diff options
Diffstat (limited to 'drivers/media/v4l2-core/v4l2-dv-timings.c')
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-dv-timings.c | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/drivers/media/v4l2-core/v4l2-dv-timings.c b/drivers/media/v4l2-core/v4l2-dv-timings.c index d26edf157e64..346d1b0e10ce 100644 --- a/drivers/media/v4l2-core/v4l2-dv-timings.c +++ b/drivers/media/v4l2-core/v4l2-dv-timings.c @@ -764,7 +764,7 @@ bool v4l2_detect_gtf(unsigned int frame_height, u64 num; u32 den; - num = ((image_width * GTF_D_C_PRIME * (u64)hfreq) - + num = (((u64)image_width * GTF_D_C_PRIME * hfreq) - ((u64)image_width * GTF_D_M_PRIME * 1000)); den = (hfreq * (100 - GTF_D_C_PRIME) + GTF_D_M_PRIME * 1000) * (2 * GTF_CELL_GRAN); @@ -774,7 +774,7 @@ bool v4l2_detect_gtf(unsigned int frame_height, u64 num; u32 den; - num = ((image_width * GTF_S_C_PRIME * (u64)hfreq) - + num = (((u64)image_width * GTF_S_C_PRIME * hfreq) - ((u64)image_width * GTF_S_M_PRIME * 1000)); den = (hfreq * (100 - GTF_S_C_PRIME) + GTF_S_M_PRIME * 1000) * (2 * GTF_CELL_GRAN); @@ -1018,6 +1018,42 @@ v4l2_hdmi_rx_colorimetry(const struct hdmi_avi_infoframe *avi, EXPORT_SYMBOL_GPL(v4l2_hdmi_rx_colorimetry); /** + * v4l2_num_edid_blocks() - return the number of EDID blocks + * + * @edid: pointer to the EDID data + * @max_blocks: maximum number of supported EDID blocks + * + * Return: the number of EDID blocks based on the contents of the EDID. + * This supports the HDMI Forum EDID Extension Override Data Block. + */ +unsigned int v4l2_num_edid_blocks(const u8 *edid, unsigned int max_blocks) +{ + unsigned int blocks; + + if (!edid || !max_blocks) + return 0; + + // The number of extension blocks is recorded at byte 126 of the + // first 128-byte block in the EDID. + // + // If there is an HDMI Forum EDID Extension Override Data Block + // present, then it is in bytes 4-6 of the first CTA-861 extension + // block of the EDID. + blocks = edid[126] + 1; + // Check for HDMI Forum EDID Extension Override Data Block + if (blocks >= 2 && // The EDID must be at least 2 blocks + max_blocks >= 3 && // The caller supports at least 3 blocks + edid[128] == 2 && // The first extension block is type CTA-861 + edid[133] == 0x78 && // Identifier for the EEODB + (edid[132] & 0xe0) == 0xe0 && // Tag Code == 7 + (edid[132] & 0x1f) >= 2 && // Length >= 2 + edid[134] > 1) // Number of extension blocks is sane + blocks = edid[134] + 1; + return blocks > max_blocks ? max_blocks : blocks; +} +EXPORT_SYMBOL_GPL(v4l2_num_edid_blocks); + +/** * v4l2_get_edid_phys_addr() - find and return the physical address * * @edid: pointer to the EDID data @@ -1190,6 +1226,7 @@ DEBUGFS_FOPS(avi, V4L2_DEBUGFS_IF_AVI); DEBUGFS_FOPS(audio, V4L2_DEBUGFS_IF_AUDIO); DEBUGFS_FOPS(spd, V4L2_DEBUGFS_IF_SPD); DEBUGFS_FOPS(hdmi, V4L2_DEBUGFS_IF_HDMI); +DEBUGFS_FOPS(drm, V4L2_DEBUGFS_IF_DRM); struct v4l2_debugfs_if *v4l2_debugfs_if_alloc(struct dentry *root, u32 if_types, void *priv, @@ -1219,6 +1256,9 @@ struct v4l2_debugfs_if *v4l2_debugfs_if_alloc(struct dentry *root, u32 if_types, if (if_types & V4L2_DEBUGFS_IF_HDMI) debugfs_create_file("hdmi", 0400, infoframes->if_dir, infoframes, &infoframe_hdmi_fops); + if (if_types & V4L2_DEBUGFS_IF_DRM) + debugfs_create_file("hdr_drm", 0400, infoframes->if_dir, + infoframes, &infoframe_drm_fops); return infoframes; } EXPORT_SYMBOL_GPL(v4l2_debugfs_if_alloc); |