diff options
Diffstat (limited to 'drivers/video/hdmi.c')
| -rw-r--r-- | drivers/video/hdmi.c | 425 |
1 files changed, 399 insertions, 26 deletions
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index 53e7ee2c83fc..08d94ab00467 100644 --- a/drivers/video/hdmi.c +++ b/drivers/video/hdmi.c @@ -68,8 +68,36 @@ int hdmi_avi_infoframe_init(struct hdmi_avi_infoframe *frame) } EXPORT_SYMBOL(hdmi_avi_infoframe_init); +static int hdmi_avi_infoframe_check_only(const struct hdmi_avi_infoframe *frame) +{ + if (frame->type != HDMI_INFOFRAME_TYPE_AVI || + frame->version != 2 || + frame->length != HDMI_AVI_INFOFRAME_SIZE) + return -EINVAL; + + if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9) + return -EINVAL; + + return 0; +} + /** - * hdmi_avi_infoframe_pack() - write HDMI AVI infoframe to binary buffer + * hdmi_avi_infoframe_check() - check a HDMI AVI infoframe + * @frame: HDMI AVI infoframe + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields. + * + * Returns 0 on success or a negative error code on failure. + */ +int hdmi_avi_infoframe_check(struct hdmi_avi_infoframe *frame) +{ + return hdmi_avi_infoframe_check_only(frame); +} +EXPORT_SYMBOL(hdmi_avi_infoframe_check); + +/** + * hdmi_avi_infoframe_pack_only() - write HDMI AVI infoframe to binary buffer * @frame: HDMI AVI infoframe * @buffer: destination buffer * @size: size of buffer @@ -82,20 +110,22 @@ EXPORT_SYMBOL(hdmi_avi_infoframe_init); * Returns the number of bytes packed into the binary buffer or a negative * error code on failure. */ -ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer, - size_t size) +ssize_t hdmi_avi_infoframe_pack_only(const struct hdmi_avi_infoframe *frame, + void *buffer, size_t size) { u8 *ptr = buffer; size_t length; + int ret; + + ret = hdmi_avi_infoframe_check_only(frame); + if (ret) + return ret; length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; if (size < length) return -ENOSPC; - if (frame->picture_aspect > HDMI_PICTURE_ASPECT_16_9) - return -EINVAL; - memset(buffer, 0, size); ptr[0] = frame->type; @@ -152,6 +182,36 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer, return length; } +EXPORT_SYMBOL(hdmi_avi_infoframe_pack_only); + +/** + * hdmi_avi_infoframe_pack() - check a HDMI AVI infoframe, + * and write it to binary buffer + * @frame: HDMI AVI infoframe + * @buffer: destination buffer + * @size: size of buffer + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields, after which it packs the information + * contained in the @frame structure into a binary representation that + * can be written into the corresponding controller registers. This function + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4 + * specification. + * + * Returns the number of bytes packed into the binary buffer or a negative + * error code on failure. + */ +ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, + void *buffer, size_t size) +{ + int ret; + + ret = hdmi_avi_infoframe_check(frame); + if (ret) + return ret; + + return hdmi_avi_infoframe_pack_only(frame, buffer, size); +} EXPORT_SYMBOL(hdmi_avi_infoframe_pack); /** @@ -178,8 +238,33 @@ int hdmi_spd_infoframe_init(struct hdmi_spd_infoframe *frame, } EXPORT_SYMBOL(hdmi_spd_infoframe_init); +static int hdmi_spd_infoframe_check_only(const struct hdmi_spd_infoframe *frame) +{ + if (frame->type != HDMI_INFOFRAME_TYPE_SPD || + frame->version != 1 || + frame->length != HDMI_SPD_INFOFRAME_SIZE) + return -EINVAL; + + return 0; +} + /** - * hdmi_spd_infoframe_pack() - write HDMI SPD infoframe to binary buffer + * hdmi_spd_infoframe_check() - check a HDMI SPD infoframe + * @frame: HDMI SPD infoframe + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields. + * + * Returns 0 on success or a negative error code on failure. + */ +int hdmi_spd_infoframe_check(struct hdmi_spd_infoframe *frame) +{ + return hdmi_spd_infoframe_check_only(frame); +} +EXPORT_SYMBOL(hdmi_spd_infoframe_check); + +/** + * hdmi_spd_infoframe_pack_only() - write HDMI SPD infoframe to binary buffer * @frame: HDMI