diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/backlight/88pm860x_bl.c | 2 | ||||
| -rw-r--r-- | drivers/video/backlight/pm8941-wled.c | 2 | ||||
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 28 | ||||
| -rw-r--r-- | drivers/video/fbdev/amifb.c | 4 | ||||
| -rw-r--r-- | drivers/video/fbdev/da8xx-fb.c | 6 | ||||
| -rw-r--r-- | drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c | 2 | ||||
| -rw-r--r-- | drivers/video/hdmi.c | 511 |
7 files changed, 479 insertions, 76 deletions
diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c index 6d8dc2c77520..51e0c4be08df 100644 --- a/drivers/video/backlight/88pm860x_bl.c +++ b/drivers/video/backlight/88pm860x_bl.c @@ -174,7 +174,7 @@ static int pm860x_backlight_dt_init(struct platform_device *pdev, return -ENODEV; } for_each_child_of_node(nproot, np) { - if (!of_node_cmp(np->name, name)) { + if (of_node_name_eq(np, name)) { of_property_read_u32(np, "marvell,88pm860x-iset", &iset); data->iset = PM8606_WLED_CURRENT(iset); diff --git a/drivers/video/backlight/pm8941-wled.c b/drivers/video/backlight/pm8941-wled.c index 0b6d21955d91..da6aab20fdcb 100644 --- a/drivers/video/backlight/pm8941-wled.c +++ b/drivers/video/backlight/pm8941-wled.c @@ -330,7 +330,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) rc = of_property_read_string(dev->of_node, "label", &wled->name); if (rc) - wled->name = dev->of_node->name; + wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); *cfg = pm8941_wled_config_defaults; for (i = 0; i < ARRAY_SIZE(u32_opts); ++i) { diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index f9ef0673a083..feb90764a811 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -30,6 +30,7 @@ struct pwm_bl_data { struct device *dev; unsigned int lth_brightness; unsigned int *levels; + bool enabled; struct regulator *power_supply; struct gpio_desc *enable_gpio; unsigned int scale; @@ -50,7 +51,7 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb) int err; pwm_get_state(pb->pwm, &state); - if (state.enabled) + if (pb->enabled) return; err = regulator_enable(pb->power_supply); @@ -65,6 +66,8 @@ static void pwm_backlight_power_on(struct pwm_bl_data *pb) if (pb->enable_gpio) gpiod_set_value_cansleep(pb->enable_gpio, 1); + + pb->enabled = true; } static void pwm_backlight_power_off(struct pwm_bl_data *pb) @@ -72,7 +75,7 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb) struct pwm_state state; pwm_get_state(pb->pwm, &state); - if (!state.enabled) + if (!pb->enabled) return; if (pb->enable_gpio) @@ -86,6 +89,7 @@ static void pwm_backlight_power_off(struct pwm_bl_data *pb) pwm_apply_state(pb->pwm, &state); regulator_disable(pb->power_supply); + pb->enabled = false; } static int compute_duty_cycle(struct pwm_bl_data *pb, int brightness) @@ -269,6 +273,16 @@ static int pwm_backlight_parse_dt(struct device *dev, memset(data, 0, sizeof(*data)); /* + * These values are optional and set as 0 by default, the out values + * are modified only if a valid u32 value can be decoded. + */ + of_property_read_u32(node, "post-pwm-on-delay-ms", + &data->post_pwm_on_delay); + of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay); + + data->enable_gpio = -EINVAL; + + /* * Determine the number of brightness levels, if this property is not * set a default table of brightness levels will be used. */ @@ -380,15 +394,6 @@ static int pwm_backlight_parse_dt(struct device *dev, data->max_brightness--; } - /* - * These values are optional and set as 0 by default, the out values - * are modified only if a valid u32 value can be decoded. - */ - of_property_read_u32(node, "post-pwm-on-delay-ms", - &data->post_pwm_on_delay); - of_property_read_u32(node, "pwm-off-delay-ms", &data->pwm_off_delay); - - data->enable_gpio = -EINVAL; return 0; } @@ -483,6 +488,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->check_fb = data->check_fb; pb->exit = data->exit; pb->dev = &pdev->dev; + pb->enabled = false; pb->post_pwm_on_delay = data->post_pwm_on_delay; pb->pwm_off_delay = data->pwm_off_delay; diff --git a/drivers/video/fbdev/amifb.c b/drivers/video/fbdev/amifb.c index 0777aff211e5..758457026694 100644 --- a/drivers/video/fbdev/amifb.c +++ b/drivers/video/fbdev/amifb.c @@ -1855,7 +1855,7 @@ static int ami_get_var_cursorinfo(struct fb_var_cursorinfo *var, var->yspot = par->crsr.spot_y; if (size > var->height * var->width) return -ENAMETOOLONG; - if (!access_ok(VERIFY_WRITE, data, size)) + if (!access_ok(data, size)) return -EFAULT; delta = 1 << par->crsr.fmode; lspr = lofsprite + (delta << 1); @@ -1935,7 +1935,7 @@ static int ami_set_var_cursorinfo(struct fb_var_cursorinfo *var, return -EINVAL; if (!var->height) return -EINVAL; - if (!access_ok(VERIFY_READ, data, var->width * var->height)) + if (!access_ok(data, var->width * var->height)) return -EFAULT; delta = 1 << fmode; lofsprite = shfsprite = (u_short *)spritememory; diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c index a74096c53cb5..43f2a4816860 100644 --- a/drivers/video/fbdev/da8xx-fb.c +++ b/drivers/video/fbdev/da8xx-fb.c @@ -1446,9 +1446,9 @@ static int fb_probe(struct platform_device *device) da8xx_fb_fix.line_length - 1; /* allocate palette buffer */ - par->v_palette_base = dma_zalloc_coherent(NULL, PALETTE_SIZE, - &par->p_palette_base, - GFP_KERNEL | GFP_DMA); + par->v_palette_base = dma_alloc_coherent(NULL, PALETTE_SIZE, + &par->p_palette_base, + GFP_KERNEL | GFP_DMA); if (!par->v_palette_base) { dev_err(&device->dev, "GLCD: kmalloc for palette buffer failed\n"); diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c b/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c index a846d32ee653..8e23160ec59f 100644 --- a/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c +++ b/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c @@ -493,7 +493,7 @@ static int omapfb_memory_read(struct fb_info *fbi, if (!display || !display->driver->memory_read) return -ENOENT; - if (!access_ok(VERIFY_WRITE, mr->buffer, mr->buffer_size)) + if (!access_ok(mr->buffer, mr->buffer_size)) return -EFAULT; if (mr->w > 4096 || mr->h > 4096) diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index 8a3e8f61b991..799ae49774f5 100644 --- a/drivers/video/hdmi.c +++ b/drivers/video/hdmi.c @@ -31,7 +31,7 @@ #define hdmi_log(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__) -static u8 hdmi_infoframe_checksum(u8 *ptr, size_t size) +static u8 hdmi_infoframe_checksum(const u8 *ptr, size_t size) { u8 csum = 0; size_t i; @@ -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_pack() - write HDMI audio infoframe to binary buffer + * 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_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_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() - write a HDMI vendor infoframe to binary buffer + * 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_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() - write a vendor infoframe to binary buffer + * 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_pack() - write a HDMI infoframe to binary buffer + * 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_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; @@ -471,7 +844,7 @@ static const char *hdmi_infoframe_type_get_name(enum hdmi_infoframe_type type) static void hdmi_infoframe_log_header(const char *level, struct device *dev, - struct hdmi_any_infoframe *frame) + const struct hdmi_any_infoframe *frame) { hdmi_log("HDMI infoframe: %s, version %u, length %u\n", hdmi_infoframe_type_get_name(frame->type), @@ -673,10 +1046,10 @@ hdmi_content_type_get_name(enum hdmi_content_type content_type) */ static void hdmi_avi_infoframe_log(const char *level, struct device *dev, - struct hdmi_avi_infoframe *frame) + const struct hdmi_avi_infoframe *frame) { hdmi_infoframe_log_header(level, dev, - (struct hdmi_any_infoframe *)frame); + (const struct hdmi_any_infoframe *)frame); hdmi_log(" colorspace: %s\n", hdmi_colorspace_get_name(frame->colorspace)); @@ -750,12 +1123,12 @@ static const char *hdmi_spd_sdi_get_name(enum hdmi_spd_sdi sdi) */ static void hdmi_spd_infoframe_log(const char *level, struct device *dev, - struct hdmi_spd_infoframe *frame) + const struct hdmi_spd_infoframe *frame) { u8 buf[17]; hdmi_infoframe_log_header(level, dev, - (struct hdmi_any_infoframe *)frame); + (const struct hdmi_any_infoframe *)frame); memset(buf, 0, sizeof(buf)); @@ -886,10 +1259,10 @@ hdmi_audio_coding_type_ext_get_name(enum hdmi_audio_coding_type_ext ctx) */ static void hdmi_audio_infoframe_log(const char *level, struct device *dev, - struct hdmi_audio_infoframe *frame) + const struct hdmi_audio_infoframe *frame) { hdmi_infoframe_log_header(level, dev, - (struct hdmi_any_infoframe *)frame); + (const struct hdmi_any_infoframe *)frame); if (frame->channels) hdmi_log(" channels: %u\n", frame->channels - 1); @@ -949,12 +1322,12 @@ hdmi_3d_structure_get_name(enum hdmi_3d_structure s3d_struct) static void hdmi_vendor_any_infoframe_log(const char *level, struct device *dev, - union hdmi_vendor_any_infoframe *frame) + const union hdmi_vendor_any_infoframe *frame) { - struct hdmi_vendor_infoframe *hvf = &frame->hdmi; + const struct hdmi_vendor_infoframe *hvf = &frame->hdmi; hdmi_infoframe_log_header(level, dev, - (struct hdmi_any_infoframe *)frame); + (const struct hdmi_any_infoframe *)frame); if (frame->any.oui != HDMI_IEEE_OUI) { hdmi_log(" not a HDMI vendor infoframe\n"); @@ -984,7 +1357,7 @@ hdmi_vendor_any_infoframe_log(const char *level, */ void hdmi_infoframe_log(const char *level, struct device *dev, - union hdmi_infoframe *frame) + const union hdmi_infoframe *frame) { switch (frame->any.type) { case HDMI_INFOFRAME_TYPE_AVI: @@ -1005,8 +1378,9 @@ EXPORT_SYMBOL(hdmi_infoframe_log); /** * hdmi_avi_infoframe_unpack() - unpack binary buffer to a HDMI AVI infoframe - * @buffer: source buffer * @frame: HDMI AVI infoframe + * @buffer: source buffer + * @size: size of buffer * * Unpacks the information contained in binary @buffer into a structured * @frame of the HDMI Auxiliary Video (AVI) information frame. @@ -1016,11 +1390,14 @@ EXPORT_SYMBOL(hdmi_infoframe_log); * Returns 0 on success or a negative error code on failure. */ static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame, - void *buffer) + const void *buffer, size_t size) { - u8 *ptr = buffer; + const u8 *ptr = buffer; int ret; + if (size < HDMI_INFOFRAME_SIZE(AVI)) + return -EINVAL; + if (ptr[0] != HDMI_INFOFRAME_TYPE_AVI || ptr[1] != 2 || ptr[2] != HDMI_AVI_INFOFRAME_SIZE) @@ -1068,8 +1445,9 @@ static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame, /** * hdmi_spd_infoframe_unpack() - unpack binary buffer to a HDMI SPD infoframe - * @buffer: source buffer * @frame: HDMI SPD infoframe + * @buffer: source buffer + * @size: size of buffer * * Unpacks the information contained in binary @buffer into a structured * @frame of the HDMI Source Product Description (SPD) information frame. @@ -1079,11 +1457,14 @@ static int hdmi_avi_infoframe_unpack(struct hdmi_avi_infoframe *frame, * Returns 0 on success or a negative error code on failure. */ static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame, - void *buffer) + const void *buffer, size_t size) { - u8 *ptr = buffer; + const u8 *ptr = buffer; int ret; + if (size < HDMI_INFOFRAME_SIZE(SPD)) + return -EINVAL; + if (ptr[0] != HDMI_INFOFRAME_TYPE_SPD || ptr[1] != 1 || ptr[2] != HDMI_SPD_INFOFRAME_SIZE) { @@ -1106,8 +1487,9 @@ static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame, /** * hdmi_audio_infoframe_unpack() - unpack binary buffer to a HDMI AUDIO infoframe - * @buffer: source buffer * @frame: HDMI Audio infoframe + * @buffer: source buffer + * @size: size of buffer * * Unpacks the information contained in binary @buffer into a structured * @frame of the HDMI Audio information frame. @@ -1117,11 +1499,14 @@ static int hdmi_spd_infoframe_unpack(struct hdmi_spd_infoframe *frame, * Returns 0 on success or a negative error code on failure. */ static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame, - void *buffer) + const void *buffer, size_t size) { - u8 *ptr = buffer; + const u8 *ptr = buffer; int ret; + if (size < HDMI_INFOFRAME_SIZE(AUDIO)) + return -EINVAL; + if (ptr[0] != HDMI_INFOFRAME_TYPE_AUDIO || ptr[1] != 1 || ptr[2] != HDMI_AUDIO_INFOFRAME_SIZE) { @@ -1151,8 +1536,9 @@ static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame, /** * hdmi_vendor_infoframe_unpack() - unpack binary buffer to a HDMI vendor infoframe - * @buffer: source buffer * @frame: HDMI Vendor infoframe + * @buffer: source buffer + * @size: size of buffer * * Unpacks the information contained in binary @buffer into a structured * @frame of the HDMI Vendor information frame. @@ -1163,14 +1549,17 @@ static int hdmi_audio_infoframe_unpack(struct hdmi_audio_infoframe *frame, */ static int hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame, - void *buffer) + const void *buffer, size_t size) { - u8 *ptr = buffer; + const u8 *ptr = buffer; size_t length; int ret; u8 hdmi_video_format; struct hdmi_vendor_infoframe *hvf = &frame->hdmi; + if (size < HDMI_INFOFRAME_HEADER_SIZE) + return -EINVAL; + if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR || ptr[1] != 1 || (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6)) @@ -1178,6 +1567,9 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame, length = ptr[2]; + if (size < HDMI_INFOFRAME_HEADER_SIZE + length) + return -EINVAL; + if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_HEADER_SIZE + length) != 0) return -EINVAL; @@ -1224,8 +1616,9 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame, /** * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe - * @buffer: source buffer * @frame: HDMI infoframe + * @buffer: source buffer + * @size: size of buffer * * Unpacks the information contained in binary buffer @buffer into a structured * @frame of a HDMI infoframe. @@ -1234,23 +1627,27 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame, * * Returns 0 on success or a negative error code on failure. */ -int hdmi_infoframe_unpack(union hdmi_infoframe *frame, void *buffer) +int hdmi_infoframe_unpack(union hdmi_infoframe *frame, + const void *buffer, size_t size) { int ret; - u8 *ptr = buffer; + const u8 *ptr = buffer; + + if (size < HDMI_INFOFRAME_HEADER_SIZE) + return -EINVAL; switch (ptr[0]) { case HDMI_INFOFRAME_TYPE_AVI: - ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer); + ret = hdmi_avi_infoframe_unpack(&frame->avi, buffer, size); break; case HDMI_INFOFRAME_TYPE_SPD: - ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer); + ret = hdmi_spd_infoframe_unpack(&frame->spd, buffer, size); break; case HDMI_INFOFRAME_TYPE_AUDIO: - ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer); + ret = hdmi_audio_infoframe_unpack(&frame->audio, buffer, size); break; case HDMI_INFOFRAME_TYPE_VENDOR: - ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer); + ret = hdmi_vendor_any_infoframe_unpack(&frame->vendor, buffer, size); break; default: ret = -EINVAL; |