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SMDKV210 support issue in kernel 3.8 (dma-pl330 and HDMI failed)

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Commit Message

Sylwester Nawrocki Feb. 26, 2013, 9:22 p.m. UTC
On 02/22/2013 01:00 PM, Lonsn wrote:
> Hi,
> I have tested the kernel 3.8 with a SMDKV210 like board. But I failed
> with dma-pl330 and HDMI driver.
> For dma-pl330, kernel print:
> dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
> dma-pl330: probe of dma-pl330.0 failed with error -22
> dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
> dma-pl330: probe of dma-pl330.1 failed with error -22

Maybe there is some issue with the PL330 DMA controller clocks and the
read values are all 0 because the clocks are disabled ?

It seems arch/arm/mach-s5pv210/clock.c might be missing "apb_pclk" clock
supply names, which I suspect may be required after commits:

commit 7c71b8eb268ee38235f7e924d943ea9d90e59469
Author: Inderpal Singh <inderpal.singh@linaro.org>
Date:   Fri Sep 7 12:14:48 2012 +0530

     DMA: PL330: Remove redundant runtime_suspend/resume functions

     The driver's  runtime_suspend/resume functions just disable/enable
     the clock which is already being managed at AMBA bus level
     runtime_suspend/resume functions.

     Hence, remove the driver's runtime_suspend/resume functions.

     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
Author: Inderpal Singh <inderpal.singh@linaro.org>
Date:   Fri Sep 7 12:14:47 2012 +0530

     DMA: PL330: Remove controller clock enable/disable

     The controller clock is being enabled/disabled in AMBA bus
     infrastructre in probe/remove functions. Hence, its not required
     at driver level probe/remove.

     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>

I have added people who made related changes at Cc, hopefully they
can provide some help in debugging this.

Please try the following change:

8<--------------------
8<--------------------

If it works then we could make some cleaner patch.

> For HDMI driver,
> I have added the following HDMI related code to
> arch/arm/mach-s5pv210/mach-smdkv210.c:
> /* I2C module and id for HDMIPHY */
> static struct i2c_board_info hdmiphy_info = {
> I2C_BOARD_INFO("hdmiphy-s5pv210", 0x38),
> };
>
> i2c_register_board_info(2, smdkv210_i2c_devs2,
> ARRAY_SIZE(smdkv210_i2c_devs2));
>
> s5p_i2c_hdmiphy_set_platdata(NULL);
> s5p_hdmi_set_platdata(&hdmiphy_info, NULL, 0);
>
> s3c_ide_set_platdata(&smdkv210_ide_pdata);
>
> then kernel print:
> s5p-hdmi s5pv210-hdmi: hdmiphy adapter request failed
> s5p-hdmi s5pv210-hdmi: probe failed
> Samsung TV Mixer driver, (c) 2010-2011 Samsung Electronics Co., Ltd.
>
> s5p-mixer s5p-mixer: probe start
> s5p-mixer s5p-mixer: resources acquired
> s5p-mixer s5p-mixer: module s5p-hdmi provides no subdev!
> s5p-mixer s5p-mixer: module s5p-sdo provides no subdev!
> s5p-mixer s5p-mixer: failed to register any output
> s5p-mixer s5p-mixer: probe failed
>
> Can anybody help me on how to config the HDMI output function in linux
> kernel 3.8? I mainly want to do video hardware decode using s5pv210 MFC
> and then display with HDMI.

For video playback (video post-processing) you might also need at least one
FIMC device. Please refer to arch/arm/mach-goni.c for an example on how to
add related devices to your board. You don't need the camera stuff, just 
add:

	&s5p_device_mfc,
	&s5p_device_mfc_l,
	&s5p_device_mfc_r,

	&s5p_device_fimc0,
	&s5p_device_fimc1,
	&s5p_device_fimc2,
	&s5p_device_fimc_md,

to smdkv210_devices[] and related Kconfig entries to make it compile.
You'll need a function similar to goni_reserve() in your board file
to reserve memory for the video codec.

