On 2024-08-15 21:37, Hamza Mahfooz wrote:
> Hook up drm_crtc_vblank_on_config() in amdgpu_dm. So, that we can enable
> PSR and other static screen optimizations more quickly, while avoiding
> stuttering issues that are accompanied by the following dmesg error:
>
> [drm:dc_dmub_srv_wait_idle [amdgpu]] *ERROR* Error waiting for DMUB idle:
> status=3
>
> This also allows us to mimic how vblanking is handled by the windows
> amdgpu driver.
>
> Signed-off-by: Hamza Mahfooz <hamza.mahf...@amd.com>
> ---
> v3: use a less conservative policy
>
> [...]
>
> @@ -8244,9 +8244,36 @@ static void manage_dm_interrupts(struct amdgpu_device
> *adev,
> amdgpu_display_crtc_idx_to_irq_type(
> adev,
> acrtc->crtc_id);
> + struct drm_vblank_crtc_config config = {0};
> + struct dc_crtc_timing *timing;
> + int vsync_rate_hz;
> + int offdelay = 30;
> +
> + if (acrtc_state) {
> + timing = &acrtc_state->stream->timing;
> +
> + vsync_rate_hz = div64_u64(div64_u64((timing->pix_clk_100hz *
> + (u64)100),
> + timing->v_total),
> + timing->h_total);
AFAICT this can be done with a single division:
vsync_rate_hz = div64_u64((u64)timing->pix_clk_100hz * 100,
(u64)timing->v_total *
timing->h_total);
> + if (amdgpu_ip_version(adev, DCE_HWIP, 0) <
> + IP_VERSION(3, 5, 0) ||
> + acrtc_state->stream->link->psr_settings.psr_version <
> + DC_PSR_VERSION_UNSUPPORTED) {
> + if (vsync_rate_hz)
> + /* at least 2 frames */
> + offdelay = 2000 / vsync_rate_hz + 1;
Or even this:
2000 / (timing->pix_clk_100hz * 100 / (timing->v_total * timing->h_total)) =
2000 / 100 * timing->v_total * timing->h_total / timing->pix_clk_100hz =
20 * timing->v_total * timing->h_total / timing->pix_clk_100hz
⇒ offdelay = div64_u64((u64)20 * timing->v_total * timing->h_total,
timing->pix_clk_100hz) + 1;
--
Earthling Michel Dänzer \ GNOME / Xwayland / Mesa developer
https://redhat.com \ Libre software enthusiast
