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62b7f5931c
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 <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
56 lines
1.7 KiB
Diff
56 lines
1.7 KiB
Diff
From ff882e312a746a4a794a089e912e5e56baa8b5b4 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Fri, 3 Jul 2020 14:11:55 +0100
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Subject: [PATCH] drm/vc4: Make FKMS max refresh rate a module
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parameter
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Some people want to use the high refresh rate modes for 1080p100
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and 1080p120, but they're currently filtered out as generally
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they don't add anything.
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Make the filter threshold a module parameter so that it can be
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adjusted.
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https://github.com/raspberrypi/linux/issues/3677
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_firmware_kms.c | 12 ++++++++++--
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1 file changed, 10 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_firmware_kms.c
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@@ -14,6 +14,8 @@
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* Pi's firmware display stack.
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*/
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+#include <linux/module.h>
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+
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#include "drm/drm_atomic_helper.h"
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#include "drm/drm_gem_framebuffer_helper.h"
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#include "drm/drm_plane_helper.h"
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@@ -32,6 +34,10 @@
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#include "vc_image_types.h"
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#include <soc/bcm2835/raspberrypi-firmware.h>
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+int fkms_max_refresh_rate = 85;
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+module_param(fkms_max_refresh_rate, int, 0644);
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+MODULE_PARM_DESC(fkms_max_refresh_rate, "Max supported refresh rate");
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+
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struct get_display_cfg {
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u32 max_pixel_clock[2]; //Max pixel clock for each display
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};
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@@ -1069,8 +1075,10 @@ vc4_crtc_mode_valid(struct drm_crtc *crt
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return MODE_NO_DBLESCAN;
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}
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- /* Disable refresh rates > 85Hz as limited gain from them */
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- if (drm_mode_vrefresh(mode) > 85)
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+ /* Disable refresh rates > defined threshold (default 85Hz) as limited
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+ * gain from them
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+ */
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+ if (drm_mode_vrefresh(mode) > fkms_max_refresh_rate)
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return MODE_BAD_VVALUE;
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/* Limit the pixel clock based on the HDMI clock limits from the
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