Hope that helps.
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Comments

Inderpal Singh Feb. 27, 2013, 10:51 a.m. UTC | #1
On 27 February 2013 02:52, Sylwester Nawrocki
<sylvester.nawrocki@gmail.com> wrote:
> On 02/22/2013 01:00 PM, Lonsn wrote:
>>
>> Hi,
>> I have tested the kernel 3.8 with a SMDKV210 like board. But I failed
>> with dma-pl330 and HDMI driver.
>> For dma-pl330, kernel print:
>> dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
>> dma-pl330: probe of dma-pl330.0 failed with error -22
>> dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
>> dma-pl330: probe of dma-pl330.1 failed with error -22
>
>
> Maybe there is some issue with the PL330 DMA controller clocks and the
> read values are all 0 because the clocks are disabled ?
>
> It seems arch/arm/mach-s5pv210/clock.c might be missing "apb_pclk" clock
> supply names, which I suspect may be required after commits:
>
> commit 7c71b8eb268ee38235f7e924d943ea9d90e59469
> Author: Inderpal Singh <inderpal.singh@linaro.org>
> Date:   Fri Sep 7 12:14:48 2012 +0530
>
>     DMA: PL330: Remove redundant runtime_suspend/resume functions
>
>     The driver's  runtime_suspend/resume functions just disable/enable
>     the clock which is already being managed at AMBA bus level
>     runtime_suspend/resume functions.
>
>     Hence, remove the driver's runtime_suspend/resume functions.
>
>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>
> commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
> Author: Inderpal Singh <inderpal.singh@linaro.org>
> Date:   Fri Sep 7 12:14:47 2012 +0530
>
>     DMA: PL330: Remove controller clock enable/disable
>
>     The controller clock is being enabled/disabled in AMBA bus
>     infrastructre in probe/remove functions. Hence, its not required
>     at driver level probe/remove.
>
>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>
> I have added people who made related changes at Cc, hopefully they
> can provide some help in debugging this.
>

The mentioned patches just removed the redundant clock enable/disable
from the driver as clock is already being managed at amba bus level in
the same code path. As per my understanding the issue should come even
without these patches.

@Lonsn: Can you please test without these patches?

