2016년 11월 07일 17:05에 Andrzej Hajda 이(가) 쓴 글:
> On 07.11.2016 02:45, Inki Dae wrote:
>>
>> 2016년 10월 26일 21:36에 Andrzej Hajda 이(가) 쓴 글:
>>> Use core helpers to generate infoframes and generate vendor frame if necessary.
>>>
>>> Signed-off-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
>>> ---
>>> drivers/gpu/drm/exynos/exynos_hdmi.c | 141 ++++++++++-------------------------
>>> drivers/gpu/drm/exynos/regs-hdmi.h | 2 +
>>> 2 files changed, 42 insertions(+), 101 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
>>> index e8fb6ef..1bb2df7 100644
>>> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
>>> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
>>> @@ -47,19 +47,6 @@
>>>
>>> #define HOTPLUG_DEBOUNCE_MS 1100
>>>
>>> -/* AVI header and aspect ratio */
>>> -#define HDMI_AVI_VERSION 0x02
>>> -#define HDMI_AVI_LENGTH 0x0d
>>> -
>>> -/* AUI header info */
>>> -#define HDMI_AUI_VERSION 0x01
>>> -#define HDMI_AUI_LENGTH 0x0a
>>> -
>>> -/* AVI active format aspect ratio */
>>> -#define AVI_SAME_AS_PIC_ASPECT_RATIO 0x08
>>> -#define AVI_4_3_CENTER_RATIO 0x09
>>> -#define AVI_16_9_CENTER_RATIO 0x0a
>>> -
>>> enum hdmi_type {
>>> HDMI_TYPE13,
>>> HDMI_TYPE14,
>>> @@ -131,7 +118,6 @@ struct hdmi_context {
>>> bool dvi_mode;
>>> struct delayed_work hotplug_work;
>>> struct drm_display_mode current_mode;
>>> - u8 cea_video_id;
>>> const struct hdmi_driver_data *drv_data;
>>>
>>> void __iomem *regs;
>>> @@ -681,6 +667,13 @@ static inline void hdmi_reg_writev(struct hdmi_context *hdata, u32 reg_id,
>>> }
>>> }
>>>
>>> +static inline void hdmi_reg_write_buf(struct hdmi_context *hdata, u32 reg_id,
>>> + u8 *buf, int size)
>>> +{
>>> + for (reg_id = hdmi_map_reg(hdata, reg_id); size; --size, reg_id += 4)
>>> + writel(*buf++, hdata->regs + reg_id);
>>> +}
>>> +
>>> static inline void hdmi_reg_writemask(struct hdmi_context *hdata,
>>> u32 reg_id, u32 value, u32 mask)
>>> {
>>> @@ -762,93 +755,50 @@ static int hdmi_clk_set_parents(struct hdmi_context *hdata, bool to_phy)
>>> return ret;
>>> }
>>>
>>> -static u8 hdmi_chksum(struct hdmi_context *hdata,
>>> - u32 start, u8 len, u32 hdr_sum)
>>> -{
>>> - int i;
>>> -
>>> - /* hdr_sum : header0 + header1 + header2
>>> - * start : start address of packet byte1
>>> - * len : packet bytes - 1 */
>>> - for (i = 0; i < len; ++i)
>>> - hdr_sum += 0xff & hdmi_reg_read(hdata, start + i * 4);
>>> -
>>> - /* return 2's complement of 8 bit hdr_sum */
>>> - return (u8)(~(hdr_sum & 0xff) + 1);
>>> -}
>>> -
>>> -static void hdmi_reg_infoframe(struct hdmi_context *hdata,
>>> - union hdmi_infoframe *infoframe)
>>> +static void hdmi_reg_infoframes(struct hdmi_context *hdata)
>>> {
>>> - u32 hdr_sum;
>>> - u8 chksum;
>>> - u8 ar;
>>> + union hdmi_infoframe frm;
>>> + u8 buf[25];
>>> + int ret;
>>>
>>> if (hdata->dvi_mode) {
>>> - hdmi_reg_writeb(hdata, HDMI_VSI_CON,
>>> - HDMI_VSI_CON_DO_NOT_TRANSMIT);
>>> hdmi_reg_writeb(hdata, HDMI_AVI_CON,
>>> HDMI_AVI_CON_DO_NOT_TRANSMIT);
>>> + hdmi_reg_writeb(hdata, HDMI_VSI_CON,
>>> + HDMI_VSI_CON_DO_NOT_TRANSMIT);
>>> hdmi_reg_writeb(hdata, HDMI_AUI_CON, HDMI_AUI_CON_NO_TRAN);
>>> return;
>>> }
>>>
>>> - switch (infoframe->any.type) {
>>> - case HDMI_INFOFRAME_TYPE_AVI:
>>> + ret = drm_hdmi_avi_infoframe_from_display_mode(&frm.avi,
>>> + &hdata->current_mode);
>>> + if (ret >= 0)
>> Seems above condition is not clear becuase drm_hdmi_avi_infoframe_from_display_mode function returns 0 or negative value.
