Enable PSR on eDP interface using drm self-refresh librabry. This patch uses a trigger from self-refresh library to enter/exit into PSR, when there are no updates from framework. Changes in V2: - Move dp functions to bridge code. - As per Dmitry review suggestions. Signed-off-by: Kalyan Thota <quic_kalyant@xxxxxxxxxxx> Signed-off-by: Vinod Polimera <quic_vpolimer@xxxxxxxxxxx> --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 31 +++++++++++++++++++++++++---- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 30 +++++++++++++++++++++++++++- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 +- 3 files changed, 57 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c index e7c9fe1..ba3240c 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -18,6 +18,7 @@ #include <drm/drm_probe_helper.h> #include <drm/drm_rect.h> #include <drm/drm_vblank.h> +#include <drm/drm_self_refresh_helper.h> #include "dpu_kms.h" #include "dpu_hw_lm.h" @@ -951,6 +952,14 @@ static void dpu_crtc_disable(struct drm_crtc *crtc, DRM_DEBUG_KMS("crtc%d\n", crtc->base.id); + if (old_crtc_state->self_refresh_active) { + drm_for_each_encoder_mask(encoder, crtc->dev, + old_crtc_state->encoder_mask) { + dpu_encoder_assign_crtc(encoder, NULL); + } + return; + } + /* Disable/save vblank irq handling */ drm_crtc_vblank_off(crtc); @@ -962,7 +971,12 @@ static void dpu_crtc_disable(struct drm_crtc *crtc, */ if (dpu_encoder_get_intf_mode(encoder) == INTF_MODE_VIDEO) release_bandwidth = true; - dpu_encoder_assign_crtc(encoder, NULL); + /* If disable is triggered during psr active(e.g: screen dim in PSR), + * we will need encoder->crtc connection to process the device sleep & + * preserve it during psr sequence. + */ + if (!crtc->state->self_refresh_active) + dpu_encoder_assign_crtc(encoder, NULL); } /* wait for frame_event_done completion */ @@ -1010,6 +1024,8 @@ static void dpu_crtc_enable(struct drm_crtc *crtc, struct dpu_crtc *dpu_crtc = to_dpu_crtc(crtc); struct drm_encoder *encoder; bool request_bandwidth = false; + struct drm_crtc_state *old_crtc_state = + drm_atomic_get_old_crtc_state(state, crtc); pm_runtime_get_sync(crtc->dev->dev); @@ -1032,8 +1048,10 @@ static void dpu_crtc_enable(struct drm_crtc *crtc, trace_dpu_crtc_enable(DRMID(crtc), true, dpu_crtc); dpu_crtc->enabled = true; - drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask) - dpu_encoder_assign_crtc(encoder, crtc); + if (!old_crtc_state->self_refresh_active) { + drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask) + dpu_encoder_assign_crtc(encoder, crtc); + } /* Enable/restore vblank irq handling */ drm_crtc_vblank_on(crtc); @@ -1497,7 +1515,7 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane, { struct drm_crtc *crtc = NULL; struct dpu_crtc *dpu_crtc = NULL; - int i; + int i, ret; dpu_crtc = kzalloc(sizeof(*dpu_crtc), GFP_KERNEL); if (!dpu_crtc) @@ -1534,6 +1552,11 @@ struct drm_crtc *dpu_crtc_init(struct drm_device *dev, struct drm_plane *plane, /* initialize event handling */ spin_lock_init(&dpu_crtc->event_lock); + ret = drm_self_refresh_helper_init(crtc); + if (ret) + DPU_ERROR("Failed to initialize %s with SR helpers %d\n", + crtc->name, ret); + DRM_DEBUG_KMS("%s: successfully initialized crtc\n", dpu_crtc->name); return crtc; } diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 6eac417..ba9d8ea 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -217,6 +217,14 @@ static u32 dither_matrix[DITHER_MATRIX_SZ] = { 15, 7, 13, 5, 3, 11, 1, 9, 12, 4, 14, 6, 0, 8, 2, 10 }; +static inline bool is_self_refresh_active(struct drm_crtc_state *state) +{ + if (state && state->self_refresh_active) + return true; + + return false; +} + static void _dpu_encoder_setup_dither(struct dpu_hw_pingpong *hw_pp, unsigned bpc) { struct dpu_hw_dither_cfg dither_cfg = { 0 }; @@ -629,7 +637,8 @@ static int dpu_encoder_virt_atomic_check( if (drm_atomic_crtc_needs_modeset(crtc_state)) { dpu_rm_release(global_state, drm_enc); - if (!crtc_state->active_changed || crtc_state->active) + if (!crtc_state->active_changed || crtc_state->active || + crtc_state->self_refresh_active) ret = dpu_rm_reserve(&dpu_kms->rm, global_state, drm_enc, crtc_state, topology); } @@ -1182,11 +1191,30 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc, { struct dpu_encoder_virt *dpu_enc = NULL; struct msm_drm_private *priv; + struct drm_crtc *crtc; + struct drm_crtc_state *old_state; int i = 0; dpu_enc = to_dpu_encoder_virt(drm_enc); DPU_DEBUG_ENC(dpu_enc, "\n"); + if (!drm_enc) { + DPU_ERROR("invalid encoder\n"); + return; + } + dpu_enc = to_dpu_encoder_virt(drm_enc); + + crtc = dpu_enc->crtc; + + old_state = drm_atomic_get_old_crtc_state(state, crtc); + + /* + * The encoder turn off already occurred when self refresh mode + * was set earlier, in the old_state for the corresponding crtc. + */ + if (drm_enc->encoder_type == DRM_MODE_ENCODER_TMDS && is_self_refresh_active(old_state)) + return; + mutex_lock(&dpu_enc->enc_lock); dpu_enc->enabled = false; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index 47fe11a..d550f90 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -495,7 +495,7 @@ static void dpu_kms_wait_for_commit_done(struct msm_kms *kms, return; } - if (!crtc->state->active) { + if (!drm_atomic_crtc_effectively_active(crtc->state)) { DPU_DEBUG("[crtc:%d] not active\n", crtc->base.id); return; } -- 2.7.4