Thanks,
Inder

> Please try the following change:
>
> 8<--------------------
> diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
> index fcdf52d..87c7d3f 100644
> --- a/arch/arm/mach-s5pv210/clock.c
> +++ b/arch/arm/mach-s5pv210/clock.c
> @@ -214,11 +214,6 @@ static struct clk clk_pcmcdclk2 = {
>         .name           = "pcmcdclk",
>  };
>
> -static struct clk dummy_apb_pclk = {
> -       .name           = "apb_pclk",
> -       .id             = -1,
> -};
> -
>  static struct clk *clkset_vpllsrc_list[] = {
>         [0] = &clk_fin_vpll,
>         [1] = &clk_sclk_hdmi27m,
> @@ -1333,6 +1328,8 @@ static struct clk_lookup s5pv210_clk_lookup[] = {
>         CLKDEV_INIT(NULL, "spi_busclk0", &clk_p),
>         CLKDEV_INIT("s5pv210-spi.0", "spi_busclk1", &clk_sclk_spi0.clk),
>         CLKDEV_INIT("s5pv210-spi.1", "spi_busclk1", &clk_sclk_spi1.clk),
> +       CLKDEV_INIT("dma-pl330.0", "apb_pclk", &init_clocks_off[0]),
> +       CLKDEV_INIT("dma-pl330.1", "apb_pclk", &init_clocks_off[1]),
>  };
>
>  void __init s5pv210_register_clocks(void)
> @@ -1361,6 +1358,5 @@ void __init s5pv210_register_clocks(void)
>         for (ptr = 0; ptr < ARRAY_SIZE(clk_cdev); ptr++)
>                 s3c_disable_clocks(clk_cdev[ptr], 1);
>
> -       s3c24xx_register_clock(&dummy_apb_pclk);
>         s3c_pwmclk_init();
>  }
> 8<--------------------
>
> If it works then we could make some cleaner patch.
>
>
>> For HDMI driver,
>> I have added the following HDMI related code to
>> arch/arm/mach-s5pv210/mach-smdkv210.c:
>> /* I2C module and id for HDMIPHY */
>> static struct i2c_board_info hdmiphy_info = {
>> I2C_BOARD_INFO("hdmiphy-s5pv210", 0x38),
>> };
>>
>> i2c_register_board_info(2, smdkv210_i2c_devs2,
>> ARRAY_SIZE(smdkv210_i2c_devs2));
>>
>> s5p_i2c_hdmiphy_set_platdata(NULL);
>> s5p_hdmi_set_platdata(&hdmiphy_info, NULL, 0);
>>
>> s3c_ide_set_platdata(&smdkv210_ide_pdata);
>>
>> then kernel print:
>> s5p-hdmi s5pv210-hdmi: hdmiphy adapter request failed
>> s5p-hdmi s5pv210-hdmi: probe failed
>> Samsung TV Mixer driver, (c) 2010-2011 Samsung Electronics Co., Ltd.
>>
>> s5p-mixer s5p-mixer: probe start
>> s5p-mixer s5p-mixer: resources acquired
>> s5p-mixer s5p-mixer: module s5p-hdmi provides no subdev!
>> s5p-mixer s5p-mixer: module s5p-sdo provides no subdev!
>> s5p-mixer s5p-mixer: failed to register any output
>> s5p-mixer s5p-mixer: probe failed
>>
>> Can anybody help me on how to config the HDMI output function in linux
>> kernel 3.8? I mainly want to do video hardware decode using s5pv210 MFC
>> and then display with HDMI.
>
>
> For video playback (video post-processing) you might also need at least one
> FIMC device. Please refer to arch/arm/mach-goni.c for an example on how to
> add related devices to your board. You don't need the camera stuff, just
> add:
>
>         &s5p_device_mfc,
>         &s5p_device_mfc_l,
>         &s5p_device_mfc_r,
>
>         &s5p_device_fimc0,
>         &s5p_device_fimc1,
>         &s5p_device_fimc2,
>         &s5p_device_fimc_md,
>
> to smdkv210_devices[] and related Kconfig entries to make it compile.
> You'll need a function similar to goni_reserve() in your board file
> to reserve memory for the video codec.
>
> Hope that helps.
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Sylwester Nawrocki Feb. 27, 2013, 11:22 a.m. UTC | #2
On 02/27/2013 11:51 AM, Inderpal Singh wrote:
> On 27 February 2013 02:52, Sylwester Nawrocki
> <sylvester.nawrocki@gmail.com> wrote:
>> On 02/22/2013 01:00 PM, Lonsn wrote:
>>>
>>> Hi,
>>> I have tested the kernel 3.8 with a SMDKV210 like board. But I failed
>>> with dma-pl330 and HDMI driver.
>>> For dma-pl330, kernel print:
>>> dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>> dma-pl330: probe of dma-pl330.0 failed with error -22
>>> dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>> dma-pl330: probe of dma-pl330.1 failed with error -22
>>
>>
>> Maybe there is some issue with the PL330 DMA controller clocks and the
>> read values are all 0 because the clocks are disabled ?
>>
>> It seems arch/arm/mach-s5pv210/clock.c might be missing "apb_pclk" clock
>> supply names, which I suspect may be required after commits:
>>
>> commit 7c71b8eb268ee38235f7e924d943ea9d90e59469
>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>> Date:   Fri Sep 7 12:14:48 2012 +0530
>>
>>     DMA: PL330: Remove redundant runtime_suspend/resume functions
>>
>>     The driver's  runtime_suspend/resume functions just disable/enable
>>     the clock which is already being managed at AMBA bus level
>>     runtime_suspend/resume functions.
>>
>>     Hence, remove the driver's runtime_suspend/resume functions.
>>
>>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>
>> commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>> Date:   Fri Sep 7 12:14:47 2012 +0530
>>
>>     DMA: PL330: Remove controller clock enable/disable
>>
>>     The controller clock is being enabled/disabled in AMBA bus
>>     infrastructre in probe/remove functions. Hence, its not required
>>     at driver level probe/remove.
>>
>>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>
>> I have added people who made related changes at Cc, hopefully they
>> can provide some help in debugging this.
>>
> 
> The mentioned patches just removed the redundant clock enable/disable
> from the driver as clock is already being managed at amba bus level in
> the same code path. As per my understanding the issue should come even
> without these patches.

