diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0859-drm-vc4-Make-FKMS-max-refresh-rate-a-module-paramete.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0859-drm-vc4-Make-FKMS-max-refresh-rate-a-module-paramete.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0859-drm-vc4-Make-FKMS-max-refresh-rate-a-module-paramete.patch b/target/linux/bcm27xx/patches-5.4/950-0859-drm-vc4-Make-FKMS-max-refresh-rate-a-module-paramete.patch new file mode 100644 index 0000000000..bf27d7aa53 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0859-drm-vc4-Make-FKMS-max-refresh-rate-a-module-paramete.patch @@ -0,0 +1,55 @@ +From ff882e312a746a4a794a089e912e5e56baa8b5b4 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Fri, 3 Jul 2020 14:11:55 +0100 +Subject: [PATCH] drm/vc4: Make FKMS max refresh rate a module + parameter + +Some people want to use the high refresh rate modes for 1080p100 +and 1080p120, but they're currently filtered out as generally +they don't add anything. + +Make the filter threshold a module parameter so that it can be +adjusted. + +https://github.com/raspberrypi/linux/issues/3677 + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/gpu/drm/vc4/vc4_firmware_kms.c | 12 ++++++++++-- + 1 file changed, 10 insertions(+), 2 deletions(-) + +--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c +@@ -14,6 +14,8 @@ + * Pi's firmware display stack. + */ + ++#include <linux/module.h> ++ + #include "drm/drm_atomic_helper.h" + #include "drm/drm_gem_framebuffer_helper.h" + #include "drm/drm_plane_helper.h" +@@ -32,6 +34,10 @@ + #include "vc_image_types.h" + #include <soc/bcm2835/raspberrypi-firmware.h> + ++int fkms_max_refresh_rate = 85; ++module_param(fkms_max_refresh_rate, int, 0644); ++MODULE_PARM_DESC(fkms_max_refresh_rate, "Max supported refresh rate"); ++ + struct get_display_cfg { + u32 max_pixel_clock[2]; //Max pixel clock for each display + }; +@@ -1069,8 +1075,10 @@ vc4_crtc_mode_valid(struct drm_crtc *crt + return MODE_NO_DBLESCAN; + } + +- /* Disable refresh rates > 85Hz as limited gain from them */ +- if (drm_mode_vrefresh(mode) > 85) ++ /* Disable refresh rates > defined threshold (default 85Hz) as limited ++ * gain from them ++ */ ++ if (drm_mode_vrefresh(mode) > fkms_max_refresh_rate) + return MODE_BAD_VVALUE; + + /* Limit the pixel clock based on the HDMI clock limits from the |