *display)
> {
> if (!HAS_VRR(display))
> @@ -616,6 +619,26 @@ void intel_vrr_disable(const struct intel_crtc_state
> *old_crtc_state)
> intel_vrr_set_fixed_rr_timings(old_crtc_state);
> }
>
> +void intel_vrr_enable_fixed_rr_timings(const struct intel_crtc_state
> *crtc_state)
> +{
> + struct intel_display *display = to_intel_display(crtc_state);
> + enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
> +
> + intel_vrr_set_fixed_rr_timings(crtc_state);
> +
> + if (HAS_AS_SDP(display))
> + intel_de_write(display,
> + TRANS_VRR_VSYNC(display, cpu_transcoder),
> + VRR_VSYNC_END(crtc_state->vrr.vsync_end) |
> + VRR_VSYNC_START(crtc_state->vrr.vsync_start));
> +
> + intel_de_write(display, TRANS_PUSH(display, cpu_transcoder),
> + TRANS_PUSH_EN);
> +
> + intel_de_write(display, TRANS_VRR_CTL(display, cpu_transcoder),
> + VRR_CTL_VRR_ENABLE | trans_vrr_ctl(crtc_state));
> +}
> +
> static
> bool intel_vrr_is_fixed_rr(const struct intel_crtc_state *crtc_state)
> {
> diff --git a/drivers/gpu/drm/i915/display/intel_vrr.h
> b/drivers/gpu/drm/i915/display/intel_vrr.h
> index 514822577e8a..9259964978b1 100644
> --- a/drivers/gpu/drm/i915/display/intel_vrr.h
> +++ b/drivers/gpu/drm/i915/display/intel_vrr.h
> @@ -12,6 +12,7 @@ struct drm_connector_state;
> struct intel_atomic_state;
> struct intel_connector;
> struct intel_crtc_state;
> +struct intel_display;
> struct intel_dsb;
>
> bool intel_vrr_is_capable(struct intel_connector *connector);
> @@ -35,5 +36,7 @@ int intel_vrr_vmin_vtotal(const struct intel_crtc_state
> *crtc_state);
> int intel_vrr_vmax_vblank_start(const struct intel_crtc_state *crtc_state);
> int intel_vrr_vmin_vblank_start(const struct intel_crtc_state *crtc_state);
> int intel_vrr_vblank_delay(const struct intel_crtc_state *crtc_state);
> +bool intel_vrr_always_use_vrr_tg(struct intel_display *display);
> +void intel_vrr_enable_fixed_rr_timings(const struct intel_crtc_state
> *crtc_state);
>
> #endif /* __INTEL_VRR_H__ */
> --
> 2.45.2
--
Ville Syrjälä
Intel