But were the clocks managed directly by the pl330 driver same as those
managed at amba bus level ? The first patch as above removed chunk

@@ -2887,24 +2884,17 @@ pl330_probe(struct amba_device *adev, const struct
amba_id *id)
                goto probe_err1;
        }

-       pdmac->clk = clk_get(&adev->dev, "dma");
-       if (IS_ERR(pdmac->clk)) {
-               dev_err(&adev->dev, "Cannot get operation clock.\n");
-               ret = -EINVAL;
-               goto probe_err2;
-       }
-

which suggest the driver was enabling directly "dma" clocks, defined at
S5PV210 platform level as:

        {
                .name           = "dma",
                .devname        = "dma-pl330.0",
                .parent         = &clk_hclk_psys.clk,
                .enable         = s5pv210_clk_ip0_ctrl,
                .ctrlbit        = (1 << 3),
        }, {
                .name           = "dma",
                .devname        = "dma-pl330.1",
                .parent         = &clk_hclk_psys.clk,
                .enable         = s5pv210_clk_ip0_ctrl,
                .ctrlbit        = (1 << 4),
        }, {

And amba bus was getting only dummy clocks behind "apb_pclk" clock
conn_id.

> @Lonsn: Can you please test without these patches?

I suspect reverting only patch
DMA: PL330: Remove redundant runtime_suspend/resume functions
with PM_RUNTIME enabled might fix the issue.

--

Regards,
Sylwester
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Lonsn Feb. 27, 2013, 3:22 p.m. UTC | #3
? 2013/2/27 18:51, Inderpal Singh ??:
> On 27 February 2013 02:52, Sylwester Nawrocki
> <sylvester.nawrocki@gmail.com> wrote:
>> On 02/22/2013 01:00 PM, Lonsn wrote:
>>>
>>> Hi,
>>> I have tested the kernel 3.8 with a SMDKV210 like board. But I failed
>>> with dma-pl330 and HDMI driver.
>>> For dma-pl330, kernel print:
>>> dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>> dma-pl330: probe of dma-pl330.0 failed with error -22
>>> dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>> dma-pl330: probe of dma-pl330.1 failed with error -22
>>
>>
>> Maybe there is some issue with the PL330 DMA controller clocks and the
>> read values are all 0 because the clocks are disabled ?
>>
>> It seems arch/arm/mach-s5pv210/clock.c might be missing "apb_pclk" clock
>> supply names, which I suspect may be required after commits:
>>
>> commit 7c71b8eb268ee38235f7e924d943ea9d90e59469
>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>> Date:   Fri Sep 7 12:14:48 2012 +0530
>>
>>      DMA: PL330: Remove redundant runtime_suspend/resume functions
>>
>>      The driver's  runtime_suspend/resume functions just disable/enable
>>      the clock which is already being managed at AMBA bus level
>>      runtime_suspend/resume functions.
>>
>>      Hence, remove the driver's runtime_suspend/resume functions.
>>
>>      Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>      Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>      Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>
>> commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>> Date:   Fri Sep 7 12:14:47 2012 +0530
>>
>>      DMA: PL330: Remove controller clock enable/disable
>>
>>      The controller clock is being enabled/disabled in AMBA bus
>>      infrastructre in probe/remove functions. Hence, its not required
>>      at driver level probe/remove.
>>
>>      Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>      Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>      Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>
>> I have added people who made related changes at Cc, hopefully they
>> can provide some help in debugging this.
>>
>
> The mentioned patches just removed the redundant clock enable/disable
> from the driver as clock is already being managed at amba bus level in
> the same code path. As per my understanding the issue should come even
> without these patches.
>
> @Lonsn: Can you please test without these patches?

