From: Maxime Ripard <maxime@cerno.tech>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Eric Anholt <eric@anholt.net>
Cc: dri-devel@lists.freedesktop.org,
linux-rpi-kernel@lists.infradead.org,
bcm-kernel-feedback-list@broadcom.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
Tim Gover <tim.gover@raspberrypi.com>,
Phil Elwell <phil@raspberrypi.com>,
Maxime Ripard <maxime@cerno.tech>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>, Rob Herring <robh+dt@kernel.org>,
linux-clk@vger.kernel.org, devicetree@vger.kernel.org
Subject: [PATCH 27/89] clk: bcm: Add BCM2711 DVP driver
Date: Mon, 24 Feb 2020 10:06:29 +0100 [thread overview]
Message-ID: <6dd6bd48e894c1e8ee85c29a30ba1b18041d83c4.1582533919.git-series.maxime@cerno.tech> (raw)
In-Reply-To: <cover.6c896ace9a5a7840e9cec008b553cbb004ca1f91.1582533919.git-series.maxime@cerno.tech>
The HDMI block has a block that controls clocks and reset signals to the
HDMI0 and HDMI1 controllers.
Let's expose that through a clock driver implementing a clock and reset
provider.
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-clk@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/clk/bcm/Kconfig | 1 +-
drivers/clk/bcm/Makefile | 1 +-
drivers/clk/bcm/clk-bcm2711-dvp.c | 113 +++++++++++++++++++++++++++++++-
3 files changed, 115 insertions(+)
create mode 100644 drivers/clk/bcm/clk-bcm2711-dvp.c
diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
index 8c83977a7dc4..03bbd8040451 100644
--- a/drivers/clk/bcm/Kconfig
+++ b/drivers/clk/bcm/Kconfig
@@ -4,6 +4,7 @@ config CLK_BCM2835
depends on ARCH_BCM2835 || ARCH_BRCMSTB || COMPILE_TEST
depends on COMMON_CLK
default ARCH_BCM2835 || ARCH_BRCMSTB
+ select RESET_SIMPLE
help
Enable common clock framework support for Broadcom BCM2835
SoCs.
diff --git a/drivers/clk/bcm/Makefile b/drivers/clk/bcm/Makefile
index 0070ddf6cdd2..2c1349062147 100644
--- a/drivers/clk/bcm/Makefile
+++ b/drivers/clk/bcm/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_CLK_BCM_KONA) += clk-kona-setup.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm281xx.o
obj-$(CONFIG_CLK_BCM_KONA) += clk-bcm21664.o
obj-$(CONFIG_COMMON_CLK_IPROC) += clk-iproc-armpll.o clk-iproc-pll.o clk-iproc-asiu.o
+obj-$(CONFIG_CLK_BCM2835) += clk-bcm2711-dvp.o
obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835.o
obj-$(CONFIG_CLK_BCM2835) += clk-bcm2835-aux.o
obj-$(CONFIG_CLK_RASPBERRYPI) += clk-raspberrypi.o
diff --git a/drivers/clk/bcm/clk-bcm2711-dvp.c b/drivers/clk/bcm/clk-bcm2711-dvp.c
new file mode 100644
index 000000000000..f4773cc92724
--- /dev/null
+++ b/drivers/clk/bcm/clk-bcm2711-dvp.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Copyright 2020 Cerno
+
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/reset/reset-simple.h>
+
+#define DVP_HT_RPI_SW_INIT 0x04
+#define DVP_HT_RPI_MISC_CONFIG 0x08
+
+#define NR_CLOCKS 2
+#define NR_RESETS 6
+
+struct clk_dvp {
+ struct clk *clks[NR_CLOCKS];
+ struct clk_onecell_data clk_data;
+ struct reset_simple_data reset;
+};
+
+static int clk_dvp_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct clk_dvp *dvp;
+ void __iomem *base;
+ const char *parent;
+ int ret;
+
+ dvp = devm_kzalloc(&pdev->dev, sizeof(*dvp), GFP_KERNEL);
+ if (!dvp)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, dvp);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ dvp->reset.rcdev.owner = THIS_MODULE;
