From 8299d1f057439f94c6a4412e2e5c5082b82a30c9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 21 Aug 2021 10:54:34 +0200 Subject: bcm27xx: add kernel 5.10 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Rebased RPi foundation patches on linux 5.10.59, removed applied and reverted patches, wireless patches and defconfig patches. bcm2708: boot tested on RPi B+ v1.2 bcm2709: boot tested on RPi 4B v1.1 4G bcm2711: boot tested on RPi 4B v1.1 4G Signed-off-by: Álvaro Fernández Rojas --- ...-drm-gud-Add-async_flush-module-parameter.patch | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.10/950-0716-drm-gud-Add-async_flush-module-parameter.patch (limited to 'target/linux/bcm27xx/patches-5.10/950-0716-drm-gud-Add-async_flush-module-parameter.patch') diff --git a/target/linux/bcm27xx/patches-5.10/950-0716-drm-gud-Add-async_flush-module-parameter.patch b/target/linux/bcm27xx/patches-5.10/950-0716-drm-gud-Add-async_flush-module-parameter.patch new file mode 100644 index 0000000000..d93e6945ed --- /dev/null +++ b/target/linux/bcm27xx/patches-5.10/950-0716-drm-gud-Add-async_flush-module-parameter.patch @@ -0,0 +1,55 @@ +From e0eb7ca2dd07ca8878b67cc20e75f9d7e46d80f4 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= +Date: Sat, 3 Jul 2021 16:13:21 +0200 +Subject: [PATCH] drm/gud: Add async_flush module parameter +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +[ drm-misc commit a0356899ebe8ecde0da9c5685cc47154db973a5e ] + +Provide a way for userspace to choose synchronous flushing/pageflips. +This helps save CPU and power. + +It is also useful for test scripts since userspace can know when a flush +has happended and wait before doing the next visual test. + +Cc: Linus Walleij +Signed-off-by: Noralf Trønnes +Reviewed-by: Peter Stuge +Link: https://patchwork.freedesktop.org/patch/msgid/20210703141321.35494-2-noralf@tronnes.org +--- + drivers/gpu/drm/gud/gud_pipe.c | 15 +++++++++++++++ + 1 file changed, 15 insertions(+) + +--- a/drivers/gpu/drm/gud/gud_pipe.c ++++ b/drivers/gpu/drm/gud/gud_pipe.c +@@ -24,6 +24,19 @@ + #include "gud_internal.h" + + /* ++ * Some userspace rendering loops runs all displays in the same loop. ++ * This means that a fast display will have to wait for a slow one. ++ * For this reason gud does flushing asynchronous by default. ++ * The down side is that in e.g. a single display setup userspace thinks ++ * the display is insanely fast since the driver reports back immediately ++ * that the flush/pageflip is done. This wastes CPU and power. ++ * Such users might want to set this module parameter to false. ++ */ ++static bool gud_async_flush = true; ++module_param_named(async_flush, gud_async_flush, bool, 0644); ++MODULE_PARM_DESC(async_flush, "Enable asynchronous flushing [default=true]"); ++ ++/* + * FIXME: The driver is probably broken on Big Endian machines. + * See discussion: + * https://lore.kernel.org/dri-devel/CAKb7UvihLX0hgBOP3VBG7O+atwZcUVCPVuBdfmDMpg0NjXe-cQ@mail.gmail.com/ +@@ -577,6 +590,8 @@ void gud_pipe_update(struct drm_simple_d + if (gdrm->flags & GUD_DISPLAY_FLAG_FULL_UPDATE) + drm_rect_init(&damage, 0, 0, fb->width, fb->height); + gud_fb_queue_damage(gdrm, fb, &damage); ++ if (!gud_async_flush) ++ flush_work(&gdrm->work); + } + + if (!crtc->state->enable) -- cgit v1.2.3