Inder, I have made the DMA clock change according to Sylwester's 
suggetstions and it works!
Now kernel prints:
------------------------------------>
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
s3c-fb s5pv210-fb: window 0: fb
dma-pl330 dma-pl330.0: Loaded driver for PL330 DMAC-267056
dma-pl330 dma-pl330.0:  DBUFF-8x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
dma-pl330 dma-pl330.1: Loaded driver for PL330 DMAC-267056
dma-pl330 dma-pl330.1:  DBUFF-8x4bytes Num_Chans-8 Num_Peri-32 Num_Events-32
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
s5pv210-uart.0: ttySAC0 at MMIO 0xe2900000 (irq = 74) is a S3C6400/10
------------------------------------------>
>
> Thanks,
> Inder
>
>> Please try the following change:
>>
>> 8<--------------------
>> diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
>> index fcdf52d..87c7d3f 100644
>> --- a/arch/arm/mach-s5pv210/clock.c
>> +++ b/arch/arm/mach-s5pv210/clock.c
>> @@ -214,11 +214,6 @@ static struct clk clk_pcmcdclk2 = {
>>          .name           = "pcmcdclk",
>>   };
>>
>> -static struct clk dummy_apb_pclk = {
>> -       .name           = "apb_pclk",
>> -       .id             = -1,
>> -};
>> -
>>   static struct clk *clkset_vpllsrc_list[] = {
>>          [0] = &clk_fin_vpll,
>>          [1] = &clk_sclk_hdmi27m,
>> @@ -1333,6 +1328,8 @@ static struct clk_lookup s5pv210_clk_lookup[] = {
>>          CLKDEV_INIT(NULL, "spi_busclk0", &clk_p),
>>          CLKDEV_INIT("s5pv210-spi.0", "spi_busclk1", &clk_sclk_spi0.clk),
>>          CLKDEV_INIT("s5pv210-spi.1", "spi_busclk1", &clk_sclk_spi1.clk),
>> +       CLKDEV_INIT("dma-pl330.0", "apb_pclk", &init_clocks_off[0]),
>> +       CLKDEV_INIT("dma-pl330.1", "apb_pclk", &init_clocks_off[1]),
>>   };
>>
>>   void __init s5pv210_register_clocks(void)
>> @@ -1361,6 +1358,5 @@ void __init s5pv210_register_clocks(void)
>>          for (ptr = 0; ptr < ARRAY_SIZE(clk_cdev); ptr++)
>>                  s3c_disable_clocks(clk_cdev[ptr], 1);
>>
>> -       s3c24xx_register_clock(&dummy_apb_pclk);
>>          s3c_pwmclk_init();
>>   }
>> 8<--------------------
>>
>> If it works then we could make some cleaner patch.
>>
>>
>>> For HDMI driver,
>>> I have added the following HDMI related code to
>>> arch/arm/mach-s5pv210/mach-smdkv210.c:
>>> /* I2C module and id for HDMIPHY */
>>> static struct i2c_board_info hdmiphy_info = {
>>> I2C_BOARD_INFO("hdmiphy-s5pv210", 0x38),
>>> };
>>>
>>> i2c_register_board_info(2, smdkv210_i2c_devs2,
>>> ARRAY_SIZE(smdkv210_i2c_devs2));
>>>
>>> s5p_i2c_hdmiphy_set_platdata(NULL);
>>> s5p_hdmi_set_platdata(&hdmiphy_info, NULL, 0);
>>>
>>> s3c_ide_set_platdata(&smdkv210_ide_pdata);
>>>
>>> then kernel print:
>>> s5p-hdmi s5pv210-hdmi: hdmiphy adapter request failed
>>> s5p-hdmi s5pv210-hdmi: probe failed
>>> Samsung TV Mixer driver, (c) 2010-2011 Samsung Electronics Co., Ltd.
>>>
>>> s5p-mixer s5p-mixer: probe start
>>> s5p-mixer s5p-mixer: resources acquired
>>> s5p-mixer s5p-mixer: module s5p-hdmi provides no subdev!
>>> s5p-mixer s5p-mixer: module s5p-sdo provides no subdev!
>>> s5p-mixer s5p-mixer: failed to register any output
>>> s5p-mixer s5p-mixer: probe failed
>>>
>>> Can anybody help me on how to config the HDMI output function in linux
>>> kernel 3.8? I mainly want to do video hardware decode using s5pv210 MFC
>>> and then display with HDMI.
>>
>>
>> For video playback (video post-processing) you might also need at least one
>> FIMC device. Please refer to arch/arm/mach-goni.c for an example on how to
>> add related devices to your board. You don't need the camera stuff, just
>> add:
>>
>>          &s5p_device_mfc,
>>          &s5p_device_mfc_l,
>>          &s5p_device_mfc_r,
>>
>>          &s5p_device_fimc0,
>>          &s5p_device_fimc1,
>>          &s5p_device_fimc2,
>>          &s5p_device_fimc_md,
>>
>> to smdkv210_devices[] and related Kconfig entries to make it compile.
>> You'll need a function similar to goni_reserve() in your board file
>> to reserve memory for the video codec.
>>
>> Hope that helps.
Yes, I have added fimc0,fimc1,fimc2,fimc_md and reserve MFC memory. But 
currently HDMI output doesn't work correctly yet, I would try to see the 
HDMI output first and then video decoder.
Regards,


