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[34.125.3.185]) by smtp.gmail.com with UTF8SMTPSA id 98e67ed59e1d1-32ed2705f71sm475216a91.28.2025.09.16.14.08.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Sep 2025 14:08:34 -0700 (PDT) From: Chia-I Wu To: Boris Brezillon , Steven Price , Liviu Dudau , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Grant Likely , Heiko Stuebner , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org Subject: [PATCH 03/10] drm/panthor: add mmu_hw_cmd_unlock Date: Tue, 16 Sep 2025 14:08:16 -0700 Message-ID: <20250916210823.4033529-4-olvaffe@gmail.com> X-Mailer: git-send-email 2.51.0.384.g4c02a37b29-goog In-Reply-To: <20250916210823.4033529-1-olvaffe@gmail.com> References: <20250916210823.4033529-1-olvaffe@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a simple helper for the UNLOCK command. Signed-off-by: Chia-I Wu --- drivers/gpu/drm/panthor/panthor_mmu.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panthor/panthor_mmu.c b/drivers/gpu/drm/pantho= r/panthor_mmu.c index 8600d98842345..953348f9afdb8 100644 --- a/drivers/gpu/drm/panthor/panthor_mmu.c +++ b/drivers/gpu/drm/panthor/panthor_mmu.c @@ -588,6 +588,19 @@ static void mmu_hw_cmd_lock(struct panthor_device *ptd= ev, u32 as_nr, u64 region_ write_cmd(ptdev, as_nr, AS_COMMAND_LOCK); } =20 +/** + * mmu_hw_cmd_unlock() - Issue an UNLOCK command + * @ptdev: Device. + * @as_nr: AS to issue command to. + * + * Issue an UNLOCK command to unblock transactions for a locked region. The + * region is implied by the last mmu_hw_cmd_lock call. + */ +static void mmu_hw_cmd_unlock(struct panthor_device *ptdev, u32 as_nr) +{ + write_cmd(ptdev, as_nr, AS_COMMAND_UNLOCK); +} + static int mmu_hw_do_operation_locked(struct panthor_device *ptdev, int as= _nr, u64 iova, u64 size, u32 op) { @@ -633,7 +646,7 @@ static int mmu_hw_do_operation_locked(struct panthor_de= vice *ptdev, int as_nr, * at the end of the GPU_CONTROL cache flush command, unlike * AS_COMMAND_FLUSH_MEM or AS_COMMAND_FLUSH_PT. */ - write_cmd(ptdev, as_nr, AS_COMMAND_UNLOCK); + mmu_hw_cmd_unlock(ptdev, as_nr); =20 /* Wait for the unlock command to complete */ return mmu_hw_wait_ready(ptdev, as_nr); --=20 2.51.0.384.g4c02a37b29-goog