From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:49642 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752022AbcJ1IqE (ORCPT ); Fri, 28 Oct 2016 04:46:04 -0400 Subject: Patch "drm/radeon: change vblank_time's calculation method to reduce computational error." has been added to the 4.4-stable tree To: alexander.deucher@amd.com, gregkh@linuxfoundation.org Cc: , From: Date: Fri, 28 Oct 2016 04:46:06 -0400 Message-ID: <14776443661011@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled drm/radeon: change vblank_time's calculation method to reduce computational error. to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-radeon-change-vblank_time-s-calculation-method-to-reduce-computational-error.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 02cfb5fccb0f9f968f0e208d89d9769aa16267bc Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Wed, 12 Oct 2016 15:28:55 -0400 Subject: drm/radeon: change vblank_time's calculation method to reduce computational error. From: Alex Deucher commit 02cfb5fccb0f9f968f0e208d89d9769aa16267bc upstream. Ported from Rex's amdgpu change. Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/r600_dpm.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) --- a/drivers/gpu/drm/radeon/r600_dpm.c +++ b/drivers/gpu/drm/radeon/r600_dpm.c @@ -156,19 +156,20 @@ u32 r600_dpm_get_vblank_time(struct rade struct drm_device *dev = rdev->ddev; struct drm_crtc *crtc; struct radeon_crtc *radeon_crtc; - u32 line_time_us, vblank_lines; + u32 vblank_in_pixels; u32 vblank_time_us = 0xffffffff; /* if the displays are off, vblank time is max */ if (rdev->num_crtc && rdev->mode_info.mode_config_initialized) { list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { radeon_crtc = to_radeon_crtc(crtc); if (crtc->enabled && radeon_crtc->enabled && radeon_crtc->hw_mode.clock) { - line_time_us = (radeon_crtc->hw_mode.crtc_htotal * 1000) / - radeon_crtc->hw_mode.clock; - vblank_lines = radeon_crtc->hw_mode.crtc_vblank_end - - radeon_crtc->hw_mode.crtc_vdisplay + - (radeon_crtc->v_border * 2); - vblank_time_us = vblank_lines * line_time_us; + vblank_in_pixels = + radeon_crtc->hw_mode.crtc_htotal * + (radeon_crtc->hw_mode.crtc_vblank_end - + radeon_crtc->hw_mode.crtc_vdisplay + + (radeon_crtc->v_border * 2)); + + vblank_time_us = vblank_in_pixels * 1000 / radeon_crtc->hw_mode.clock; break; } } Patches currently in stable-queue which might be from alexander.deucher@amd.com are queue-4.4/drm-amdgpu-dce11-add-missing-drm_mode_config_cleanup-call.patch queue-4.4/drm-radeon-si-dpm-fix-phase-shedding-setup.patch queue-4.4/drm-amdgpu-dce11-disable-hpd-on-local-panels.patch queue-4.4/drm-amdgpu-dce8-disable-hpd-on-local-panels.patch queue-4.4/drm-amdgpu-dce10-disable-hpd-on-local-panels.patch queue-4.4/drm-amdgpu-fix-ib-alignment-for-uvd.patch queue-4.4/drm-amdgpu-change-vblank_time-s-calculation-method-to-reduce-computational-error.patch queue-4.4/drm-radeon-narrow-asic_init-for-virtualization.patch queue-4.4/drm-radeon-change-vblank_time-s-calculation-method-to-reduce-computational-error.patch