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Inderpal Singh Feb. 27, 2013, 3:32 p.m. UTC | #4
On 27 February 2013 16:52, Sylwester Nawrocki <s.nawrocki@samsung.com> wrote:
> On 02/27/2013 11:51 AM, Inderpal Singh wrote:
>> On 27 February 2013 02:52, Sylwester Nawrocki
>> <sylvester.nawrocki@gmail.com> wrote:
>>> On 02/22/2013 01:00 PM, Lonsn wrote:
>>>>
>>>> Hi,
>>>> I have tested the kernel 3.8 with a SMDKV210 like board. But I failed
>>>> with dma-pl330 and HDMI driver.
>>>> For dma-pl330, kernel print:
>>>> dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>>> dma-pl330: probe of dma-pl330.0 failed with error -22
>>>> dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
>>>> dma-pl330: probe of dma-pl330.1 failed with error -22
>>>
>>>
>>> Maybe there is some issue with the PL330 DMA controller clocks and the
>>> read values are all 0 because the clocks are disabled ?
>>>
>>> It seems arch/arm/mach-s5pv210/clock.c might be missing "apb_pclk" clock
>>> supply names, which I suspect may be required after commits:
>>>
>>> commit 7c71b8eb268ee38235f7e924d943ea9d90e59469
>>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>>> Date:   Fri Sep 7 12:14:48 2012 +0530
>>>
>>>     DMA: PL330: Remove redundant runtime_suspend/resume functions
>>>
>>>     The driver's  runtime_suspend/resume functions just disable/enable
>>>     the clock which is already being managed at AMBA bus level
>>>     runtime_suspend/resume functions.
>>>
>>>     Hence, remove the driver's runtime_suspend/resume functions.
>>>
>>>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>>
>>> commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
>>> Author: Inderpal Singh <inderpal.singh@linaro.org>
>>> Date:   Fri Sep 7 12:14:47 2012 +0530
>>>
>>>     DMA: PL330: Remove controller clock enable/disable
>>>
>>>     The controller clock is being enabled/disabled in AMBA bus
>>>     infrastructre in probe/remove functions. Hence, its not required
>>>     at driver level probe/remove.
>>>
>>>     Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
>>>     Tested-by: Chander Kashyap <chander.kashyap@linaro.org>
>>>     Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
>>>
>>> I have added people who made related changes at Cc, hopefully they
>>> can provide some help in debugging this.
>>>
>>
>> The mentioned patches just removed the redundant clock enable/disable
>> from the driver as clock is already being managed at amba bus level in
>> the same code path. As per my understanding the issue should come even
>> without these patches.
>
> But were the clocks managed directly by the pl330 driver same as those
> managed at amba bus level ? The first patch as above removed chunk
>
> @@ -2887,24 +2884,17 @@ pl330_probe(struct amba_device *adev, const struct
> amba_id *id)
>                 goto probe_err1;
>         }
>
> -       pdmac->clk = clk_get(&adev->dev, "dma");
> -       if (IS_ERR(pdmac->clk)) {
> -               dev_err(&adev->dev, "Cannot get operation clock.\n");
> -               ret = -EINVAL;
> -               goto probe_err2;
> -       }
> -
>
> which suggest the driver was enabling directly "dma" clocks, defined at
> S5PV210 platform level as:
>
>         {
>                 .name           = "dma",
>                 .devname        = "dma-pl330.0",
>                 .parent         = &clk_hclk_psys.clk,
>                 .enable         = s5pv210_clk_ip0_ctrl,
>                 .ctrlbit        = (1 << 3),
>         }, {
>                 .name           = "dma",
>                 .devname        = "dma-pl330.1",
>                 .parent         = &clk_hclk_psys.clk,
>                 .enable         = s5pv210_clk_ip0_ctrl,
>                 .ctrlbit        = (1 << 4),
>         }, {
>
> And amba bus was getting only dummy clocks behind "apb_pclk" clock
> conn_id.
>

