On Mon, Mar 22, 2021 at 01:58:05PM -0700, José Roberto de Souza wrote:
> Display features should not be initialized or de-initialized when there
> is no display. Skip modeset initialization, output setup, plane, crtc,
> encoder, connector registration, display cdclk and rawclk
> initialization, display core initialization, etc.
>
> Skip the functionality at as high level as possible, and remove any
> redundant checks. If the functionality is conditional to *other* display
> checks, do not add more. If the un-initialization has checks for
> initialization, do not add more.
>
> We explicitly do not care about any GMCH/VLV/CHV code paths, as they've
> always had and will have display.
>
> Cc: Lucas De Marchi <lucas.demar...@intel.com>
Reviewed-by: Radhakrishna Sripada <radhakrishna.srip...@intel.com>
> Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
> Signed-off-by: Jani Nikula <jani.nik...@intel.com>
> Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 44 +++++++++++++++----
> .../drm/i915/display/intel_display_power.c | 36 +++++++++++++++
> drivers/gpu/drm/i915/display/intel_dp.c | 6 +++
> drivers/gpu/drm/i915/display/intel_gmbus.c | 3 --
> drivers/gpu/drm/i915/display/intel_hotplug.c | 12 +++++
> drivers/gpu/drm/i915/display/intel_pps.c | 5 ++-
> drivers/gpu/drm/i915/i915_drv.c | 28 +++++++++---
> drivers/gpu/drm/i915/i915_suspend.c | 6 +++
> 8 files changed, 120 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 7b38b9a38b85..b10bf7e06ee7 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -1613,6 +1613,9 @@ u32 intel_plane_fb_max_stride(struct drm_i915_private
> *dev_priv,
> struct intel_crtc *crtc;
> struct intel_plane *plane;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return 0;
> +
> /*
> * We assume the primary plane for pipe A has
> * the highest stride limits of them all,
> @@ -4629,6 +4632,9 @@ int intel_display_suspend(struct drm_device *dev)
> struct drm_atomic_state *state;
> int ret;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return 0;
> +
> state = drm_atomic_helper_suspend(dev);
> ret = PTR_ERR_OR_ZERO(state);
> if (ret)
> @@ -12239,6 +12245,9 @@ static const struct drm_mode_config_funcs
> intel_mode_funcs = {
> */
> void intel_init_display_hooks(struct drm_i915_private *dev_priv)
> {
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> intel_init_cdclk_hooks(dev_priv);
> intel_init_audio_hooks(dev_priv);
>
> @@ -12281,8 +12290,12 @@ void intel_init_display_hooks(struct
> drm_i915_private *dev_priv)
>
> void intel_modeset_init_hw(struct drm_i915_private *i915)
> {
> - struct intel_cdclk_state *cdclk_state =
> - to_intel_cdclk_state(i915->cdclk.obj.state);
> + struct intel_cdclk_state *cdclk_state;
> +
> + if (!HAS_DISPLAY(i915))
> + return;
> +
> + cdclk_state = to_intel_cdclk_state(i915->cdclk.obj.state);
>
> intel_update_cdclk(i915);
> intel_dump_cdclk_config(&i915->cdclk.hw, "Current CDCLK");
> @@ -12598,6 +12611,9 @@ int intel_modeset_init_noirq(struct drm_i915_private
> *i915)
> /* FIXME: completely on the wrong abstraction layer */
> intel_power_domains_init_hw(i915, false);
>
> + if (!HAS_DISPLAY(i915))
> + return 0;
> +
> intel_csr_ucode_init(i915);
>
> i915->modeset_wq = alloc_ordered_workqueue("i915_modeset", 0);
> @@ -12648,6 +12664,9 @@ int intel_modeset_init_nogem(struct drm_i915_private
> *i915)
> struct intel_crtc *crtc;
> int ret;
>
> + if (!HAS_DISPLAY(i915))
> + return 0;
> +
> intel_init_pm(i915);
>
> intel_panel_sanitize_ssc(i915);
> @@ -12660,13 +12679,11 @@ int intel_modeset_init_nogem(struct
> drm_i915_private *i915)
> INTEL_NUM_PIPES(i915),
> INTEL_NUM_PIPES(i915) > 1 ? "s" : "");
>
> - if (HAS_DISPLAY(i915)) {
> - for_each_pipe(i915, pipe) {
> - ret = intel_crtc_init(i915, pipe);
> - if (ret) {
> - intel_mode_config_cleanup(i915);
> - return ret;
> - }
> + for_each_pipe(i915, pipe) {
> + ret = intel_crtc_init(i915, pipe);
> + if (ret) {
> + intel_mode_config_cleanup(i915);
> + return ret;
> }
> }
>
> @@ -13602,6 +13619,9 @@ void intel_display_resume(struct drm_device *dev)
> struct drm_modeset_acquire_ctx ctx;
> int ret;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> dev_priv->modeset_restore_state = NULL;
> if (state)
> state->acquire_ctx = &ctx;
> @@ -13651,6 +13671,9 @@ static void intel_hpd_poll_fini(struct
> drm_i915_private *i915)
> /* part #1: call before irq uninstall */
> void intel_modeset_driver_remove(struct drm_i915_private *i915)
> {
> + if (!HAS_DISPLAY(i915))
> + return;
> +
> flush_workqueue(i915->flip_wq);
> flush_workqueue(i915->modeset_wq);
>
> @@ -13661,6 +13684,9 @@ void intel_modeset_driver_remove(struct
> drm_i915_private *i915)
> /* part #2: call after irq uninstall */
> void intel_modeset_driver_remove_noirq(struct drm_i915_private *i915)
> {
> + if (!HAS_DISPLAY(i915))
> + return;
> +
> /*
> * Due to the hpd irq storm handling the hotplug work can re-arm the
> * poll handlers. Hence disable polling after hpd handling is shut down.
> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c
> b/drivers/gpu/drm/i915/display/intel_display_power.c
> index e6a3b3e6b1f7..efacd6aba3d0 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
> @@ -821,6 +821,9 @@ static void gen9_sanitize_dc_state(struct
> drm_i915_private *dev_priv)
> {
> u32 val;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> val = intel_de_read(dev_priv, DC_STATE_EN) & gen9_dc_mask(dev_priv);
>
> drm_dbg_kms(&dev_priv->drm,
> @@ -857,6 +860,9 @@ static void gen9_set_dc_state(struct drm_i915_private
> *dev_priv, u32 state)
> u32 val;
> u32 mask;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> if (drm_WARN_ON_ONCE(&dev_priv->drm,
> state & ~dev_priv->csr.allowed_dc_mask))
> state &= dev_priv->csr.allowed_dc_mask;
> @@ -1181,6 +1187,9 @@ static void gen9_disable_dc_states(struct
> drm_i915_private *dev_priv)
>
> gen9_set_dc_state(dev_priv, DC_STATE_DISABLE);
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> dev_priv->display.get_cdclk(dev_priv, &cdclk_config);
> /* Can't read out voltage_level so can't use intel_cdclk_changed() */
> drm_WARN_ON(&dev_priv->drm,
> @@ -4533,6 +4542,9 @@ static u32 get_allowed_dc_mask(const struct
> drm_i915_private *dev_priv,
> int requested_dc;
> int max_dc;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return 0;
> +
> if (IS_DG1(dev_priv))
> max_dc = 3;
> else if (INTEL_GEN(dev_priv) >= 12)
> @@ -5125,6 +5137,9 @@ static void skl_display_core_init(struct
> drm_i915_private *dev_priv,
> /* enable PCH reset handshake */
> intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /* enable PG1 and Misc I/O */
> mutex_lock(&power_domains->lock);
>
> @@ -5149,6 +5164,9 @@ static void skl_display_core_uninit(struct
> drm_i915_private *dev_priv)
> struct i915_power_domains *power_domains = &dev_priv->power_domains;
> struct i915_power_well *well;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> gen9_disable_dc_states(dev_priv);
>
> gen9_dbuf_disable(dev_priv);
> @@ -5189,6 +5207,9 @@ static void bxt_display_core_init(struct
> drm_i915_private *dev_priv, bool resume
> */
> intel_pch_reset_handshake(dev_priv, false);
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /* Enable PG1 */
> mutex_lock(&power_domains->lock);
>
> @@ -5210,6 +5231,9 @@ static void bxt_display_core_uninit(struct
> drm_i915_private *dev_priv)
> struct i915_power_domains *power_domains = &dev_priv->power_domains;
> struct i915_power_well *well;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> gen9_disable_dc_states(dev_priv);
>
> gen9_dbuf_disable(dev_priv);
> @@ -5243,6 +5267,9 @@ static void cnl_display_core_init(struct
> drm_i915_private *dev_priv, bool resume
> /* 1. Enable PCH Reset Handshake */
> intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /* 2-3. */
> intel_combo_phy_init(dev_priv);
>
> @@ -5270,6 +5297,9 @@ static void cnl_display_core_uninit(struct
> drm_i915_private *dev_priv)
> struct i915_power_domains *power_domains = &dev_priv->power_domains;
> struct i915_power_well *well;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> gen9_disable_dc_states(dev_priv);
>
> /* 1. Disable all display engine functions -> aready done */
> @@ -5384,6 +5414,9 @@ static void icl_display_core_init(struct
> drm_i915_private *dev_priv,
> /* 1. Enable PCH reset handshake. */
> intel_pch_reset_handshake(dev_priv, !HAS_PCH_NOP(dev_priv));
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /* 2. Initialize all combo phys */
> intel_combo_phy_init(dev_priv);
>