+ dvp->reset.rcdev.nr_resets = NR_RESETS;
+ dvp->reset.rcdev.ops = &reset_simple_ops;
+ dvp->reset.rcdev.of_node = pdev->dev.of_node;
+ dvp->reset.membase = base + DVP_HT_RPI_SW_INIT;
+ spin_lock_init(&dvp->reset.lock);
+
+ ret = reset_controller_register(&dvp->reset.rcdev);
+ if (ret)
+ return ret;
+
+ parent = of_clk_get_parent_name(pdev->dev.of_node, 0);
+ if (!parent)
+ goto unregister_reset;
+
+ dvp->clks[0] = clk_register_gate(&pdev->dev, "hdmi0-108MHz",
+ parent, CLK_IS_CRITICAL,
+ base + DVP_HT_RPI_MISC_CONFIG, 3,
+ CLK_GATE_SET_TO_DISABLE, &dvp->reset.lock);
+ if (IS_ERR(dvp->clks[0])) {
+ ret = PTR_ERR(dvp->clks[0]);
+ goto unregister_reset;
+ }
+
+ dvp->clks[1] = clk_register_gate(&pdev->dev, "hdmi1-108MHz",
+ parent, CLK_IS_CRITICAL,
+ base + DVP_HT_RPI_MISC_CONFIG, 4,
+ CLK_GATE_SET_TO_DISABLE, &dvp->reset.lock);
+ if (IS_ERR(dvp->clks[1])) {
+ ret = PTR_ERR(dvp->clks[1]);
+ goto unregister_clk0;
+ }
+
+ dvp->clk_data.clks = dvp->clks;
+ dvp->clk_data.clk_num = NR_CLOCKS;
+ of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get,
+ &dvp->clk_data);
+
+ return 0;
+
+
+unregister_clk0:
+ clk_unregister_gate(dvp->clks[0]);
+
+unregister_reset:
+ reset_controller_unregister(&dvp->reset.rcdev);
+ return ret;
+};
+
+static int clk_dvp_remove(struct platform_device *pdev)
+{
+ struct clk_dvp *dvp = platform_get_drvdata(pdev);
+
+ clk_unregister_gate(dvp->clks[1]);
+ clk_unregister_gate(dvp->clks[0]);
+ reset_controller_unregister(&dvp->reset.rcdev);
+
+ return 0;
+}
+
+static const struct of_device_id clk_dvp_dt_ids[] = {
+ { .compatible = "brcm,brcm2711-dvp", },
+ { /* sentinel */ },
+};
+
+static struct platform_driver clk_dvp_driver = {
+ .probe = clk_dvp_probe,
+ .remove = clk_dvp_remove,
+ .driver = {
+ .name = "brcm2711-dvp",
+ .of_match_table = clk_dvp_dt_ids,
+ },
+};
+module_platform_driver(clk_dvp_driver);
--
git-series 0.9.1
next prev parent reply other threads:[~2020-02-24 9:13 UTC|newest]
Thread overview: 161+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 9:06 [PATCH 00/89] drm/vc4: Support BCM2711 Display Pipeline Maxime Ripard
2020-02-24 9:06 ` [PATCH 01/89] dt-bindings: i2c: brcmstb: Convert the BRCMSTB binding to a schema Maxime Ripard
2020-02-24 17:40 ` Florian Fainelli
2020-02-25 18:14 ` Rob Herring
2020-03-10 10:07 ` Wolfram Sang
2020-03-10 10:07 ` Wolfram Sang
2020-02-24 9:06 ` [PATCH 02/89] dt-bindings: i2c: brcmstb: Add BCM2711 BSC/AUTO-I2C binding Maxime Ripard
2020-02-24 17:48 ` Florian Fainelli
2020-02-25 18:15 ` Rob Herring
2020-03-10 10:07 ` Wolfram Sang
2020-02-24 9:06 ` [PATCH 03/89] i2c: brcmstb: Support BCM2711 HDMI BSC controllers Maxime Ripard
2020-02-24 17:44 ` Florian Fainelli
2020-03-10 10:12 ` Wolfram Sang
2020-02-24 9:06 ` [PATCH 04/89] i2c: brcmstb: Allow to compile it on BCM2835 Maxime Ripard
2020-02-24 17:39 ` Florian Fainelli
2020-03-10 10:16 ` Wolfram Sang
2020-02-24 9:06 ` [PATCH 05/89] clk: Return error code when of provider pointer is NULL Maxime Ripard
2020-03-12 23:13 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 06/89] dt-bindings: clock: Add a binding for the RPi Firmware clocks Maxime Ripard
2020-02-25 18:16 ` Rob Herring
2020-03-12 23:14 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 07/89] clk: bcm: rpi: Allow the driver to be probed by DT Maxime Ripard
2020-02-25 16:00 ` Nicolas Saenz Julienne
