diff options
Diffstat (limited to 'gnu/packages/patches/linux-libre-mnt-reform-0003-lcdif-fix-pcie-interference.patch')
| -rw-r--r-- | gnu/packages/patches/linux-libre-mnt-reform-0003-lcdif-fix-pcie-interference.patch | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/gnu/packages/patches/linux-libre-mnt-reform-0003-lcdif-fix-pcie-interference.patch b/gnu/packages/patches/linux-libre-mnt-reform-0003-lcdif-fix-pcie-interference.patch new file mode 100644 index 0000000000..9a3a97e309 --- /dev/null +++ b/gnu/packages/patches/linux-libre-mnt-reform-0003-lcdif-fix-pcie-interference.patch @@ -0,0 +1,70 @@ +From bcc4ac93892276613ab6791659ad1418adf5a887 Mon Sep 17 00:00:00 2001 +From: "Lukas F. Hartmann" <lukas@mntre.com> +Date: Wed, 7 Sep 2022 06:23:35 +0200 +Subject: [PATCH 3/7] lcdif-fix-pcie-interference + +--- + drivers/gpu/drm/mxsfb/mxsfb_kms.c | 34 ++++++++++++++++++++++++++++++- + 1 file changed, 33 insertions(+), 1 deletion(-) + +diff --git a/drivers/gpu/drm/mxsfb/mxsfb_kms.c b/drivers/gpu/drm/mxsfb/mxsfb_kms.c +index e38ce57..25f80a6 100644 +--- a/drivers/gpu/drm/mxsfb/mxsfb_kms.c ++++ b/drivers/gpu/drm/mxsfb/mxsfb_kms.c +@@ -304,7 +304,7 @@ static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb, + + mxsfb_set_formats(mxsfb, bus_format); + +- clk_set_rate(mxsfb->clk, m->crtc_clock * 1000); ++ clk_set_rate(mxsfb->clk, m->crtc_clock * 660); + + mxsfb_set_mode(mxsfb, bus_flags); + } +@@ -663,12 +663,44 @@ static const uint64_t mxsfb_modifiers[] = { + * Initialization + */ + ++void imx8mq_pcie_qos_for_lcdif(void) ++{ ++ void __iomem *qosc = ioremap(0x307f0000, 0x2100); ++ // clock and unlock QoSC registers ++ writel(0x0, qosc); ++ writel(0x1, qosc); ++ writel(0x0, qosc+0x60); ++ ++ // limit number of outstanding transactions for PCIe1 ++ writel(0x0, qosc+0x1000); ++ writel(0x1, qosc+0x1000); ++ writel(0x01010100, qosc+0x1050); ++ writel(0x01010100, qosc+0x1060); ++ writel(0x01010100, qosc+0x1070); ++ writel(0x1, qosc+0x1000); ++ ++ // limit number of outstanding transactions for PCIe2 ++ writel(0x0, qosc+0x2000); ++ writel(0x1, qosc+0x2000); ++ writel(0x01010100, qosc+0x2050); ++ writel(0x01010100, qosc+0x2060); ++ writel(0x01010100, qosc+0x2070); ++ writel(0x1, qosc+0x2000); ++ ++ iounmap(qosc); ++} ++ + int mxsfb_kms_init(struct mxsfb_drm_private *mxsfb) + { + struct drm_encoder *encoder = &mxsfb->encoder; + struct drm_crtc *crtc = &mxsfb->crtc; + int ret; + ++ /* ++ FIXME Workaround to fix PCIe interfering with LCDIF refresh (MNT Reform) ++ */ ++ imx8mq_pcie_qos_for_lcdif(); ++ + drm_plane_helper_add(&mxsfb->planes.primary, + &mxsfb_plane_primary_helper_funcs); + ret = drm_universal_plane_init(mxsfb->drm, &mxsfb->planes.primary, 1, +-- +2.37.2 + |