SPD infoframe * @buffer: destination buffer * @size: size of buffer @@ -192,11 +277,16 @@ EXPORT_SYMBOL(hdmi_spd_infoframe_init); * Returns the number of bytes packed into the binary buffer or a negative * error code on failure. */ -ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer, - size_t size) +ssize_t hdmi_spd_infoframe_pack_only(const struct hdmi_spd_infoframe *frame, + void *buffer, size_t size) { u8 *ptr = buffer; size_t length; + int ret; + + ret = hdmi_spd_infoframe_check_only(frame); + if (ret) + return ret; length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; @@ -222,6 +312,36 @@ ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, void *buffer, return length; } +EXPORT_SYMBOL(hdmi_spd_infoframe_pack_only); + +/** + * hdmi_spd_infoframe_pack() - check a HDMI SPD infoframe, + * and write it to binary buffer + * @frame: HDMI SPD infoframe + * @buffer: destination buffer + * @size: size of buffer + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields, after which it packs the information + * contained in the @frame structure into a binary representation that + * can be written into the corresponding controller registers. This function + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4 + * specification. + * + * Returns the number of bytes packed into the binary buffer or a negative + * error code on failure. + */ +ssize_t hdmi_spd_infoframe_pack(struct hdmi_spd_infoframe *frame, + void *buffer, size_t size) +{ + int ret; + + ret = hdmi_spd_infoframe_check(frame); + if (ret) + return ret; + + return hdmi_spd_infoframe_pack_only(frame, buffer, size); +} EXPORT_SYMBOL(hdmi_spd_infoframe_pack); /** @@ -242,8 +362,33 @@ int hdmi_audio_infoframe_init(struct hdmi_audio_infoframe *frame) } EXPORT_SYMBOL(hdmi_audio_infoframe_init); +static int hdmi_audio_infoframe_check_only(const struct hdmi_audio_infoframe *frame) +{ + if (frame->type != HDMI_INFOFRAME_TYPE_AUDIO || + frame->version != 1 || + frame->length != HDMI_AUDIO_INFOFRAME_SIZE) + return -EINVAL; + + return 0; +} + +/** + * hdmi_audio_infoframe_check() - check a HDMI audio infoframe + * @frame: HDMI audio infoframe + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields. + * + * Returns 0 on success or a negative error code on failure. + */ +int hdmi_audio_infoframe_check(struct hdmi_audio_infoframe *frame) +{ + return hdmi_audio_infoframe_check_only(frame); +} +EXPORT_SYMBOL(hdmi_audio_infoframe_check); + /** - * hdmi_audio_infoframe_pack() - write HDMI audio infoframe to binary buffer + * hdmi_audio_infoframe_pack_only() - write HDMI audio infoframe to binary buffer * @frame: HDMI audio infoframe * @buffer: destination buffer * @size: size of buffer @@ -256,12 +401,17 @@ EXPORT_SYMBOL(hdmi_audio_infoframe_init); * Returns the number of bytes packed into the binary buffer or a negative * error code on failure. */ -ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, - void *buffer, size_t size) +ssize_t hdmi_audio_infoframe_pack_only(const struct hdmi_audio_infoframe *frame, + void *buffer, size_t size) { unsigned char channels; u8 *ptr = buffer; size_t length; + int ret; + + ret = hdmi_audio_infoframe_check_only(frame); + if (ret) + return ret; length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; @@ -297,6 +447,36 @@ ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, return length; } +EXPORT_SYMBOL(hdmi_audio_infoframe_pack_only); + +/** + * hdmi_audio_infoframe_pack() - check a HDMI Audio infoframe, + * and write it to binary buffer + * @frame: HDMI Audio infoframe + * @buffer: destination buffer + * @size: size of buffer + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields, after which it packs the information + * contained in the @frame structure into a binary representation that + * can be written into the corresponding controller registers. This function + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4 + * specification. + * + * Returns the number of bytes packed into the binary buffer or a negative + * error code on