2020-02-26 15:01 ` Maxime Ripard
2020-02-28 19:57 ` Nicolas Saenz Julienne
2020-03-01 12:16 ` Stefan Wahren
2020-03-23 15:13 ` Maxime Ripard
2020-02-24 9:06 ` [PATCH 08/89] clk: bcm: rpi: Statically init clk_init_data Maxime Ripard
2020-02-25 16:05 ` Nicolas Saenz Julienne
2020-02-24 9:06 ` [PATCH 09/89] clk: bcm: rpi: Use clk_hw_register for pllb_arm Maxime Ripard
2020-02-25 16:11 ` Nicolas Saenz Julienne
2020-03-12 23:17 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 10/89] clk: bcm: rpi: Remove global pllb_arm clock pointer Maxime Ripard
2020-02-25 16:13 ` Nicolas Saenz Julienne
2020-02-26 14:26 ` Maxime Ripard
2020-02-26 14:57 ` Nicolas Saenz Julienne
2020-02-24 9:06 ` [PATCH 11/89] clk: bcm: rpi: Make sure pllb_arm is removed Maxime Ripard
2020-02-25 16:14 ` Nicolas Saenz Julienne
2020-03-12 23:20 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 12/89] clk: bcm: rpi: Remove pllb_arm_lookup global pointer Maxime Ripard
2020-02-25 16:16 ` Nicolas Saenz Julienne
2020-03-12 23:21 ` Stephen Boyd
2020-03-13 1:13 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 13/89] clk: bcm: rpi: Switch to clk_hw_register_clkdev Maxime Ripard
2020-02-25 16:17 ` Nicolas Saenz Julienne
2020-03-13 1:12 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 14/89] clk: bcm: rpi: Make sure the clkdev lookup is removed Maxime Ripard
2020-02-25 16:19 ` Nicolas Saenz Julienne
2020-03-13 1:11 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 15/89] clk: bcm: rpi: Create a data structure for the clocks Maxime Ripard
2020-02-25 16:24 ` Nicolas Saenz Julienne
2020-03-13 1:11 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 16/89] clk: bcm: rpi: Add clock id to data Maxime Ripard
2020-02-24 19:25 ` Stefan Wahren
2020-02-25 9:54 ` Maxime Ripard
2020-02-25 14:33 ` Nicolas Saenz Julienne
2020-02-25 16:24 ` Nicolas Saenz Julienne
2020-03-13 1:11 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 17/89] clk: bcm: rpi: Pass the clocks data to the firmware function Maxime Ripard
2020-02-25 16:26 ` Nicolas Saenz Julienne
2020-03-13 1:09 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 18/89] clk: bcm: rpi: Rename is_prepared function Maxime Ripard
2020-02-25 16:45 ` Nicolas Saenz Julienne
2020-03-13 1:09 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 19/89] clk: bcm: rpi: Split pllb clock hooks Maxime Ripard
2020-03-13 1:08 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 20/89] clk: bcm: rpi: Make the PLLB registration function return a clk_hw Maxime Ripard
2020-03-13 1:01 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 21/89] clk: bcm: rpi: Add DT provider for the clocks Maxime Ripard
2020-03-13 1:01 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 22/89] clk: bcm: rpi: Discover the firmware clocks Maxime Ripard
2020-02-24 16:47 ` kbuild test robot
2020-02-24 16:47 ` [PATCH] clk: bcm: rpi: fix noderef.cocci warnings kbuild test robot
2020-02-24 18:15 ` [PATCH 22/89] clk: bcm: rpi: Discover the firmware clocks Florian Fainelli
2020-02-26 14:15 ` Maxime Ripard
2020-02-24 20:24 ` kbuild test robot
2020-03-13 1:08 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 23/89] ARM: dts: bcm2711: Add firmware clocks node Maxime Ripard
2020-02-24 9:06 ` [PATCH 24/89] reset: Move reset-simple header out of drivers/reset Maxime Ripard
