On Mon, Dec 20, 2021 at 12:05:40PM +0530, Animesh Manna wrote:
> Currently dev_priv->pps_lock is used for locking mechanism and one
> instance of pps registers are used for pps register programming.
> Second instance enabled as per port number and pps_lock is moved
> under encoder.
Nak. Please read commit e39b999a6f22 ("drm/i915: Fix edp vdd locking")
>
> Signed-off-by: Animesh Manna <[email protected]>
> ---
> .../drm/i915/display/intel_display_types.h | 3 ++
> drivers/gpu/drm/i915/display/intel_dp.c | 1 +
> drivers/gpu/drm/i915/display/intel_pps.c | 43 +++++++++----------
> drivers/gpu/drm/i915/i915_driver.c | 1 -
> drivers/gpu/drm/i915/i915_drv.h | 3 --
> 5 files changed, 24 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index c9c6efadf8b4..a091ad10c213 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1664,6 +1664,9 @@ struct intel_dp {
>
> /* When we last wrote the OUI for eDP */
> unsigned long last_oui_write;
> +
> + /* protects panel power sequencer state */
> + struct mutex pps_mutex;
> };
>
> enum lspcon_vendor {
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index b5e2508db1cf..a1ef497de773 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -5089,6 +5089,7 @@ intel_dp_init_connector(struct intel_digital_port
> *dig_port,
> intel_dp->reset_link_params = true;
> intel_dp->pps.pps_pipe = INVALID_PIPE;
> intel_dp->pps.active_pipe = INVALID_PIPE;
> + mutex_init(&intel_dp->pps_mutex);
>
> /* Preserve the current hw state. */
> intel_dp->DP = intel_de_read(dev_priv, intel_dp->output_reg);
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c
> b/drivers/gpu/drm/i915/display/intel_pps.c
> index e9c679bb1b2e..f6e86a17ea48 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.c
> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
> @@ -27,7 +27,7 @@ intel_wakeref_t intel_pps_lock(struct intel_dp *intel_dp)
> * See intel_pps_reset_all() why we need a power domain reference here.
> */
> wakeref = intel_display_power_get(dev_priv, POWER_DOMAIN_DISPLAY_CORE);
> - mutex_lock(&dev_priv->pps_mutex);
> + mutex_lock(&intel_dp->pps_mutex);
>
> return wakeref;
> }
> @@ -37,7 +37,7 @@ intel_wakeref_t intel_pps_unlock(struct intel_dp *intel_dp,
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>
> - mutex_unlock(&dev_priv->pps_mutex);
> + mutex_unlock(&intel_dp->pps_mutex);
> intel_display_power_put(dev_priv, POWER_DOMAIN_DISPLAY_CORE, wakeref);
>
> return 0;
> @@ -162,7 +162,7 @@ vlv_power_sequencer_pipe(struct intel_dp *intel_dp)
> struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> enum pipe pipe;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> /* We should never land here with regular DP ports */
> drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> @@ -210,7 +210,7 @@ bxt_power_sequencer_idx(struct intel_dp *intel_dp)
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> int backlight_controller = dev_priv->vbt.backlight.controller;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> /* We should never land here with regular DP ports */
> drm_WARN_ON(&dev_priv->drm, !intel_dp_is_edp(intel_dp));
> @@ -280,7 +280,7 @@ vlv_initial_power_sequencer_setup(struct intel_dp
> *intel_dp)
> struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
> enum port port = dig_port->base.port;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> /* try to find a pipe with this port selected */
> /* first pick one where the panel is on */
> @@ -359,7 +359,7 @@ static void intel_pps_get_registers(struct intel_dp
> *intel_dp,
> struct pps_registers *regs)
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> - int pps_idx = 0;
> + int pps_idx = dp_to_dig_port(intel_dp)->base.port;
>
> memset(regs, 0, sizeof(*regs));
>
> @@ -405,7 +405,7 @@ static bool edp_have_panel_power(struct intel_dp
> *intel_dp)
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> intel_dp->pps.pps_pipe == INVALID_PIPE)
> @@ -418,7 +418,7 @@ static bool edp_have_panel_vdd(struct intel_dp *intel_dp)
> {
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> intel_dp->pps.pps_pipe == INVALID_PIPE)
> @@ -461,7 +461,7 @@ static void wait_panel_status(struct intel_dp *intel_dp,