failure. + */ +ssize_t hdmi_audio_infoframe_pack(struct hdmi_audio_infoframe *frame, + void *buffer, size_t size) +{ + int ret; + + ret = hdmi_audio_infoframe_check(frame); + if (ret) + return ret; + + return hdmi_audio_infoframe_pack_only(frame, buffer, size); +} EXPORT_SYMBOL(hdmi_audio_infoframe_pack); /** @@ -319,6 +499,7 @@ int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame) * value */ frame->s3d_struct = HDMI_3D_STRUCTURE_INVALID; + frame->length = 4; return 0; } @@ -335,8 +516,42 @@ static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *fram return 4; } +static int hdmi_vendor_infoframe_check_only(const struct hdmi_vendor_infoframe *frame) +{ + if (frame->type != HDMI_INFOFRAME_TYPE_VENDOR || + frame->version != 1 || + frame->oui != HDMI_IEEE_OUI) + return -EINVAL; + + /* only one of those can be supplied */ + if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) + return -EINVAL; + + if (frame->length != hdmi_vendor_infoframe_length(frame)) + return -EINVAL; + + return 0; +} + /** - * hdmi_vendor_infoframe_pack() - write a HDMI vendor infoframe to binary buffer + * hdmi_vendor_infoframe_check() - check a HDMI vendor infoframe + * @frame: HDMI infoframe + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields. + * + * Returns 0 on success or a negative error code on failure. + */ +int hdmi_vendor_infoframe_check(struct hdmi_vendor_infoframe *frame) +{ + frame->length = hdmi_vendor_infoframe_length(frame); + + return hdmi_vendor_infoframe_check_only(frame); +} +EXPORT_SYMBOL(hdmi_vendor_infoframe_check); + +/** + * hdmi_vendor_infoframe_pack_only() - write a HDMI vendor infoframe to binary buffer * @frame: HDMI infoframe * @buffer: destination buffer * @size: size of buffer @@ -349,17 +564,16 @@ static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *fram * Returns the number of bytes packed into the binary buffer or a negative * error code on failure. */ -ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame, - void *buffer, size_t size) +ssize_t hdmi_vendor_infoframe_pack_only(const struct hdmi_vendor_infoframe *frame, + void *buffer, size_t size) { u8 *ptr = buffer; size_t length; + int ret; - /* only one of those can be supplied */ - if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) - return -EINVAL; - - frame->length = hdmi_vendor_infoframe_length(frame); + ret = hdmi_vendor_infoframe_check_only(frame); + if (ret) + return ret; length = HDMI_INFOFRAME_HEADER_SIZE + frame->length; @@ -394,24 +608,134 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame, return length; } +EXPORT_SYMBOL(hdmi_vendor_infoframe_pack_only); + +/** + * hdmi_vendor_infoframe_pack() - check a HDMI Vendor infoframe, + * and write it to binary buffer + * @frame: HDMI Vendor infoframe + * @buffer: destination buffer + * @size: size of buffer + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields, after which it packs the information + * contained in the @frame structure into a binary representation that + * can be written into the corresponding controller registers. This function + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4 + * specification. + * + * Returns the number of bytes packed into the binary buffer or a negative + * error code on failure. + */ +ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame, + void *buffer, size_t size) +{ + int ret; + + ret = hdmi_vendor_infoframe_check(frame); + if (ret) + return ret; + + return hdmi_vendor_infoframe_pack_only(frame, buffer, size); +} EXPORT_SYMBOL(hdmi_vendor_infoframe_pack); +static int +hdmi_vendor_any_infoframe_check_only(const union hdmi_vendor_any_infoframe *frame) +{ + if (frame->any.type != HDMI_INFOFRAME_TYPE_VENDOR || + frame->any.version != 1) + return -EINVAL; + + return 0; +} + /* - * hdmi_vendor_any_infoframe_pack() - write a vendor infoframe to binary buffer + * hdmi_vendor_any_infoframe_check() - check a vendor infoframe + */ +static int +hdmi_vendor_any_infoframe_check(union hdmi_vendor_any_infoframe *frame) +{ + int ret; + + ret = hdmi_vendor_any_infoframe_check_only(frame); + if (ret) + return ret; + + /* we only know about HDMI vendor infoframes */ + if (frame->any.oui != HDMI_IEEE_OUI) + return -EINVAL; + + return hdmi_vendor_infoframe_check(&frame->hdmi); +} + +/* + * hdmi_vendor_any_infoframe_pack_only() - write a vendor infoframe to binary buffer */ static ssize_t -hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame, - void *buffer, size_t size) +hdmi_vendor_any_infoframe_pack_only(const union hdmi_vendor_any_infoframe *frame, + void *buffer, size_t size) { + int ret; + + ret = hdmi_vendor_any_infoframe_check_only(frame); + if (ret) + return ret; + /* we only know about HDMI vendor infoframes */ if (frame->any.oui != HDMI_IEEE_OUI) return -EINVAL; - return hdmi_vendor_infoframe_pack(&frame->hdmi, buffer, size); + return hdmi_vendor_infoframe_pack_only(&frame->hdmi, buffer, size); +} + +/* + * hdmi_vendor_any_infoframe_pack() - check a vendor infoframe, + * and write it to binary buffer + */ +static ssize_t +hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame, + void *buffer, size_t size) +{ + int ret; + + ret = hdmi_vendor_any_infoframe_check(frame); + if (ret) + return ret; + + return hdmi_vendor_any_infoframe_pack_only(frame, buffer, size); +} + +/** + * hdmi_infoframe_check() - check a HDMI infoframe + * @frame: HDMI infoframe + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields. + * + * Returns 0 on success or a negative error code on failure. + */ +int +hdmi_infoframe_check(union hdmi_infoframe *frame) +{ + switch (frame->any.type) { + case HDMI_INFOFRAME_TYPE_AVI: + return hdmi_avi_infoframe_check(&frame->avi); + case HDMI_INFOFRAME_TYPE_SPD: + return hdmi_spd_infoframe_check(&frame->spd); + case HDMI_INFOFRAME_TYPE_AUDIO: + return hdmi_audio_infoframe_check(&frame->audio); + case HDMI_INFOFRAME_TYPE_VENDOR: + return hdmi_vendor_any_infoframe_check(&frame->vendor); + default: + WARN(1, "Bad infoframe type %d\n", frame->any.type); + return -EINVAL; + } } +EXPORT_SYMBOL(hdmi_infoframe_check); /** - * hdmi_infoframe_pack() - write a HDMI infoframe to binary buffer + * hdmi_infoframe_pack_only() - write a HDMI infoframe to binary buffer * @frame: HDMI infoframe * @buffer: destination buffer * @size: size of buffer @@ -425,7 +749,56 @@ hdmi_vendor_any_infoframe_pack(union hdmi_vendor_any_infoframe *frame, * error code on failure. */ ssize_t -hdmi_infoframe_pack(union hdmi_infoframe *frame, void *buffer, size_t size) +hdmi_infoframe_pack_only(const union hdmi_infoframe *frame, void *buffer, size_t size) +{ + ssize_t length; + + switch (frame->any.type) { + case HDMI_INFOFRAME_TYPE_AVI: + length = hdmi_avi_infoframe_pack_only(&frame->avi, + buffer, size); + break; + case HDMI_INFOFRAME_TYPE_SPD: + length = hdmi_spd_infoframe_pack_only(&frame->spd, + buffer, size); + break; + case HDMI_INFOFRAME_TYPE_AUDIO: + length = hdmi_audio_infoframe_pack_only(&frame->audio, + buffer, size); + break; + case HDMI_INFOFRAME_TYPE_VENDOR: + length = hdmi_vendor_any_infoframe_pack_only(&frame->vendor, + buffer, size); + break; + default: + WARN(1, "Bad infoframe type %d\n", frame->any.type); + length = -EINVAL; + } + + return length; +} +EXPORT_SYMBOL(hdmi_infoframe_pack_only); + +/** + * hdmi_infoframe_pack() - check a HDMI infoframe, + * and write it to binary buffer + * @frame: HDMI infoframe + * @buffer: destination buffer + * @size: size of buffer + * + * Validates that the infoframe is consistent and updates derived fields + * (eg. length) based on other fields, after which it packs the information + * contained in the @frame structure into a binary representation that + * can be written into the corresponding controller registers. This function + * also computes the checksum as required by section 5.3.5 of the HDMI 1.4 + * specification. + * + * Returns the number of bytes packed into the binary buffer or a negative + * error code on failure. + */ +ssize_t +hdmi_infoframe_pack(union hdmi_infoframe *frame, + void *buffer, size_t size) { ssize_t length; |