Ahh Yes, I had missed this point. So the changes you suggested needs
to be done as confirmed by Lonsn.

Thanks Lonsn for bringing this up :-)

Regards,
Inder

>> @Lonsn: Can you please test without these patches?
>
> I suspect reverting only patch
> DMA: PL330: Remove redundant runtime_suspend/resume functions
> with PM_RUNTIME enabled might fix the issue.
>
> --
>
> Regards,
> Sylwester
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diff mbox

Patch

diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
index fcdf52d..87c7d3f 100644
--- a/arch/arm/mach-s5pv210/clock.c
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -214,11 +214,6 @@  static struct clk clk_pcmcdclk2 = {
         .name           = "pcmcdclk",
  };

-static struct clk dummy_apb_pclk = {
-       .name           = "apb_pclk",
-       .id             = -1,
-};
-
  static struct clk *clkset_vpllsrc_list[] = {
         [0] = &clk_fin_vpll,
         [1] = &clk_sclk_hdmi27m,
@@ -1333,6 +1328,8 @@  static struct clk_lookup s5pv210_clk_lookup[] = {
         CLKDEV_INIT(NULL, "spi_busclk0", &clk_p),
         CLKDEV_INIT("s5pv210-spi.0", "spi_busclk1", &clk_sclk_spi0.clk),
         CLKDEV_INIT("s5pv210-spi.1", "spi_busclk1", &clk_sclk_spi1.clk),
+       CLKDEV_INIT("dma-pl330.0", "apb_pclk", &init_clocks_off[0]),
+       CLKDEV_INIT("dma-pl330.1", "apb_pclk", &init_clocks_off[1]),
  };

  void __init s5pv210_register_clocks(void)
@@ -1361,6 +1358,5 @@  void __init s5pv210_register_clocks(void)
         for (ptr = 0; ptr < ARRAY_SIZE(clk_cdev); ptr++)
                 s3c_disable_clocks(clk_cdev[ptr], 1);

-       s3c24xx_register_clock(&dummy_apb_pclk);
         s3c_pwmclk_init();
  }