diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch b/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch deleted file mode 100644 index 7fd337edb8..0000000000 --- a/target/linux/bcm27xx/patches-5.10/950-0294-media-bcm2835-unicam-Set-VPU-min-clock-freq-to-250Mh.patch +++ /dev/null @@ -1,127 +0,0 @@ -From d839c8936020f393c5536d83b783198217243e8d Mon Sep 17 00:00:00 2001 -From: Naushir Patuck <naush@raspberrypi.com> -Date: Mon, 11 May 2020 13:02:22 +0100 -Subject: [PATCH] media: bcm2835: unicam: Set VPU min clock freq to - 250Mhz. - -When streaming with Unicam, the VPU must have a clock frequency of at -least 250Mhz. Otherwise, the input fifos could overrun, causing -image corruption. - -Signed-off-by: Naushir Patuck <naush@raspberrypi.com> ---- - .../media/platform/bcm2835/bcm2835-unicam.c | 49 +++++++++++++++++-- - 1 file changed, 44 insertions(+), 5 deletions(-) - ---- a/drivers/media/platform/bcm2835/bcm2835-unicam.c -+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c -@@ -89,6 +89,11 @@ MODULE_PARM_DESC(debug, "Debug level 0-3 - v4l2_err(&(dev)->v4l2_dev, fmt, ##arg) - - /* -+ * Unicam must request a minimum of 250Mhz from the VPU clock. -+ * Otherwise the input FIFOs overrun and cause image corruption. -+ */ -+#define MIN_VPU_CLOCK_RATE (250 * 1000 * 1000) -+/* - * To protect against a dodgy sensor driver never returning an error from - * enum_mbus_code, set a maximum index value to be used. - */ -@@ -417,8 +422,10 @@ struct unicam_device { - void __iomem *base; - /* clock gating base address */ - void __iomem *clk_gate_base; -- /* clock handle */ -+ /* lp clock handle */ - struct clk *clock; -+ /* vpu clock handle */ -+ struct clk *vpu_clock; - /* V4l2 device */ - struct v4l2_device v4l2_dev; - struct media_device mdev; -@@ -1678,16 +1685,28 @@ static int unicam_start_streaming(struct - unicam_dbg(1, dev, "Running with %u data lanes\n", - dev->active_data_lanes); - -- ret = clk_set_rate(dev->clock, 100 * 1000 * 1000); -+ ret = clk_set_min_rate(dev->vpu_clock, MIN_VPU_CLOCK_RATE); -+ if (ret) { -+ unicam_err(dev, "failed to set up VPU clock\n"); -+ goto err_pm_put; -+ } -+ -+ ret = clk_prepare_enable(dev->vpu_clock); - if (ret) { -- unicam_err(dev, "failed to set up clock\n"); -+ unicam_err(dev, "Failed to enable VPU clock: %d\n", ret); - goto err_pm_put; - } - -+ ret = clk_set_rate(dev->clock, 100 * 1000 * 1000); -+ if (ret) { -+ unicam_err(dev, "failed to set up CSI clock\n"); -+ goto err_vpu_clock; -+ } -+ - ret = clk_prepare_enable(dev->clock); - if (ret) { - unicam_err(dev, "Failed to enable CSI clock: %d\n", ret); -- goto err_pm_put; -+ goto err_vpu_clock; - } - - for (i = 0; i < ARRAY_SIZE(dev->node); i++) { -@@ -1721,6 +1740,11 @@ static int unicam_start_streaming(struct - err_disable_unicam: - unicam_disable(dev); - clk_disable_unprepare(dev->clock); -+err_vpu_clock: -+ ret = clk_set_min_rate(dev->vpu_clock, 0); -+ if (ret) -+ unicam_err(dev, "failed to reset the VPU clock\n"); -+ clk_disable_unprepare(dev->vpu_clock); - err_pm_put: - unicam_runtime_put(dev); - err_streaming: -@@ -1738,6 +1762,8 @@ static void unicam_stop_streaming(struct - node->streaming = false; - - if (node->pad_id == IMAGE_PAD) { -+ int ret; -+ - /* - * Stop streaming the sensor and disable the peripheral. - * We cannot continue streaming embedded data with the -@@ -1747,6 +1773,12 @@ static void unicam_stop_streaming(struct - unicam_err(dev, "stream off failed in subdev\n"); - - unicam_disable(dev); -+ -+ ret = clk_set_min_rate(dev->vpu_clock, 0); -+ if (ret) -+ unicam_err(dev, "failed to reset the min VPU clock\n"); -+ -+ clk_disable_unprepare(dev->vpu_clock); - clk_disable_unprepare(dev->clock); - unicam_runtime_put(dev); - -@@ -2750,11 +2782,18 @@ static int unicam_probe(struct platform_ - - unicam->clock = devm_clk_get(&pdev->dev, "lp"); - if (IS_ERR(unicam->clock)) { -- unicam_err(unicam, "Failed to get clock\n"); -+ unicam_err(unicam, "Failed to get lp clock\n"); - ret = PTR_ERR(unicam->clock); - goto err_unicam_put; - } - -+ unicam->vpu_clock = devm_clk_get(&pdev->dev, "vpu"); -+ if (IS_ERR(unicam->vpu_clock)) { -+ unicam_err(unicam, "Failed to get vpu clock\n"); -+ ret = PTR_ERR(unicam->vpu_clock); -+ goto err_unicam_put; -+ } -+ - ret = platform_get_irq(pdev, 0); - if (ret <= 0) { - dev_err(&pdev->dev, "No IRQ resource\n"); |