> -----Original Message-----
> From: Intel-gfx <[email protected]> On Behalf Of Jouni
> Högander
> Sent: Friday, January 5, 2024 7:45 PM
> To: [email protected]
> Subject: [PATCH v2 2/4] drm/i915/psr: Add alpm_parameters struct
>
> Add new alpm_parameters struct into intel_psr for all calculated alpm
> parameters.
>
> Signed-off-by: Jouni Högander <[email protected]>
> ---
> .../drm/i915/display/intel_display_types.h | 8 ++++--
> drivers/gpu/drm/i915/display/intel_psr.c | 28 ++++++++++---------
> 2 files changed, 21 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index b9b9d9f2bc0b..889a8b34b7ac 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1677,6 +1677,11 @@ struct intel_pps {
> struct edp_power_seq bios_pps_delays;
> };
>
> +struct alpm_parameters {
> + u8 io_wake_lines;
> + u8 fast_wake_lines;
> +};
Assume that this is being used in PSR as well and can be retained in intel_psr
struct.
If exclusively used for alpm then having it in a new alpm struct would be
better.
Thanks and Regards,
Arun R Murthy
-------------------
> +
> struct intel_psr {
> /* Mutex for PSR state of the transcoder */
> struct mutex lock;
> @@ -1706,8 +1711,6 @@ struct intel_psr {
> bool psr2_sel_fetch_cff_enabled;
> bool req_psr2_sdp_prior_scanline;
> u8 sink_sync_latency;
> - u8 io_wake_lines;
> - u8 fast_wake_lines;
> ktime_t last_entry_attempt;
> ktime_t last_exit;
> bool sink_not_reliable;
> @@ -1721,6 +1724,7 @@ struct intel_psr {
> u32 dc3co_exit_delay;
> struct delayed_work dc3co_work;
> u8 entry_setup_frames;
> + struct alpm_parameters alpm_params;
> };
>
> struct intel_dp {
> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c
> b/drivers/gpu/drm/i915/display/intel_psr.c
> index 54120b45958b..1709ebb31215 100644
> --- a/drivers/gpu/drm/i915/display/intel_psr.c
> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> @@ -759,8 +759,8 @@ static u32 intel_psr2_get_tp_time(struct intel_dp
> *intel_dp)
>
> static int psr2_block_count_lines(struct intel_dp *intel_dp) {
> - return intel_dp->psr.io_wake_lines < 9 &&
> - intel_dp->psr.fast_wake_lines < 9 ? 8 : 12;
> + return intel_dp->psr.alpm_params.io_wake_lines < 9 &&
> + intel_dp->psr.alpm_params.fast_wake_lines < 9 ? 8 : 12;
> }
>
> static int psr2_block_count(struct intel_dp *intel_dp) @@ -797,6 +797,7 @@
> static void dg2_activate_panel_replay(struct intel_dp *intel_dp) static void
> hsw_activate_psr2(struct intel_dp *intel_dp) {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> + struct alpm_parameters *alpm_params = &intel_dp->psr.alpm_params;
> enum transcoder cpu_transcoder = intel_dp->psr.transcoder;
> u32 val = EDP_PSR2_ENABLE;
> u32 psr_val = 0;
> @@ -838,17 +839,17 @@ static void hsw_activate_psr2(struct intel_dp
> *intel_dp)
> */
> int tmp;
>
> - tmp = map[intel_dp->psr.io_wake_lines -
> TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES];
> + tmp = map[alpm_params->io_wake_lines -
> +TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES];
> val |= TGL_EDP_PSR2_IO_BUFFER_WAKE(tmp +
> TGL_EDP_PSR2_IO_BUFFER_WAKE_MIN_LINES);
>
> - tmp = map[intel_dp->psr.fast_wake_lines -
> TGL_EDP_PSR2_FAST_WAKE_MIN_LINES];
> + tmp = map[alpm_params->fast_wake_lines -
> +TGL_EDP_PSR2_FAST_WAKE_MIN_LINES];
> val |= TGL_EDP_PSR2_FAST_WAKE(tmp +
> TGL_EDP_PSR2_FAST_WAKE_MIN_LINES);
> } else if (DISPLAY_VER(dev_priv) >= 12) {
> - val |= TGL_EDP_PSR2_IO_BUFFER_WAKE(intel_dp-
> >psr.io_wake_lines);
> - val |= TGL_EDP_PSR2_FAST_WAKE(intel_dp-
> >psr.fast_wake_lines);
> + val |= TGL_EDP_PSR2_IO_BUFFER_WAKE(alpm_params-
> >io_wake_lines);
> + val |= TGL_EDP_PSR2_FAST_WAKE(alpm_params-
> >fast_wake_lines);
> } else if (DISPLAY_VER(dev_priv) >= 9) {
> - val |= EDP_PSR2_IO_BUFFER_WAKE(intel_dp-
> >psr.io_wake_lines);
> - val |= EDP_PSR2_FAST_WAKE(intel_dp->psr.fast_wake_lines);
> + val |= EDP_PSR2_IO_BUFFER_WAKE(alpm_params-
> >io_wake_lines);
> + val |= EDP_PSR2_FAST_WAKE(alpm_params->fast_wake_lines);
> }
>
> if (intel_dp->psr.req_psr2_sdp_prior_scanline)
> @@ -1098,10 +1099,11 @@ static bool
> _compute_psr2_sdp_prior_scanline_indication(struct intel_dp *intel_d
> return true;
> }
>
> -static bool _compute_psr2_wake_times(struct intel_dp *intel_dp,
> - struct intel_crtc_state *crtc_state)
> +static bool _compute_alpm_params(struct intel_dp *intel_dp,
> + struct intel_crtc_state *crtc_state)
> {
> struct drm_i915_private *i915 = dp_to_i915(intel_dp);
> + struct alpm_parameters *alpm_params = &intel_dp->psr.alpm_params;
> int io_wake_lines, io_wake_time, fast_wake_lines, fast_wake_time;
> u8 max_wake_lines;
>
> @@ -1132,8 +1134,8 @@ static bool _compute_psr2_wake_times(struct
> intel_dp *intel_dp,
> io_wake_lines = fast_wake_lines = max_wake_lines;
>
> /* According to Bspec lower limit should be set as 7 lines. */
> - intel_dp->psr.io_wake_lines = max(io_wake_lines, 7);
> - intel_dp->psr.fast_wake_lines = max(fast_wake_lines, 7);
> + alpm_params->io_wake_lines = max(io_wake_lines, 7);
> + alpm_params->fast_wake_lines = max(fast_wake_lines, 7);
>
> return true;
> }
> @@ -1265,7 +1267,7 @@ static bool intel_psr2_config_valid(struct intel_dp
> *intel_dp,
> return false;
> }
>
> - if (!_compute_psr2_wake_times(intel_dp, crtc_state)) {
> + if (!_compute_alpm_params(intel_dp, crtc_state)) {
> drm_dbg_kms(&dev_priv->drm,
> "PSR2 not enabled, Unable to use long enough wake
> times\n");
> return false;
> --
> 2.34.1
