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[4.9,55/61] drm/psr: Fix missed entry in PSR setup time table.

Message ID 20180605170121.179297476@linuxfoundation.org (mailing list archive)
State New, archived
Headers show

Commit Message

Greg Kroah-Hartman June 5, 2018, 5:02 p.m. UTC 
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>

commit bdcc02cf1bb508fc700df7662f55058f651f2621 upstream.

Entry corresponding to 220 us setup time was missing. I am not aware of
any specific bug this fixes, but this could potentially result in enabling
PSR on a panel with a higher setup time requirement than supported by the
hardware.

I verified the value is present in eDP spec versions 1.3, 1.4 and 1.4a.

Fixes: 6608804b3d7f ("drm/dp: Add drm_dp_psr_setup_time()")
Cc: stable@vger.kernel.org
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Jose Roberto de Souza <jose.souza@intel.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Tarun Vyas <tarun.vyas@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180511195145.3829-3-dhinakaran.pandiyan@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/drm_dp_helper.c |    1 +
 1 file changed, 1 insertion(+)
diff mbox

Patch

--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1065,6 +1065,7 @@  int drm_dp_psr_setup_time(const u8 psr_c
 	static const u16 psr_setup_time_us[] = {
 		PSR_SETUP_TIME(330),
 		PSR_SETUP_TIME(275),
+		PSR_SETUP_TIME(220),
 		PSR_SETUP_TIME(165),
 		PSR_SETUP_TIME(110),
 		PSR_SETUP_TIME(55),