Hi philipp,
On 2015å¹´03æ12æ¥ 18:29, Philipp Zabel wrote:
> Am Samstag, den 28.02.2015, 21:35 -0500 schrieb Yakir Yang:
>> By parsing the identification registers we can know what functions
>> are present on the hdmi ip.
>>
>> Signed-off-by: Yakir Yang <ykk at rock-chips.com>
>> ---
>> Changes in v4:
>> -Correct phy_type assignment bug
>>
>> Changes in v3:
>> - Add ID registers parse and record
>>
>> Changes in v2: None
>>
>> drivers/gpu/drm/bridge/dw_hdmi.c | 59
>> ++++++++++++++++++++++++++++++++++++++++
>> drivers/gpu/drm/bridge/dw_hdmi.h | 23 ++++++++++++++++
>> 2 files changed, 82 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c
>> b/drivers/gpu/drm/bridge/dw_hdmi.c
>> index 08f10da..937beed 100644
>> --- a/drivers/gpu/drm/bridge/dw_hdmi.c
>> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c
>> @@ -79,6 +79,23 @@ static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
>> { 0x6756, 0x78ab, 0x2000, 0x0200 }
>> };
>>
>> +struct hdmi_id {
>> + u8 design;
>> + u8 revision;
>> +
>> + bool prepen;
>> + bool audspdif;
>> + bool audi2s;
>> + bool hdmi14;
>> + bool csc;
>> + bool hdcp;
>> + bool hdmi20;
>> + bool confapb;
>> + bool ahbauddma;
>> + bool gpaud;
>> + u8 phy_type;
>> +};
>>
>> struct hdmi_vmode {
>> bool mdvi;
>> bool mhsyncpolarity;
>> @@ -111,6 +128,8 @@ struct dw_hdmi {
>> struct clk *isfr_clk;
>> struct clk *iahb_clk;
>>
>> + struct hdmi_id id;
>> +
>> struct hdmi_data_info hdmi_data;
>> const struct dw_hdmi_plat_data *plat_data;
>>
>> @@ -1259,6 +1278,36 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct
>> drm_display_mode *mode)
>> return 0;
>> }
>>
>> +static void hdmi_parse_id(struct dw_hdmi *hdmi)
>> +{
>> + u8 config0_id, config1_id, config2_id, config3_id;
>> +
>> + config0_id = hdmi_readb(hdmi, HDMI_CONFIG0_ID);
>> + config1_id = hdmi_readb(hdmi, HDMI_CONFIG1_ID);
>> + config2_id = hdmi_readb(hdmi, HDMI_CONFIG2_ID);
>> + config3_id = hdmi_readb(hdmi, HDMI_CONFIG3_ID);
>> +
>> + hdmi->id.prepen = config0_id & HDMI_CONFIG0_ID_PREPEN ? true : false;
>> + hdmi->id.audi2s = config0_id & HDMI_CONFIG0_ID_AUDI2S ? true : false;
>> + hdmi->id.hdmi14 = config0_id & HDMI_CONFIG0_ID_HDMI14 ? true : false;
>> + hdmi->id.hdcp = config0_id & HDMI_CONFIG0_ID_HDCP ? true : false;
>> + hdmi->id.csc = config0_id & HDMI_CONFIG0_ID_CSC ? true : false;
>> + hdmi->id.audspdif = config0_id & HDMI_CONFIG0_ID_AUDSPDIF ?
>> + true : false;
>> +
>> + hdmi->id.confapb = config1_id & HDMI_CONFIG1_ID_CONFAPB ? true : false;
>> + hdmi->id.hdmi20 = config1_id & HDMI_CONFIG1_ID_HDMI20 ? true : false;
>> +
>> + hdmi->id.phy_type = config2_id;
>> +
>> + hdmi->id.gpaud = config3_id & HDMI_CONFIG3_ID_GPAUD ? true : false;
>> + hdmi->id.ahbauddma = config3_id & HDMI_CONFIG3_ID_AHBAUDDMA ?
>> + true : false;
>> +
>> + hdmi->id.design = hdmi_readb(hdmi, HDMI_DESIGN_ID);
>> + hdmi->id.revision = hdmi_readb(hdmi, HDMI_REVISION_ID);
>> +}
> What is the purpose of creating a copy of all the feature bits? As far
> as I can tell you are only ever using hdmi_id.design afterwards.
Yeah, you are right. Seems hdmi audio have long long way to go.
As for now, we just need hdmi_id.design to separate registers.
Agree, I will simplify it in next verison.
>
>
> regards
> Philipp
regards :)
Yakir
>
>
>
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