> @@ -5428,6 +5461,9 @@ static void icl_display_core_uninit(struct
> drm_i915_private *dev_priv)
> struct i915_power_domains *power_domains = &dev_priv->power_domains;
> struct i915_power_well *well;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> gen9_disable_dc_states(dev_priv);
>
> /* 1. Disable all display engine functions -> aready done */
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 1400c5b44c83..fc00bacd00c4 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -5427,6 +5427,9 @@ void intel_dp_mst_suspend(struct drm_i915_private
> *dev_priv)
> {
> struct intel_encoder *encoder;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> for_each_intel_encoder(&dev_priv->drm, encoder) {
> struct intel_dp *intel_dp;
>
> @@ -5447,6 +5450,9 @@ void intel_dp_mst_resume(struct drm_i915_private
> *dev_priv)
> {
> struct intel_encoder *encoder;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> for_each_intel_encoder(&dev_priv->drm, encoder) {
> struct intel_dp *intel_dp;
> int ret;
> diff --git a/drivers/gpu/drm/i915/display/intel_gmbus.c
> b/drivers/gpu/drm/i915/display/intel_gmbus.c
> index 0c952e1d720e..5ee599d20050 100644
> --- a/drivers/gpu/drm/i915/display/intel_gmbus.c
> +++ b/drivers/gpu/drm/i915/display/intel_gmbus.c
> @@ -845,9 +845,6 @@ int intel_gmbus_setup(struct drm_i915_private *dev_priv)
> unsigned int pin;
> int ret;
>
> - if (!HAS_DISPLAY(dev_priv))
> - return 0;
> -
> if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
> dev_priv->gpio_mmio_base = VLV_DISPLAY_BASE;
> else if (!HAS_GMCH(dev_priv))
> diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c
> b/drivers/gpu/drm/i915/display/intel_hotplug.c
> index f46a1b7190b8..47c85ac97c87 100644
> --- a/drivers/gpu/drm/i915/display/intel_hotplug.c
> +++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
> @@ -595,6 +595,9 @@ void intel_hpd_init(struct drm_i915_private *dev_priv)
> {
> int i;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> for_each_hpd_pin(i) {
> dev_priv->hotplug.stats[i].count = 0;
> dev_priv->hotplug.stats[i].state = HPD_ENABLED;
> @@ -670,6 +673,9 @@ static void i915_hpd_poll_init_work(struct work_struct
> *work)
> */
> void intel_hpd_poll_enable(struct drm_i915_private *dev_priv)
> {
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> WRITE_ONCE(dev_priv->hotplug.poll_enabled, true);
>
> /*
> @@ -702,6 +708,9 @@ void intel_hpd_poll_enable(struct drm_i915_private
> *dev_priv)
> */
> void intel_hpd_poll_disable(struct drm_i915_private *dev_priv)
> {
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> WRITE_ONCE(dev_priv->hotplug.poll_enabled, false);
> schedule_work(&dev_priv->hotplug.poll_init_work);
> }
> @@ -718,6 +727,9 @@ void intel_hpd_init_work(struct drm_i915_private
> *dev_priv)
>
> void intel_hpd_cancel_work(struct drm_i915_private *dev_priv)
> {
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> spin_lock_irq(&dev_priv->irq_lock);
>
> dev_priv->hotplug.long_port_mask = 0;
> diff --git a/drivers/gpu/drm/i915/display/intel_pps.c
> b/drivers/gpu/drm/i915/display/intel_pps.c
> index 932f56951914..e1aacd25c9d8 100644
> --- a/drivers/gpu/drm/i915/display/intel_pps.c
> +++ b/drivers/gpu/drm/i915/display/intel_pps.c
> @@ -319,6 +319,9 @@ void intel_pps_reset_all(struct drm_i915_private
> *dev_priv)
> IS_GEN9_LP(dev_priv))))
> return;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /*
> * We can't grab pps_mutex here due to deadlock with power_domain
> * mutex when power_domain functions are called while holding pps_mutex.
