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

[Inderpal Singh]

On 27 February 2013 02:52, Sylwester Nawrocki
<sylvester.nawrocki at 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 at 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 at linaro.org>
>     Tested-by: Chander Kashyap <chander.kashyap at linaro.org>
>     Signed-off-by: Vinod Koul <vinod.koul at linux.intel.com>
>
> commit faf6fbc6f2ca3b34bf464a8bb079a998e571957c
> Author: Inderpal Singh <inderpal.singh at 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 at linaro.org>
>     Tested-by: Chander Kashyap <chander.kashyap at linaro.org>
>     Signed-off-by: Vinod Koul <vinod.koul at 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.