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Mon, 18 Aug 2025 18:32:14 -0700 (PDT) From: Jun Nie Date: Tue, 19 Aug 2025 09:31:07 +0800 Subject: [PATCH v15 13/13] drm/msm/dpu: Enable quad-pipe for DSC and dual-DSI case Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250819-v6-16-rc2-quad-pipe-upstream-v15-13-2c7a85089db8@linaro.org> References: <20250819-v6-16-rc2-quad-pipe-upstream-v15-0-2c7a85089db8@linaro.org> In-Reply-To: <20250819-v6-16-rc2-quad-pipe-upstream-v15-0-2c7a85089db8@linaro.org> To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , Marijn Suijten , David Airlie , Simona Vetter , Jessica Zhang Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, Jun Nie , Dmitry Baryshkov X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1755567061; l=8147; i=jun.nie@linaro.org; s=20240403; h=from:subject:message-id; bh=L0RJjmTLlYkHLbKt8l66Y1ANmmW3YDpsTiGU9UI7WH8=; b=ZcJ6S3WHQXRsMtgbOv482z83OBDYeGPM5nwtD0j76evpw/yvxjqIIAO2RxVIUUq8RJGq/nIgR GYZAkyzZd6tCRN2BIpz1aUStpKb+sw1/+d0rbEzRHK4hvdyliOc3kUr X-Developer-Key: i=jun.nie@linaro.org; a=ed25519; pk=MNiBt/faLPvo+iJoP1hodyY2x6ozVXL8QMptmsKg3cc= To support high-resolution cases that exceed the width limitation of a pair of SSPPs, or scenarios that surpass the maximum MDP clock rate, additional pipes are necessary to enable parallel data processing within the SSPP width constraints and MDP clock rate. Request 4 mixers and 4 DSCs for high-resolution cases where both DSC and dual interfaces are enabled. More use cases can be incorporated later if quad-pipe capabilities are required. Signed-off-by: Jun Nie Reviewed-by: Dmitry Baryshkov Reviewed-by: Jessica Zhang --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 27 +++++++++++++++++---= --- drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h | 6 ++--- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 28 ++++++++------------= ---- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 2 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 2 +- drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h | 2 +- 6 files changed, 35 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm= /disp/dpu1/dpu_crtc.c index 1c7a5e545745320018c3e9a2d163cbfd3dceaf7b..2625ad777e477d2d5a6a746989b= b9e10493e19ad 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c @@ -200,7 +200,7 @@ static int dpu_crtc_get_lm_crc(struct drm_crtc *crtc, struct dpu_crtc_state *crtc_state) { struct dpu_crtc_mixer *m; - u32 crcs[CRTC_DUAL_MIXERS]; + u32 crcs[CRTC_QUAD_MIXERS]; =20 int rc =3D 0; int i; @@ -1328,6 +1328,7 @@ static struct msm_display_topology dpu_crtc_get_topol= ogy( struct drm_display_mode *mode =3D &crtc_state->adjusted_mode; struct msm_display_topology topology =3D {0}; struct drm_encoder *drm_enc; + u32 num_rt_intf; =20 drm_for_each_encoder_mask(drm_enc, crtc->dev, crtc_state->encoder_mask) dpu_encoder_update_topology(drm_enc, &topology, crtc_state->state, @@ -1341,11 +1342,14 @@ static struct msm_display_topology dpu_crtc_get_top= ology( * Dual display * 2 LM, 2 INTF ( Split display using 2 interfaces) * + * If DSC is enabled, try to use 4:4:2 topology if there is enough + * resource. Otherwise, use 2:2:2 topology. + * * Single display * 1 LM, 1 INTF * 2 LM, 1 INTF (stream merge to support high resolution interfaces) * - * If DSC is enabled, use 2 LMs for 2:2:1 topology + * If DSC is enabled, use 2:2:1 topology * * Add dspps to the reservation requirements if ctm is requested * @@ -1357,14 +1361,23 @@ static struct msm_display_topology dpu_crtc_get_top= ology( * (mode->hdisplay > MAX_HDISPLAY_SPLIT) check. */ =20 - if (topology.num_intf =3D=3D 2 && !topology.cwb_enabled) - topology.num_lm =3D 2; - else if (topology.num_dsc =3D=3D 2) + num_rt_intf =3D topology.num_intf; + if (topology.cwb_enabled) + num_rt_intf--; + + if (topology.num_dsc) { + if (dpu_kms->catalog->dsc_count >=3D num_rt_intf * 2) + topology.num_dsc =3D num_rt_intf * 2; + else + topology.num_dsc =3D num_rt_intf; + topology.num_lm =3D topology.num_dsc; + } else if (num_rt_intf =3D=3D 2) { topology.num_lm =3D 2; - else if (dpu_kms->catalog->caps->has_3d_merge) + } else if (dpu_kms->catalog->caps->has_3d_merge) { topology.num_lm =3D (mode->hdisplay > MAX_HDISPLAY_SPLIT) ? 