>
> So it means 'there is no error', I can change it to '!ret' or 'ret == 0'
> if you prefer, I have just used '>= 0' to be more concise with next
> error check.
As I mentioned, never return bigger than 0. Let's change it to !ret or ret == 0.
>>
>>> + ret = hdmi_avi_infoframe_pack(&frm.avi, buf, sizeof(buf));
>>> + if (ret > 0) {
>>> hdmi_reg_writeb(hdata, HDMI_AVI_CON, HDMI_AVI_CON_EVERY_VSYNC);
>> I think above code should be called when drm_hdmi_avi_infoframe_from_display_mode function returned 0 and the value from hdmi_avi_infoframe_pack function is more than 1.
>
> Why do you think 'more than 1' is better than 'more than 0' in this
> case? hdmi_avi_infoframe_pack returns length of generated frame or
> negative value in case of error,
> so any positive value is OK, there is no special meaning for '1'.
Because hdmi_avi_infoframe_pack returns 0 or bigger than 0. Anyway, seems you are saying exactly same thing.
>
>>
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_HEADER0, infoframe->any.type);
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_HEADER1,
>>> - infoframe->any.version);
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_HEADER2, infoframe->any.length);
>>> - hdr_sum = infoframe->any.type + infoframe->any.version +
>>> - infoframe->any.length;
>>> -
>>> - /* Output format zero hardcoded ,RGB YBCR selection */
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(1), 0 << 5 |
>>> - AVI_ACTIVE_FORMAT_VALID |
>>> - AVI_UNDERSCANNED_DISPLAY_VALID);
>>> -
>>> - /*
>>> - * Set the aspect ratio as per the mode, mentioned in
>>> - * Table 9 AVI InfoFrame Data Byte 2 of CEA-861-D Standard
>>> - */
>>> - ar = hdata->current_mode.picture_aspect_ratio;
>>> - switch (ar) {
>>> - case HDMI_PICTURE_ASPECT_4_3:
>>> - ar |= AVI_4_3_CENTER_RATIO;
>>> - break;
>>> - case HDMI_PICTURE_ASPECT_16_9:
>>> - ar |= AVI_16_9_CENTER_RATIO;
>>> - break;
>>> - case HDMI_PICTURE_ASPECT_NONE:
>>> - default:
>>> - ar |= AVI_SAME_AS_PIC_ASPECT_RATIO;
>>> - break;
>>> - }
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(2), ar);
>>> + hdmi_reg_write_buf(hdata, HDMI_AVI_HEADER0, buf, ret);
>>> + } else {
>>> + DRM_INFO("%s: invalid AVI infoframe (%d)\n", __func__, ret);
>> If drm_hdmi_avi_infoframe_from_display_mode function returns 0 on success, then above message will be printed out. Seems not reasonable.
>
> If drm_hdmi_avi_infoframe_from_display_mode returns 0, then
> hdmi_avi_infoframe_pack is called and if the latter
> fails (practically impossible) this message will be printed which is
> correct behavior.
Right. The condition, "ret >= 0" made me confusing.
>
> The same answer is for your next comments.
>
> Regards
> Andrzej
>
>>
>>> + }
>>>
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_BYTE(4), hdata->cea_video_id);
>>> + ret = drm_hdmi_vendor_infoframe_from_display_mode(&frm.vendor.hdmi,
>>> + &hdata->current_mode);
>>> + if (ret >= 0)
>> Ditto.
>>
>>> + ret = hdmi_vendor_infoframe_pack(&frm.vendor.hdmi, buf,
>>> + sizeof(buf));
>>> + if (ret > 0) {
>>> + hdmi_reg_writeb(hdata, HDMI_VSI_CON, HDMI_VSI_CON_EVERY_VSYNC);
>>> + hdmi_reg_write_buf(hdata, HDMI_VSI_HEADER0, buf, ret);
>> Also above codes should be called when drm_hdmi_vendor_infoframe_from_display_mode function returned 0 and the value from hdmi_vendor_infoframe_pack function is more than 1.
