From 77e97abf129c5028385dd72587eabab68db0d954 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Thu, 28 May 2020 19:08:55 +0200 Subject: bcm27xx: update to latest patches from RPi foundation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Also removes random module and switches to new bcm2711 thermal driver. Boot tested on RPi 4B v1.1 4G. Signed-off-by: Álvaro Fernández Rojas --- ...-0621-vc4_hdmi_phy-Fix-offset-calculation.patch | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0621-vc4_hdmi_phy-Fix-offset-calculation.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0621-vc4_hdmi_phy-Fix-offset-calculation.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0621-vc4_hdmi_phy-Fix-offset-calculation.patch b/target/linux/bcm27xx/patches-5.4/950-0621-vc4_hdmi_phy-Fix-offset-calculation.patch new file mode 100644 index 0000000000..83d8d25e29 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0621-vc4_hdmi_phy-Fix-offset-calculation.patch @@ -0,0 +1,30 @@ +From 9da2d153eb010d3e92083c322e87de9ae066d93e Mon Sep 17 00:00:00 2001 +From: popcornmix +Date: Thu, 2 Apr 2020 16:46:31 +0100 +Subject: [PATCH] vc4_hdmi_phy: Fix offset calculation + +The original firmware code worked with float and did + offset = ((vco_freq / fref * 2) * (1 << 22)); + offset >>= 2; + +In this code it's all integer so doing the integer divide before the shift loses lots of precision + +This fixes the issue of 1080p59.94 mode having 59.64 fps + +Signed-off-by: popcornmix +--- + drivers/gpu/drm/vc4/vc4_hdmi_phy.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi_phy.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi_phy.c +@@ -192,8 +192,8 @@ static u32 phy_get_rm_offset(unsigned lo + + /* RM offset is stored as 9.22 format */ + offset = vco_freq * 2; +- do_div(offset, fref); + offset = offset << 22; ++ do_div(offset, fref); + offset >>= 2; + + return offset; -- cgit v1.2.3