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Lin" , Singo Chang , Nancy Lin , Shawn Sung , , Jason-jh Lin Subject: [PATCH 0/2] Change GCE hardware timeout to software timeout Date: Wed, 10 Jan 2024 23:51:46 +0800 Message-ID: <20240110155148.6383-1-jason-jh.lin@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--5.263700-8.000000 X-TMASE-MatchedRID: q3F3psOzl9ySm4maZcPB3bMjW/sniEQKKVrLOZD1BXT7efdnqtsaEwNx WPxQqGxCIivmPMAFRzSor0AhuwYJneHxFb2pjr4bXP5rFAucBUGy4iyjvVWTop2iHEDAUb20o8W MkQWv6iXBcIE78YqRWo6HM5rqDwqtgZFlHm/gtnY0ATtLIYswSE9/RQmUBCjZHpPDPfgQysA2V8 IOje1GckMMprcbiest X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--5.263700-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 6C97B50913820EDC4F53C26FD1119DCA9248F4935C41D9B043801622779BF2CB2000:8 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240110_080233_439380_BF38D6F8 X-CRM114-Status: UNSURE ( 9.70 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Jason-jh Lin Since the max value of GCE hardware interrupt timeout for wait and poll instructions is about 1760ms. It is not enough for the use case of ISP driver below: GCE Thread A: wait for SOF and set event 1. GCE Thread B: wait for event 1 and set event 2. GCE Thread C: wait for event 2 and set event 3. GCE Thread D: wait for event 3 and set event 4. GCE Thread E: wait for event 4 and set EOF. If all GCE Threads start at the same time, the latest GCE Thread E will wait for event more than 2 seconds. Therefore, we changed the hardware timeout to software timeout, making it longer, more certain, and making it configurable by CMDQ client drivers. Jason-JH.Lin (2): mailbox: mtk-cmdq: Change GCE hardware timeout to software timeout mailbox: mtk-cmdq: Add set GCE thread timeout interface drivers/mailbox/mtk-cmdq-mailbox.c | 183 +++++++++++++++++++++++ include/linux/mailbox/mtk-cmdq-mailbox.h | 4 + 2 files changed, 187 insertions(+)