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> i915_reg_t pp_stat_reg, pp_ctrl_reg;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> intel_pps_verify_state(intel_dp);
>
> @@ -554,7 +554,7 @@ static u32 ilk_get_pp_control(struct intel_dp *intel_dp)
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> u32 control;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> control = intel_de_read(dev_priv, _pp_ctrl_reg(intel_dp));
> if (drm_WARN_ON(&dev_priv->drm, !HAS_DDI(dev_priv) &&
> @@ -578,7 +578,7 @@ bool intel_pps_vdd_on_unlocked(struct intel_dp *intel_dp)
> i915_reg_t pp_stat_reg, pp_ctrl_reg;
> bool need_to_disable = !intel_dp->pps.want_panel_vdd;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if (!intel_dp_is_edp(intel_dp))
> return false;
> @@ -655,7 +655,7 @@ static void intel_pps_vdd_off_sync_unlocked(struct
> intel_dp *intel_dp)
> u32 pp;
> i915_reg_t pp_stat_reg, pp_ctrl_reg;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> drm_WARN_ON(&dev_priv->drm, intel_dp->pps.want_panel_vdd);
>
> @@ -737,9 +737,7 @@ static void edp_panel_vdd_schedule_off(struct intel_dp
> *intel_dp)
> */
> void intel_pps_vdd_off_unlocked(struct intel_dp *intel_dp, bool sync)
> {
> - struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> -
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if (!intel_dp_is_edp(intel_dp))
> return;
> @@ -762,7 +760,7 @@ void intel_pps_on_unlocked(struct intel_dp *intel_dp)
> u32 pp;
> i915_reg_t pp_ctrl_reg;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if (!intel_dp_is_edp(intel_dp))
> return;
> @@ -823,7 +821,7 @@ void intel_pps_off_unlocked(struct intel_dp *intel_dp)
> u32 pp;
> i915_reg_t pp_ctrl_reg;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if (!intel_dp_is_edp(intel_dp))
> return;
> @@ -982,11 +980,10 @@ static void vlv_steal_power_sequencer(struct
> drm_i915_private *dev_priv,
> {
> struct intel_encoder *encoder;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> -
> for_each_intel_dp(&dev_priv->drm, encoder) {
> struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
>
> + lockdep_assert_held(&intel_dp->pps_mutex);
> drm_WARN(&dev_priv->drm, intel_dp->pps.active_pipe == pipe,
> "stealing pipe %c power sequencer from active
> [ENCODER:%d:%s]\n",
> pipe_name(pipe), encoder->base.base.id,
> @@ -1012,7 +1009,7 @@ void vlv_pps_init(struct intel_encoder *encoder,
> struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> drm_WARN_ON(&dev_priv->drm, intel_dp->pps.active_pipe != INVALID_PIPE);
>
> @@ -1055,7 +1052,7 @@ static void intel_pps_vdd_sanitize(struct intel_dp
> *intel_dp)
> struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> if (!edp_have_panel_vdd(intel_dp))
> return;
> @@ -1160,7 +1157,7 @@ static void pps_init_delays(struct intel_dp *intel_dp)
> struct edp_power_seq cur, vbt, spec,
> *final = &intel_dp->pps.pps_delays;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> /* already initialized? */
> if (final->t11_t12 != 0)
> @@ -1258,7 +1255,7 @@ static void pps_init_registers(struct intel_dp
> *intel_dp, bool force_disable_vdd
> enum port port = dp_to_dig_port(intel_dp)->base.port;
> const struct edp_power_seq *seq = &intel_dp->pps.pps_delays;
>
> - lockdep_assert_held(&dev_priv->pps_mutex);
> + lockdep_assert_held(&intel_dp->pps_mutex);
>
> intel_pps_get_registers(intel_dp, ®s);
>
> diff --git a/drivers/gpu/drm/i915/i915_driver.c
> b/drivers/gpu/drm/i915/i915_driver.c
> index 95174938b160..9e337e4216d7 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -327,7 +327,6 @@ static int i915_driver_early_probe(struct
> drm_i915_private *dev_priv)
>
> mutex_init(&dev_priv->audio.mutex);
> mutex_init(&dev_priv->wm.wm_mutex);
> - mutex_init(&dev_priv->pps_mutex);
> mutex_init(&dev_priv->hdcp_comp_mutex);
>
> i915_memcpy_init_early(dev_priv);
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 471be2716abe..4680e1c84985 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -749,9 +749,6 @@ struct drm_i915_private {
> /* backlight registers and fields in struct intel_panel */
> struct mutex backlight_lock;
>
> - /* protects panel power sequencer state */
> - struct mutex pps_mutex;
> -
> unsigned int fsb_freq, mem_freq, is_ddr3;
> unsigned int skl_preferred_vco_freq;
> unsigned int max_cdclk_freq;
> --
> 2.29.0
--
Ville Syrjälä
Intel
