<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">Hi Neil,</span></div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;"><br> </span></div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">AFBC 1.0 does not support (ignoring common prefix </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">AFBC_FORMAT_MOD_) BLOCK_SIZE_32x8</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">BLOCK_SIZE_64x4</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">BLOCK_SIZE_32x8_64x4</span><br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">CBR</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">TILED</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, SC, DB and BCH modifiers.</span><br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">AFBC 1.2 does not support </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">BLOCK_SIZE_64x4</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, </span><span style="font-size: 11pt; font-family: "Courier New", monospace; line-height: normal;">BLOCK_SIZE_32x8_64x4</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">, DB and BCH modifiers.</span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;"><br> </span></div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">Beyond that it's very hard to say. The AFBC version numbers refer to versions of the specification, but aren't very useful for describing the actual bitstream format.</span><span><br> </span><span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">To determine which modifiers _are_ supported, you will really need to get technical documentation from the SoC vendor</span><br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">Regards,</span></div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <span style="font-size: 11pt; line-height: normal; font-family: "Courier New", monospace;">Ayan Kumar Halder</span><br> </div> <div id="appendonsend"></div> <div style="font-family:Calibri,Arial,Helvetica,sans-serif; font-size:12pt; color:rgb(0,0,0)"> <br> </div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>From:</b> Neil Armstrong <narmstrong@baylibre.com><br> <b>Sent:</b> Tuesday, February 26, 2019 2:15 PM<br> <b>To:</b> Ayan Halder; Liviu Dudau<br> <b>Cc:</b> DRI Development<br> <b>Subject:</b> AFBC versions modifiers</font> <div> </div> </div> <div class="BodyFragment"><font size="2"><span style="font-size:11pt"> <div class="PlainText">Hi Ayan,<br> <br> Could you help distinguish which are the AFBC modifiers for each version of AFBC ?<br> <br> The Amlogic SoCs embeds an AFBC 1.0 compatible decoder, then the newer SoCs embeds an AFBC 1.2 decoder,<br> I assume the modifiers before the patch "drm/fourcc: Add modifier defininitions for AFBC 1.3" are<br> valid for AFBC 1.2, but what is the subset for 1.0 and 1.1 ?<br> <br> Thanks,<br> Neil<br> <br> -- <br> Neil Armstrong<br> Embedded Linux Software Engineer<br> BayLibre - At the Heart of Embedded Linux<br> <a href="http://www.baylibre.com">www.baylibre.com</a><br> </div> </span></font></div> </body> </html>