<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style> </head> <body dir="ltr"> <p style="font-family:Arial;font-size:11pt;color:#0078D7;margin:5pt;" align="Left"> [AMD Official Use Only - Internal Distribution Only]<br> </p> <br> <div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> Hi Bindu,</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> <br> </div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"> The value is recommended by the hardware team. Since a non-recommended value was being used, that itself is the root cause. I will add this to commit message.<br> </div> <div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> <br> </div> <div id="Signature"> <div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> --</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);"> Thanks & Regards,</div> <div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"> Aurabindo Pillai<br> </div> </div> </div> </div> <div id="appendonsend"></div> <hr style="display:inline-block;width:98%" tabindex="-1"> <div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> R, Bindu <Bindu.R@amd.com><br> <b>Sent:</b> Thursday, April 8, 2021 11:55 AM<br> <b>To:</b> Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org><br> <b>Cc:</b> Aberback, Joshua <Joshua.Aberback@amd.com><br> <b>Subject:</b> Re: [PATCH] drm/amd/display: Update DCN302 SR Exit Latency</font> <div> </div> </div> <style type="text/css" style="display:none">  </style> <div dir="ltr"> <p align="Left" style="font-family:Arial; font-size:11pt; color:#0078D7; margin:5pt"> [AMD Official Use Only - Internal Distribution Only]<br> </p> <br> <div> <div><span style="font-size:11pt">Hi Jay,</span></div> <div><span style="font-size:11pt"> Could you please add few details on the root cause, in the [Why/How] section?</span></div> <div><span style="font-size:11pt"><br> </span></div> <div><span style="font-size:11pt">Thanks,</span></div> <div><span style="font-size:11pt">Bindu <br> </span></div> <div id="x_appendonsend"></div> <hr tabindex="-1" style="display:inline-block; width:98%"> <div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Aurabindo Pillai <aurabindo.pillai@amd.com><br> <b>Sent:</b> Thursday, April 8, 2021 11:48 AM<br> <b>To:</b> amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org><br> <b>Cc:</b> Pillai, Aurabindo <Aurabindo.Pillai@amd.com>; R, Bindu <Bindu.R@amd.com>; Aberback, Joshua <Joshua.Aberback@amd.com><br> <b>Subject:</b> [PATCH] drm/amd/display: Update DCN302 SR Exit Latency</font> <div> </div> </div> <div class="x_BodyFragment"><font size="2"><span style="font-size:11pt"> <div class="x_PlainText">From: Joshua Aberback <joshua.aberback@amd.com><br> <br> [Why]<br> Update SR Exit Latency to fix screen flickering caused due to OTG<br> underflow<br> <br> Signed-off-by: Joshua Aberback <joshua.aberback@amd.com><br> Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com><br> ---<br> drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c | 2 +-<br> 1 file changed, 1 insertion(+), 1 deletion(-)<br> <br> diff --git a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c<br> index a928c1d9a557..fc2dea243d1b 100644<br> --- a/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c<br> +++ b/drivers/gpu/drm/amd/display/dc/dcn302/dcn302_resource.c<br> @@ -164,7 +164,7 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_02_soc = {<br> <br> .min_dcfclk = 500.0, /* TODO: set this to actual min DCFCLK */<br> .num_states = 1,<br> - .sr_exit_time_us = 12,<br> + .sr_exit_time_us = 15.5,<br> .sr_enter_plus_exit_time_us = 20,<br> .urgent_latency_us = 4.0,<br> .urgent_latency_pixel_data_only_us = 4.0,<br> -- <br> 2.31.1<br> <br> </div> </span></font></div> </div> </div> </div> </body> </html>