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author | Eugen Hristev <eugen.hristev@microchip.com> | 2021-09-13 13:22:54 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:29 +0300 |
commit | 43cfb5df9289e1334233d05f88d0f2d4b1750385 (patch) | |
tree | 15fc8053de327d33834bd0a882ab9be908698fa7 /drivers/media/platform | |
parent | ead5a141ea2237093c5290103d7953d93c3a859f (diff) | |
download | linux-43cfb5df9289e1334233d05f88d0f2d4b1750385.tar.xz |
media: atmel: fix the ispck initialization
[ Upstream commit d7f26849ed7cc875d0ff7480c2efebeeccea2bad ]
The runtime enabling of the ISPCK (internally clocks the pipeline inside
the ISC) has to be done after the pm_runtime for the ISC dev has been
started.
After the commit by Mauro:
the ISC failed to probe with the error:
atmel-sama5d2-isc f0008000.isc: failed to enable ispck: -13
atmel-sama5d2-isc: probe of f0008000.isc failed with error -13
This is because the enabling of the ispck is done too early in the probe,
and the PM runtime returns invalid request.
Thus, moved this clock enabling after pm_runtime_idle is called.
The ISPCK is required only for sama5d2 type of ISC.
Thus, add a bool inside the isc struct that is platform dependent.
For the sama7g5-isc, the enabling of the ISPCK is wrong and does not make
sense. Removed it from the sama7g5 probe. In sama7g5-isc, there is only
one clock, the MCK, which also clocks the internal pipeline of the ISC.
Adapted the clk_prepare and clk_unprepare to request the runtime PM
for both clocks (MCK and ISPCK) in case of sama5d2-isc, and the single
clock (MCK) in case of sama7g5-isc.
Fixes: dd97908ee350 ("media: atmel: properly get pm_runtime")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/media/platform')
-rw-r--r-- | drivers/media/platform/atmel/atmel-isc-base.c | 25 | ||||
-rw-r--r-- | drivers/media/platform/atmel/atmel-isc.h | 2 | ||||
-rw-r--r-- | drivers/media/platform/atmel/atmel-sama5d2-isc.c | 39 | ||||
-rw-r--r-- | drivers/media/platform/atmel/atmel-sama7g5-isc.c | 22 |
4 files changed, 38 insertions, 50 deletions
diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c index 136ab7cf36ed..ebf264b980f9 100644 --- a/drivers/media/platform/atmel/atmel-isc-base.c +++ b/drivers/media/platform/atmel/atmel-isc-base.c @@ -123,11 +123,9 @@ static int isc_clk_prepare(struct clk_hw *hw) struct isc_clk *isc_clk = to_isc_clk(hw); int ret; - if (isc_clk->id == ISC_ISPCK) { - ret = pm_runtime_resume_and_get(isc_clk->dev); - if (ret < 0) - return ret; - } + ret = pm_runtime_resume_and_get(isc_clk->dev); + if (ret < 0) + return ret; return isc_wait_clk_stable(hw); } @@ -138,8 +136,7 @@ static void isc_clk_unprepare(struct clk_hw *hw) isc_wait_clk_stable(hw); - if (isc_clk->id == ISC_ISPCK) - pm_runtime_put_sync(isc_clk->dev); + pm_runtime_put_sync(isc_clk->dev); } static int isc_clk_enable(struct clk_hw *hw) @@ -186,16 +183,13 @@ static int isc_clk_is_enabled(struct clk_hw *hw) u32 status; int ret; - if (isc_clk->id == ISC_ISPCK) { - ret = pm_runtime_resume_and_get(isc_clk->dev); - if (ret < 0) - return 0; - } + ret = pm_runtime_resume_and_get(isc_clk->dev); + if (ret < 0) + return 0; regmap_read(isc_clk->regmap, ISC_CLKSR, &status); - if (isc_clk->id == ISC_ISPCK) - pm_runtime_put_sync(isc_clk->dev); + pm_runtime_put_sync(isc_clk->dev); return status & ISC_CLK(isc_clk->id) ? 1 : 0; } @@ -325,6 +319,9 @@ static int isc_clk_register(struct isc_device *isc, unsigned int id) const char *parent_names[3]; int num_parents; + if (id == ISC_ISPCK && !isc->ispck_required) + return 0; + num_parents = of_clk_get_parent_count(np); if (num_parents < 1 || num_parents > 3) return -EINVAL; diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h index 19cc60dfcbe0..2bfcb135ef13 100644 --- a/drivers/media/platform/atmel/atmel-isc.h +++ b/drivers/media/platform/atmel/atmel-isc.h @@ -178,6 +178,7 @@ struct isc_reg_offsets { * @hclock: Hclock clock input (refer datasheet) * @ispck: iscpck clock (refer datasheet) * @isc_clks: ISC clocks + * @ispck_required: ISC requires ISP Clock initialization * @dcfg: DMA master configuration, architecture dependent * * @dev: Registered device driver @@ -252,6 +253,7 @@ struct isc_device { struct clk *hclock; struct clk *ispck; struct isc_clk isc_clks[2]; + bool ispck_required; u32 dcfg; struct device *dev; diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c index b66f1d174e9d..e29a9193bac8 100644 --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c @@ -454,6 +454,9 @@ static int atmel_isc_probe(struct platform_device *pdev) /* sama5d2-isc - 8 bits per beat */ isc->dcfg = ISC_DCFG_YMBSIZE_BEATS8 | ISC_DCFG_CMBSIZE_BEATS8; + /* sama5d2-isc : ISPCK is required and mandatory */ + isc->ispck_required = true; + ret = isc_pipeline_init(isc); if (ret) return ret; @@ -476,22 +479,6 @@ static int atmel_isc_probe(struct platform_device *pdev) dev_err(dev, "failed to init isc clock: %d\n", ret); goto unprepare_hclk; } - - isc->ispck = isc->isc_clks[ISC_ISPCK].clk; - - ret = clk_prepare_enable(isc->ispck); - if (ret) { - dev_err(dev, "failed to enable ispck: %d\n", ret); - goto unprepare_hclk; - } - - /* ispck should be greater or equal to hclock */ - ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); - if (ret) { - dev_err(dev, "failed to set ispck rate: %d\n", ret); - goto unprepare_clk; - } - ret = v4l2_device_register(dev, &isc->v4l2_dev); if (ret) { dev_err(dev, "unable to register v4l2 device.\n"); @@ -545,19 +532,35 @@ static int atmel_isc_probe(struct platform_device *pdev) pm_runtime_enable(dev); pm_request_idle(dev); + isc->ispck = isc->isc_clks[ISC_ISPCK].clk; + + ret = clk_prepare_enable(isc->ispck); + if (ret) { + dev_err(dev, "failed to enable ispck: %d\n", ret); + goto cleanup_subdev; + } + + /* ispck should be greater or equal to hclock */ + ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); + if (ret) { + dev_err(dev, "failed to set ispck rate: %d\n", ret); + goto unprepare_clk; + } + regmap_read(isc->regmap, ISC_VERSION + isc->offsets.version, &ver); dev_info(dev, "Microchip ISC version %x\n", ver); return 0; +unprepare_clk: + clk_disable_unprepare(isc->ispck); + cleanup_subdev: isc_subdev_cleanup(isc); unregister_v4l2_device: v4l2_device_unregister(&isc->v4l2_dev); -unprepare_clk: - clk_disable_unprepare(isc->ispck); unprepare_hclk: clk_disable_unprepare(isc->hclock); diff --git a/drivers/media/platform/atmel/atmel-sama7g5-isc.c b/drivers/media/platform/atmel/atmel-sama7g5-isc.c index f2785131ff56..9c05acafd072 100644 --- a/drivers/media/platform/atmel/atmel-sama7g5-isc.c +++ b/drivers/media/platform/atmel/atmel-sama7g5-isc.c @@ -447,6 +447,9 @@ static int microchip_xisc_probe(struct platform_device *pdev) /* sama7g5-isc RAM access port is full AXI4 - 32 bits per beat */ isc->dcfg = ISC_DCFG_YMBSIZE_BEATS32 | ISC_DCFG_CMBSIZE_BEATS32; + /* sama7g5-isc : ISPCK does not exist, ISC is clocked by MCK */ + isc->ispck_required = false; + ret = isc_pipeline_init(isc); if (ret) return ret; @@ -470,25 +473,10 @@ static int microchip_xisc_probe(struct platform_device *pdev) goto unprepare_hclk; } - isc->ispck = isc->isc_clks[ISC_ISPCK].clk; - - ret = clk_prepare_enable(isc->ispck); - if (ret) { - dev_err(dev, "failed to enable ispck: %d\n", ret); - goto unprepare_hclk; - } - - /* ispck should be greater or equal to hclock */ - ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); - if (ret) { - dev_err(dev, "failed to set ispck rate: %d\n", ret); - goto unprepare_clk; - } - ret = v4l2_device_register(dev, &isc->v4l2_dev); if (ret) { dev_err(dev, "unable to register v4l2 device.\n"); - goto unprepare_clk; + goto unprepare_hclk; } ret = xisc_parse_dt(dev, isc); @@ -549,8 +537,6 @@ cleanup_subdev: unregister_v4l2_device: v4l2_device_unregister(&isc->v4l2_dev); -unprepare_clk: - clk_disable_unprepare(isc->ispck); unprepare_hclk: clk_disable_unprepare(isc->hclock); |