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[2001:14ba:a00e:a300:264b:feff:fe8b:be8a]) by smtp.gmail.com with ESMTPSA id u19-20020a2e8553000000b002d11ef66881sm713092ljj.91.2024.02.25.18.28.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 25 Feb 2024 18:28:02 -0800 (PST) From: Dmitry Baryshkov Date: Mon, 26 Feb 2024 04:28:01 +0200 Subject: [PATCH v4 3/3] drm/msm/dpu: capture snapshot on the first commit_done timeout Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240226-fd-dpu-debug-timeout-v4-3-51eec83dde23@linaro.org> References: <20240226-fd-dpu-debug-timeout-v4-0-51eec83dde23@linaro.org> In-Reply-To: <20240226-fd-dpu-debug-timeout-v4-0-51eec83dde23@linaro.org> To: Rob Clark , Abhinav Kumar , Sean Paul , Marijn Suijten , David Airlie , Daniel Vetter Cc: Steev Klimaszewski , linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2187; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=DcJkg8xY9yU1wn7LtAuvfIPSDQOSJ+nJ+ORj2FrKvhg=; b=owGbwMvMwMXYbdNlx6SpcZXxtFoSQ+rt7/oaDYu8RNoPts+ZddbZcfsC6eypMzb3mR1w/7Pvs Ilev7RRJ6MxCwMjF4OsmCKLT0HL1JhNyWEfdkythxnEygQyhYGLUwAmskaV/X9y3YNSk7+/8w1W 3k3ge/RaK+Z1dUKrak9sw5z6AGvZsu/veVIYS0tnyPGsbQn9zFe81oF9y6/pC7fZWCwTXvHs6rM zk5jm23h+cVgTUdrp31ac26J6r51n0/sJd02dqiT+Jrbxz7yRo7nPJHO/1dar+kt+C9VtOzi7Mj qfOXd9opRLvIurnZTjktlim/Vapp2+uidq7uZb1fH3L2vwbgrq0X5YNrO1faLI3c5yw3u73vF2B HS5C/pJvS8xvFB9tuY5a8fz+D/fnXy07AOWeIrcq0vltRLXNzvNHz3BstBPz8j1r+FLh4bU+jvl SeGT7P/sl/ZdLuj6anHp6fO3QhWrhXZE+sbvmRBv6GEGAA== X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791926777394194398 X-GMAIL-MSGID: 1791926777394194398 In order to debug commit_done timeouts, capture the devcoredump state when the first timeout occurs after the encoder has been enabled. Reviewed-by: Abhinav Kumar Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index c99c7fd770f6..c45edcde7ebc 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -126,6 +126,8 @@ enum dpu_enc_rc_states { * @base: drm_encoder base class for registration with DRM * @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes * @enabled: True if the encoder is active, protected by enc_lock + * @commit_done_timedout: True if there has been a timeout on commit after + * enabling the encoder. * @num_phys_encs: Actual number of physical encoders contained. * @phys_encs: Container of physical encoders managed. * @cur_master: Pointer to the current master in this mode. Optimization @@ -172,6 +174,7 @@ struct dpu_encoder_virt { spinlock_t enc_spinlock; bool enabled; + bool commit_done_timedout; unsigned int num_phys_encs; struct dpu_encoder_phys *phys_encs[MAX_PHYS_ENCODERS_PER_VIRTUAL]; @@ -1226,6 +1229,8 @@ static void dpu_encoder_virt_atomic_enable(struct drm_encoder *drm_enc, else if (disp_info->intf_type == INTF_DSI) dpu_enc->wide_bus_en = msm_dsi_wide_bus_enabled(priv->dsi[index]); + dpu_enc->commit_done_timedout = false; + mutex_lock(&dpu_enc->enc_lock); cur_mode = &dpu_enc->base.crtc->state->adjusted_mode; @@ -2431,6 +2436,10 @@ int dpu_encoder_wait_for_commit_done(struct drm_encoder *drm_enc) DPU_ATRACE_BEGIN("wait_for_commit_done"); ret = phys->ops.wait_for_commit_done(phys); DPU_ATRACE_END("wait_for_commit_done"); + if (ret == -ETIMEDOUT && !dpu_enc->commit_done_timedout) { + dpu_enc->commit_done_timedout = true; + msm_disp_snapshot_state(drm_enc->dev); + } if (ret) return ret; }