>>
>>> + }
>>>
>>> - chksum = hdmi_chksum(hdata, HDMI_AVI_BYTE(1),
>>> - infoframe->any.length, hdr_sum);
>>> - DRM_DEBUG_KMS("AVI checksum = 0x%x\n", chksum);
>>> - hdmi_reg_writeb(hdata, HDMI_AVI_CHECK_SUM, chksum);
>>> - break;
>>> - case HDMI_INFOFRAME_TYPE_AUDIO:
>>> - hdmi_reg_writeb(hdata, HDMI_AUI_CON, 0x02);
>>> - hdmi_reg_writeb(hdata, HDMI_AUI_HEADER0, infoframe->any.type);
>>> - hdmi_reg_writeb(hdata, HDMI_AUI_HEADER1,
>>> - infoframe->any.version);
>>> - hdmi_reg_writeb(hdata, HDMI_AUI_HEADER2, infoframe->any.length);
>>> - hdr_sum = infoframe->any.type + infoframe->any.version +
>>> - infoframe->any.length;
>>> - chksum = hdmi_chksum(hdata, HDMI_AUI_BYTE(1),
>>> - infoframe->any.length, hdr_sum);
>>> - DRM_DEBUG_KMS("AUI checksum = 0x%x\n", chksum);
>>> - hdmi_reg_writeb(hdata, HDMI_AUI_CHECK_SUM, chksum);
>>> - break;
>>> - default:
>>> - break;
>>> + ret = hdmi_audio_infoframe_init(&frm.audio);
>>> + if (ret >= 0) {
>> Ditto.
>>
>>> + frm.audio.channels = 2;
>>> + ret = hdmi_audio_infoframe_pack(&frm.audio, buf, sizeof(buf));
>>> + }
>>> + if (ret > 0) {
>>> + hdmi_reg_writeb(hdata, HDMI_AUI_CON, HDMI_AUI_CON_EVERY_VSYNC);
>>> + hdmi_reg_write_buf(hdata, HDMI_AUI_HEADER0, buf, ret);
>> Also above codes should be called when hdmi_audio_infoframe_init function returned 0 and the value from hdmi_audio_infoframe_pack function is more than 1.
>>
>>> }
>>> }
>>>
>>> @@ -1127,8 +1077,6 @@ static void hdmi_start(struct hdmi_context *hdata, bool start)
>>>
>>> static void hdmi_conf_init(struct hdmi_context *hdata)
>>> {
>>> - union hdmi_infoframe infoframe;
>>> -
>>> /* disable HPD interrupts from HDMI IP block, use GPIO instead */
>>> hdmi_reg_writemask(hdata, HDMI_INTC_CON, 0, HDMI_INTC_EN_GLOBAL |
>>> HDMI_INTC_EN_HPD_PLUG | HDMI_INTC_EN_HPD_UNPLUG);
>>> @@ -1164,15 +1112,7 @@ static void hdmi_conf_init(struct hdmi_context *hdata)
>>> hdmi_reg_writeb(hdata, HDMI_V13_AUI_CON, 0x02);
>>> hdmi_reg_writeb(hdata, HDMI_V13_ACR_CON, 0x04);
>>> } else {
>>> - infoframe.any.type = HDMI_INFOFRAME_TYPE_AVI;
>>> - infoframe.any.version = HDMI_AVI_VERSION;
>>> - infoframe.any.length = HDMI_AVI_LENGTH;
>>> - hdmi_reg_infoframe(hdata, &infoframe);
>>> -
>>> - infoframe.any.type = HDMI_INFOFRAME_TYPE_AUDIO;
>>> - infoframe.any.version = HDMI_AUI_VERSION;
>>> - infoframe.any.length = HDMI_AUI_LENGTH;
>>> - hdmi_reg_infoframe(hdata, &infoframe);
>>> + hdmi_reg_infoframes(hdata);
>>>
>>> /* enable AVI packet every vsync, fixes purple line problem */
>>> hdmi_reg_writemask(hdata, HDMI_CON_1, 2, 3 << 5);
>>> @@ -1458,7 +1398,6 @@ static void hdmi_mode_set(struct drm_encoder *encoder,
>>> "INTERLACED" : "PROGRESSIVE");
>>>
>>> drm_mode_copy(&hdata->current_mode, m);
>>> - hdata->cea_video_id = drm_match_cea_mode(mode);
>>> }
>>>
>>> static void hdmi_set_refclk(struct hdmi_context *hdata, bool on)
>>> diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
>>> index 169667a..a0507dc 100644
>>> --- a/drivers/gpu/drm/exynos/regs-hdmi.h
>>> +++ b/drivers/gpu/drm/exynos/regs-hdmi.h
>>> @@ -361,9 +361,11 @@
>>>
>>> /* AUI bit definition */
>>> #define HDMI_AUI_CON_NO_TRAN (0 << 0)
>>> +#define HDMI_AUI_CON_EVERY_VSYNC (1 << 1)
>>>
>>> /* VSI bit definition */
>>> #define HDMI_VSI_CON_DO_NOT_TRANSMIT (0 << 0)
>>> +#define HDMI_VSI_CON_EVERY_VSYNC (1 << 1)
>>>
>>> /* HDCP related registers */
>>> #define HDMI_HDCP_SHA1(n) HDMI_CORE_BASE(0x7000 + 4 * (n))
>>>
>>
>
>
>
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