2020-02-24 9:06 ` [PATCH 25/89] reset: simple: Add reset callback Maxime Ripard
2020-03-04 12:03 ` Philipp Zabel
2020-02-24 9:06 ` [PATCH 26/89] dt-bindings: clock: Add BCM2711 DVP binding Maxime Ripard
2020-02-25 18:17 ` Rob Herring
2020-02-24 9:06 ` Maxime Ripard [this message]
2020-03-13 1:00 ` [PATCH 27/89] clk: bcm: Add BCM2711 DVP driver Stephen Boyd
2020-03-23 10:56 ` Maxime Ripard
2020-03-25 2:20 ` Stephen Boyd
2020-02-24 9:06 ` [PATCH 28/89] ARM: dts: bcm2711: Add HDMI DVP Maxime Ripard
2020-02-24 9:06 ` [PATCH 29/89] dt-bindings: display: Convert VC4 bindings to schemas Maxime Ripard
2020-02-24 18:41 ` Rob Herring
2020-02-25 11:54 ` Maxime Ripard
2020-02-25 14:02 ` Rob Herring
2020-02-24 9:06 ` [PATCH 30/89] dt-bindings: display: vc4: dpi: Add missing clock-names property Maxime Ripard
2020-02-25 18:17 ` Rob Herring
2020-02-24 9:06 ` [PATCH 31/89] dt-bindings: display: vc4: dsi: Add missing clock properties Maxime Ripard
2020-02-25 18:18 ` Rob Herring
2020-02-24 9:06 ` [PATCH 32/89] dt-bindings: display: vc4: hdmi: Add missing clock-names property Maxime Ripard
2020-02-25 18:18 ` Rob Herring
2020-02-24 9:06 ` [PATCH 33/89] dt-bindings: display: vc4: Document BCM2711 VC5 Maxime Ripard
2020-02-25 18:18 ` Rob Herring
2020-02-24 9:06 ` [PATCH 34/89] drm/vc4: drv: Add include guards Maxime Ripard
2020-02-24 9:06 ` [PATCH 35/89] drm/vc4: drv: Support BCM2711 Maxime Ripard
2020-02-24 9:06 ` [PATCH 36/89] drm/vc4: drv: Add support for the BCM2711 HVS5 Maxime Ripard
2020-02-24 9:06 ` [PATCH 37/89] drm/vc4: plane: Improve LBM usage Maxime Ripard
2020-02-24 9:06 ` [PATCH 38/89] drm/vc4: plane: Move planes creation to its own function Maxime Ripard
2020-02-24 9:06 ` [PATCH 39/89] drm/vc4: plane: Move additional planes creation to driver Maxime Ripard
2020-02-24 9:06 ` [PATCH 40/89] drm/vc4: plane: Register all the planes at once Maxime Ripard
2020-02-24 9:06 ` [PATCH 41/89] drm/vc4: plane: Create overlays for any CRTC Maxime Ripard
2020-02-24 9:06 ` [PATCH 42/89] drm/vc4: plane: Create more planes Maxime Ripard
2020-02-24 9:06 ` [PATCH 43/89] drm/vc4: crtc: Rename SoC data structures Maxime Ripard
2020-02-24 9:06 ` [PATCH 44/89] drm/vc4: crtc: Move crtc state to common header Maxime Ripard
2020-02-24 9:06 ` [PATCH 45/89] drm/vc4: crtc: Deal with different number of pixel per clock Maxime Ripard
2020-02-24 9:06 ` [PATCH 46/89] drm/vc4: crtc: Use a shared interrupt Maxime Ripard
2020-02-24 9:06 ` [PATCH 47/89] drm/vc4: crtc: Turn static const variable into a define Maxime Ripard
2020-02-24 9:06 ` [PATCH 48/89] drm/vc4: crtc: Move the cob allocation outside of bind Maxime Ripard
2020-02-24 9:06 ` [PATCH 49/89] drm/vc4: crtc: Rename HVS channel to output Maxime Ripard
2020-02-24 9:06 ` [PATCH 50/89] drm/vc4: crtc: Use local chan variable Maxime Ripard
2020-02-24 9:06 ` [PATCH 51/89] drm/vc4: crtc: Enable and disable the PV in atomic_enable / disable Maxime Ripard
2020-02-24 9:06 ` [PATCH 52/89] drm/vc4: crtc: Assign output to channel automatically Maxime Ripard
2020-02-24 9:06 ` [PATCH 53/89] drm/vc4: crtc: Add FIFO depth to vc4_crtc_data Maxime Ripard
2020-02-24 9:06 ` [PATCH 54/89] drm/vc4: crtc: Add function to compute FIFO level bits Maxime Ripard
2020-02-24 9:06 ` [PATCH 55/89] drm/vc4: crtc: Rename HDMI encoder type to HDMI0 Maxime Ripard
2020-02-24 9:06 ` [PATCH 56/89] drm/vc4: crtc: Add HDMI1 encoder type Maxime Ripard