2 : 1; - else + } else { topology.num_lm =3D 1; + } =20 if (crtc_state->ctm) topology.num_dspp =3D topology.num_lm; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h b/drivers/gpu/drm/msm= /disp/dpu1/dpu_crtc.h index 6eaba5696e8e6bd1246a9895c4c8714ca6589b10..455073c7025b0bcb970d8817f19= 7d9bcacc6dca5 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h @@ -210,7 +210,7 @@ struct dpu_crtc_state { =20 bool bw_control; bool bw_split_vote; - struct drm_rect lm_bounds[CRTC_DUAL_MIXERS]; + struct drm_rect lm_bounds[CRTC_QUAD_MIXERS]; =20 uint64_t input_fence_timeout_ns; =20 @@ -218,10 +218,10 @@ struct dpu_crtc_state { =20 /* HW Resources reserved for the crtc */ u32 num_mixers; - struct dpu_crtc_mixer mixers[CRTC_DUAL_MIXERS]; + struct dpu_crtc_mixer mixers[CRTC_QUAD_MIXERS]; =20 u32 num_ctls; - struct dpu_hw_ctl *hw_ctls[CRTC_DUAL_MIXERS]; + struct dpu_hw_ctl *hw_ctls[CRTC_QUAD_MIXERS]; =20 enum dpu_crtc_crc_source crc_source; int crc_frame_skip_count; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/= msm/disp/dpu1/dpu_encoder.c index 4616b360812491afbe63f8ffd4a57bc9604382e7..d13eeb3a707e186faec67ec02a6= 34c14414d9048 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -55,7 +55,7 @@ #define MAX_PHYS_ENCODERS_PER_VIRTUAL \ (MAX_H_TILES_PER_DISPLAY * NUM_PHYS_ENCODER_TYPES) =20 -#define MAX_CHANNELS_PER_ENC 2 +#define MAX_CHANNELS_PER_ENC 4 #define MAX_CWB_PER_ENC 2 =20 #define IDLE_SHORT_TIMEOUT 1 @@ -675,22 +675,12 @@ void dpu_encoder_update_topology(struct drm_encoder *= drm_enc, =20 dsc =3D dpu_encoder_get_dsc_config(drm_enc); =20 - /* We only support 2 DSC mode (with 2 LM and 1 INTF) */ - if (dsc) { - /* - * Use 2 DSC encoders, 2 layer mixers and 1 or 2 interfaces - * when Display Stream Compression (DSC) is enabled, - * and when enough DSC blocks are available. - * This is power-optimal and can drive up to (including) 4k - * screens. - */ - WARN(topology->num_intf > 2, - "DSC topology cannot support more than 2 interfaces\n"); - if (topology->num_intf >=3D 2 || dpu_kms->catalog->dsc_count >=3D 2) - topology->num_dsc =3D 2; - else - topology->num_dsc =3D 1; - } + /* + * Set DSC number as 1 to mark the enabled status, will be adjusted + * in dpu_crtc_get_topology() + */ + if (dsc) + topology->num_dsc =3D 1; =20 connector =3D drm_atomic_get_new_connector_for_encoder(state, drm_enc); if (!connector) @@ -2179,8 +2169,8 @@ static void dpu_encoder_helper_reset_mixers(struct dp= u_encoder_phys *phys_enc) struct dpu_hw_mixer_cfg mixer; int i, num_lm; struct dpu_global_state *global_state; - struct dpu_hw_blk *hw_lm[2]; - struct dpu_hw_mixer *hw_mixer[2]; + struct dpu_hw_blk *hw_lm[MAX_CHANNELS_PER_ENC]; + struct dpu_hw_mixer *hw_mixer[MAX_CHANNELS_PER_ENC]; struct dpu_hw_ctl *ctl =3D phys_enc->hw_ctl; =20 memset(&mixer, 0, sizeof(mixer)); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu= /drm/msm/disp/dpu1/dpu_encoder_phys.h index 61b22d9494546885db609efa156222792af73d2a..09395d7910ac87c035b65cf4763= 50bf6c9619612 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h @@ -302,7 +302,7 @@ static inline enum dpu_3d_blend_mode dpu_encoder_helper= _get_3d_blend_mode( =20 /* Use merge_3d unless DSC MERGE topology is used */ if (phys_enc->split_role =3D=3D ENC_ROLE_SOLO && - dpu_cstate->num_mixers =3D=3D CRTC_DUAL_MIXERS && + (dpu_cstate->num_mixers !=3D 1) && !dpu_encoder_use_dsc_merge(phys_enc->parent)) return BLEND_3D_H_ROW_INT; =20 diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/d= rm/msm/disp/dpu1/dpu_hw_catalog.h index a78bb2c334e30bc86554bde45355808b790c6235..ce0265c13e050fbd48ac5c3202e= 8fa23edd1220d 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h @@ -24,7 +24,7 @@ #define DPU_MAX_IMG_WIDTH 0x3fff #define DPU_MAX_IMG_HEIGHT 0x3fff =20 -#define CRTC_DUAL_MIXERS 2 +#define CRTC_QUAD_MIXERS 4 =20 #define MAX_XIN_COUNT 16 =20 diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/= msm/disp/dpu1/dpu_hw_mdss.h index e4875a1f638db6f1983d9c51cb399319d27675e9..5cedcda285273a46cd6e11da63c= de92cab94b9f4 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h @@ -34,7 +34,7 @@ #define DPU_MAX_PLANES 4 #endif =20 -#define STAGES_PER_PLANE 1 +#define STAGES_PER_PLANE 2 #define PIPES_PER_STAGE 2 #define PIPES_PER_PLANE (PIPES_PER_STAGE * STAGES_PER_PLANE) #ifndef DPU_MAX_DE_CURVES --=20 2.34.1