From cffe1e89dc9bf541a39d9287ced7c5addff07084 Mon Sep 17 00:00:00 2001 From: Arnaud Pouliquen Date: Thu, 5 Feb 2015 11:55:02 +0100 Subject: drm: sti: HDMI add audio infoframe Add a default audio infoframe for HDMI compliance Signed-off-by: Arnaud Pouliquen --- drivers/gpu/drm/sti/sti_hdmi.c | 179 +++++++++++++++++++++++++++++++---------- 1 file changed, 137 insertions(+), 42 deletions(-) (limited to 'drivers/gpu/drm/sti') diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c index e840ca5de401..1485ade98710 100644 --- a/drivers/gpu/drm/sti/sti_hdmi.c +++ b/drivers/gpu/drm/sti/sti_hdmi.c @@ -42,8 +42,17 @@ #define HDMI_SW_DI_1_PKT_WORD5 0x0228 #define HDMI_SW_DI_1_PKT_WORD6 0x022C #define HDMI_SW_DI_CFG 0x0230 +#define HDMI_SW_DI_2_HEAD_WORD 0x0600 +#define HDMI_SW_DI_2_PKT_WORD0 0x0604 +#define HDMI_SW_DI_2_PKT_WORD1 0x0608 +#define HDMI_SW_DI_2_PKT_WORD2 0x060C +#define HDMI_SW_DI_2_PKT_WORD3 0x0610 +#define HDMI_SW_DI_2_PKT_WORD4 0x0614 +#define HDMI_SW_DI_2_PKT_WORD5 0x0618 +#define HDMI_SW_DI_2_PKT_WORD6 0x061C #define HDMI_IFRAME_SLOT_AVI 1 +#define HDMI_IFRAME_SLOT_AUDIO 2 #define XCAT(prefix, x, suffix) prefix ## x ## suffix #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD) @@ -99,6 +108,10 @@ #define HDMI_STA_SW_RST BIT(1) +#define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0) +#define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8) +#define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16) + struct sti_hdmi_connector { struct drm_connector drm_connector; struct drm_encoder *encoder; @@ -227,6 +240,90 @@ static void hdmi_config(struct sti_hdmi *hdmi) hdmi_write(hdmi, conf, HDMI_CFG); } +/** + * Helper to concatenate infoframe in 32 bits word + * + * @ptr: pointer on the hdmi internal structure + * @data: infoframe to write + * @size: size to write + */ +static inline unsigned int hdmi_infoframe_subpack(const u8 *ptr, size_t size) +{ + unsigned long value = 0; + size_t i; + + for (i = size; i > 0; i--) + value = (value << 8) | ptr[i - 1]; + + return value; +} + +/** + * Helper to write info frame + * + * @hdmi: pointer on the hdmi internal structure + * @data: infoframe to write + * @size: size to write + */ +static void hdmi_infoframe_write_infopack(struct sti_hdmi *hdmi, const u8 *data) +{ + const u8 *ptr = data; + u32 val, slot, mode, i; + u32 head_offset, pack_offset; + size_t size; + + switch (*ptr) { + case HDMI_INFOFRAME_TYPE_AVI: + slot = HDMI_IFRAME_SLOT_AVI; + mode = HDMI_IFRAME_FIELD; + head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI); + pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI); + size = HDMI_AVI_INFOFRAME_SIZE; + break; + + case HDMI_INFOFRAME_TYPE_AUDIO: + slot = HDMI_IFRAME_SLOT_AUDIO; + mode = HDMI_IFRAME_FRAME; + head_offset = HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AUDIO); + pack_offset = HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AUDIO); + size = HDMI_AUDIO_INFOFRAME_SIZE; + break; + + default: + DRM_ERROR("unsupported infoframe type: %#x\n", *ptr); + return; + } + + /* Disable transmission slot for updated infoframe */ + val = hdmi_read(hdmi, HDMI_SW_DI_CFG); + val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, slot); + hdmi_write(hdmi, val, HDMI_SW_DI_CFG); + + val = HDMI_INFOFRAME_HEADER_TYPE(*ptr++); + val |= HDMI_INFOFRAME_HEADER_VERSION(*ptr++); + val |= HDMI_INFOFRAME_HEADER_LEN(*ptr++); + writel(val, hdmi->regs + head_offset); + + /* + * Each subpack contains 4 bytes + * The First Bytes of the first subpacket must contain the checksum + * Packet size in increase by one. + */ + for (i = 0; i < size; i += sizeof(u32)) { + size_t num; + + num = min_t(size_t, size - i, sizeof(u32)); + val = hdmi_infoframe_subpack(ptr, num); + ptr += sizeof(u32); + writel(val, hdmi->regs + pack_offset + i); + } + + /* Enable transmission slot for updated infoframe */ + val = hdmi_read(hdmi, HDMI_SW_DI_CFG); + val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, slot); + hdmi_write(hdmi, val, HDMI_SW_DI_CFG); +} + /** * Prepare and configure the AVI infoframe * @@ -243,8 +340,6 @@ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi) struct drm_display_mode *mode = &hdmi->mode; struct hdmi_avi_infoframe infoframe; u8 buffer[HDMI_INFOFRAME_SIZE(AVI)]; - u8 *frame = buffer + HDMI_INFOFRAME_HEADER_SIZE; - u32 val; int ret; DRM_DEBUG_DRIVER("\n"); @@ -266,47 +361,43 @@ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi) return ret; } - /* Disable transmission slot for AVI infoframe */ - val = hdmi_read(hdmi, HDMI_SW_DI_CFG); - val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, HDMI_IFRAME_SLOT_AVI); - hdmi_write(hdmi, val, HDMI_SW_DI_CFG); + hdmi_infoframe_write_infopack(hdmi, buffer); - /* Infoframe header */ - val = buffer[0]; - val |= buffer[1] << 8; - val |= buffer[2] << 16; - hdmi_write(hdmi, val, HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI)); - - /* Infoframe packet bytes */ - val = buffer[3]; - val |= *(frame++) << 8; - val |= *(frame++) << 16; - val |= *(frame++) << 24; - hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI)); - - val = *(frame++); - val |= *(frame++) << 8; - val |= *(frame++) << 16; - val |= *(frame++) << 24; - hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD1(HDMI_IFRAME_SLOT_AVI)); - - val = *(frame++); - val |= *(frame++) << 8; - val |= *(frame++) << 16; - val |= *(frame++) << 24; - hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD2(HDMI_IFRAME_SLOT_AVI)); - - val = *(frame++); - val |= *(frame) << 8; - hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD3(HDMI_IFRAME_SLOT_AVI)); - - /* Enable transmission slot for AVI infoframe - * According to the hdmi specification, AVI infoframe should be - * transmitted at least once per two video fields - */ - val = hdmi_read(hdmi, HDMI_SW_DI_CFG); - val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, HDMI_IFRAME_SLOT_AVI); - hdmi_write(hdmi, val, HDMI_SW_DI_CFG); + return 0; +} + +/** + * Prepare and configure the AUDIO infoframe + * + * AUDIO infoframe are transmitted once per frame and + * contains information about HDMI transmission mode such as audio codec, + * sample size, ... + * + * @hdmi: pointer on the hdmi internal structure + * + * Return negative value if error occurs + */ +static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi) +{ + struct hdmi_audio_infoframe infofame; + u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)]; + int ret; + + ret = hdmi_audio_infoframe_init(&infofame); + if (ret < 0) { + DRM_ERROR("failed to setup audio infoframe: %d\n", ret); + return ret; + } + + infofame.channels = 2; + + ret = hdmi_audio_infoframe_pack(&infofame, buffer, sizeof(buffer)); + if (ret < 0) { + DRM_ERROR("failed to pack audio infoframe: %d\n", ret); + return ret; + } + + hdmi_infoframe_write_infopack(hdmi, buffer); return 0; } @@ -427,6 +518,10 @@ static void sti_hdmi_pre_enable(struct drm_bridge *bridge) if (hdmi_avi_infoframe_config(hdmi)) DRM_ERROR("Unable to configure AVI infoframe\n"); + /* Program AUDIO infoframe */ + if (hdmi_audio_infoframe_config(hdmi)) + DRM_ERROR("Unable to configure AUDIO infoframe\n"); + /* Sw reset */ hdmi_swreset(hdmi); } -- cgit v1.2.1