> @@ -1378,7 +1381,7 @@ void intel_pps_unlock_regs_wa(struct drm_i915_private
> *dev_priv)
> int pps_num;
> int pps_idx;
>
> - if (HAS_DDI(dev_priv))
> + if (!HAS_DISPLAY(dev_priv) || HAS_DDI(dev_priv))
> return;
> /*
> * This w/a is needed at least on CPT/PPT, but to be sure apply it
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 64edcab59fe1..ee27962a6044 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -977,8 +977,12 @@ static int i915_driver_open(struct drm_device *dev,
> struct drm_file *file)
> */
> static void i915_driver_lastclose(struct drm_device *dev)
> {
> + struct drm_i915_private *i915 = to_i915(dev);
> +
> intel_fbdev_restore_mode(dev);
> - vga_switcheroo_process_delayed_switch();
> +
> + if (HAS_DISPLAY(i915))
> + vga_switcheroo_process_delayed_switch();
> }
>
> static void i915_driver_postclose(struct drm_device *dev, struct drm_file
> *file)
> @@ -999,6 +1003,9 @@ static void intel_suspend_encoders(struct
> drm_i915_private *dev_priv)
> struct drm_device *dev = &dev_priv->drm;
> struct intel_encoder *encoder;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> drm_modeset_lock_all(dev);
> for_each_intel_encoder(dev, encoder)
> if (encoder->suspend)
> @@ -1011,6 +1018,9 @@ static void intel_shutdown_encoders(struct
> drm_i915_private *dev_priv)
> struct drm_device *dev = &dev_priv->drm;
> struct intel_encoder *encoder;
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> drm_modeset_lock_all(dev);
> for_each_intel_encoder(dev, encoder)
> if (encoder->shutdown)
> @@ -1026,9 +1036,11 @@ void i915_driver_shutdown(struct drm_i915_private
> *i915)
>
> i915_gem_suspend(i915);
>
> - drm_kms_helper_poll_disable(&i915->drm);
> + if (HAS_DISPLAY(i915)) {
> + drm_kms_helper_poll_disable(&i915->drm);
>
> - drm_atomic_helper_shutdown(&i915->drm);
> + drm_atomic_helper_shutdown(&i915->drm);
> + }
>
> intel_dp_mst_suspend(i915);
>
> @@ -1084,8 +1096,8 @@ static int i915_drm_suspend(struct drm_device *dev)
> /* We do a lot of poking in a lot of registers, make sure they work
> * properly. */
> intel_power_domains_disable(dev_priv);
> -
> - drm_kms_helper_poll_disable(dev);
> + if (HAS_DISPLAY(dev_priv))
> + drm_kms_helper_poll_disable(dev);
>
> pci_save_state(pdev);
>
> @@ -1232,7 +1244,8 @@ static int i915_drm_resume(struct drm_device *dev)
> */
> intel_runtime_pm_enable_interrupts(dev_priv);
>
> - drm_mode_config_reset(dev);
> + if (HAS_DISPLAY(dev_priv))
> + drm_mode_config_reset(dev);
>
> i915_gem_resume(dev_priv);
>
> @@ -1245,7 +1258,8 @@ static int i915_drm_resume(struct drm_device *dev)
> intel_display_resume(dev);
>
> intel_hpd_poll_disable(dev_priv);
> - drm_kms_helper_poll_enable(dev);
> + if (HAS_DISPLAY(dev_priv))
> + drm_kms_helper_poll_enable(dev);
>
> intel_opregion_resume(dev_priv);
>
> diff --git a/drivers/gpu/drm/i915/i915_suspend.c
> b/drivers/gpu/drm/i915/i915_suspend.c
> index 0bc7b49f843c..5fcc32821e18 100644
> --- a/drivers/gpu/drm/i915/i915_suspend.c
> +++ b/drivers/gpu/drm/i915/i915_suspend.c
> @@ -87,6 +87,9 @@ void i915_save_display(struct drm_i915_private *dev_priv)
> {
> struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> /* Display arbitration control */
> if (INTEL_GEN(dev_priv) <= 4)
> dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, DSPARB);
> @@ -102,6 +105,9 @@ void i915_restore_display(struct drm_i915_private
> *dev_priv)
> {
> struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
>
> + if (!HAS_DISPLAY(dev_priv))
> + return;
> +
> intel_restore_swf(dev_priv);
>
> if (IS_GEN(dev_priv, 4))
> --
> 2.31.0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
