From f07e572f6447465d8938679533d604e402b0f066 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Thu, 18 Feb 2021 18:04:33 +0100 Subject: bcm27xx: import latest patches from the RPi foundation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G bcm2710: boot tested on RPi 3B v1.2 bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas --- ...interrupt-handing-for-non-existent-displa.patch | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0278-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0278-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0278-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch b/target/linux/bcm27xx/patches-5.4/950-0278-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch new file mode 100644 index 0000000000..60c9c9b03f --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0278-Fixup-FKMS-interrupt-handing-for-non-existent-displa.patch @@ -0,0 +1,39 @@ +From d6baa1bd90e7e68ac69d5378d70174ea67bf35dc Mon Sep 17 00:00:00 2001 +From: James Hughes +Date: Mon, 29 Jul 2019 12:02:59 +0100 +Subject: [PATCH] Fixup FKMS interrupt handing for non-existent display + +If an errant interrupt flag was received from a non-existent display, +a NULL pointer access was made. Protect against this by checking if a +second display is present prior to checking the interrupt flags. +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 17 ++++++++++------- + 1 file changed, 10 insertions(+), 7 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -1087,14 +1087,17 @@ static irqreturn_t vc4_crtc_irq_handler( + vc4_crtc_handle_page_flip(crtc_list[0]); + } + +- /* Check for the secondary display too */ +- chan = readl(crtc_list[0]->regs + SMIDSW1); ++ if (crtc_list[1]) { ++ /* Check for the secondary display too */ ++ chan = readl(crtc_list[0]->regs + SMIDSW1); + +- if (chan & 1) { +- writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1); +- if (crtc_list[1]->vblank_enabled) +- drm_crtc_handle_vblank(&crtc_list[1]->base); +- vc4_crtc_handle_page_flip(crtc_list[1]); ++ if (chan & 1) { ++ writel(SMI_NEW, crtc_list[0]->regs + SMIDSW1); ++ ++ if (crtc_list[1]->vblank_enabled) ++ drm_crtc_handle_vblank(&crtc_list[1]->base); ++ vc4_crtc_handle_page_flip(crtc_list[1]); ++ } + } + } + -- cgit v1.2.3