2020-02-24 9:06 ` [PATCH 57/89] drm/vc4: crtc: Remove redundant call to drm_crtc_enable_color_mgmt Maxime Ripard
2020-02-24 9:07 ` [PATCH 58/89] drm/vc4: crtc: Disable color management for HVS5 Maxime Ripard
2020-02-24 9:07 ` [PATCH 59/89] dt-bindings: display: vc4: pv: Add BCM2711 pixel valves Maxime Ripard
2020-02-25 18:19 ` Rob Herring
2020-02-24 9:07 ` [PATCH 60/89] drm/vc4: crtc: Add BCM2711 pixelvalves Maxime Ripard
2020-02-24 9:07 ` [PATCH 61/89] drm/vc4: hdmi: Use debugfs private field Maxime Ripard
2020-02-24 9:07 ` [PATCH 62/89] drm/vc4: hdmi: Move structure to header Maxime Ripard
2020-02-24 9:07 ` [PATCH 63/89] drm/vc4: hdmi: rework connectors and encoders Maxime Ripard
2020-02-24 9:07 ` [PATCH 64/89] drm/vc4: hdmi: Remove DDC argument to connector_init Maxime Ripard
2020-02-24 9:07 ` [PATCH 65/89] drm/vc4: hdmi: Rename hdmi to vc4_hdmi Maxime Ripard
2020-02-24 9:07 ` [PATCH 66/89] drm/vc4: hdmi: Move accessors " Maxime Ripard
2020-02-24 9:07 ` [PATCH 67/89] drm/vc4: hdmi: Use local vc4_hdmi directly Maxime Ripard
2020-02-24 9:07 ` [PATCH 68/89] drm/vc4: hdmi: Add container_of macros for encoders and connectors Maxime Ripard
2020-02-24 9:07 ` [PATCH 69/89] drm/vc4: hdmi: Pass vc4_hdmi to CEC code Maxime Ripard
2020-02-24 9:07 ` [PATCH 70/89] drm/vc4: hdmi: Remove vc4_dev hdmi pointer Maxime Ripard
2020-02-24 9:07 ` [PATCH 71/89] drm/vc4: hdmi: Remove vc4_hdmi_connector Maxime Ripard
2020-02-24 9:07 ` [PATCH 72/89] drm/vc4: hdmi: Introduce resource init and variant Maxime Ripard
2020-02-24 9:07 ` [PATCH 73/89] drm/vc4: hdmi: Implement a register layout abstraction Maxime Ripard
2020-02-24 9:07 ` [PATCH 74/89] drm/vc4: hdmi: Add reset callback Maxime Ripard
2020-02-24 9:07 ` [PATCH 75/89] drm/vc4: hdmi: Add PHY init and disable function Maxime Ripard
2020-02-24 9:07 ` [PATCH 76/89] drm/vc4: hdmi: Add PHY RNG enable / " Maxime Ripard
2020-02-24 9:07 ` [PATCH 77/89] drm/vc4: hdmi: Add a CSC setup callback Maxime Ripard
2020-02-24 9:07 ` [PATCH 78/89] drm/vc4: hdmi: Add a set_timings callback Maxime Ripard
2020-02-24 9:07 ` [PATCH 79/89] drm/vc4: hdmi: Add HDMI ID Maxime Ripard
2020-02-24 9:07 ` [PATCH 80/89] drm/vc4: hdmi: Deal with multiple debugfs files Maxime Ripard
2020-02-24 9:07 ` [PATCH 81/89] drm/vc4: hdmi: Add an audio support flag Maxime Ripard
2020-02-24 9:07 ` [PATCH 82/89] drm/vc4: hdmi: Move CEC init to its own function Maxime Ripard
2020-02-24 9:07 ` [PATCH 83/89] drm/vc4: hdmi: Add CEC support flag Maxime Ripard
2020-02-24 9:07 ` [PATCH 84/89] drm/vc4: hdmi: Remove unused CEC_CLOCK_DIV define Maxime Ripard
2020-02-24 9:07 ` [PATCH 85/89] drm/vc4: hdmi: Rename drm_encoder pointer in mode_valid Maxime Ripard
2020-02-24 9:07 ` [PATCH 86/89] drm/vc4: hdmi: Adjust HSM clock rate depending on pixel rate Maxime Ripard
2020-03-16 12:54 ` Nicolas Saenz Julienne
2020-02-24 9:07 ` [PATCH 87/89] drm/vc4: hdmi: Support the BCM2711 HDMI controllers Maxime Ripard
2020-03-17 18:25 ` Daniel Rodriguez
2020-02-24 9:07 ` [PATCH 88/89] dt-bindings: display: vc4: hdmi: Add BCM2711 HDMI controllers bindings Maxime Ripard
2020-02-25 18:24 ` Rob Herring
2020-02-24 9:07 ` [PATCH 89/89] ARM: dts: bcm2711: Enable the display pipeline Maxime Ripard
2020-03-05 10:00 ` [PATCH 70/89] drm/vc4: hdmi: Remove vc4_dev hdmi pointer Jian-Hong Pan
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