From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: [PATCH 06/37] ACPI: VIDEO: Adjust current level to closest available one. Date: Wed, 10 Oct 2007 01:06:13 -0400 Message-ID: <1191992804-14965-7-git-send-email-lenb@kernel.org> References: <1191992804-14965-1-git-send-email-lenb@kernel.org> Return-path: Received: from mga10.intel.com ([192.55.52.92]:45224 "EHLO fmsmga102.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751073AbXJJFGt (ORCPT ); Wed, 10 Oct 2007 01:06:49 -0400 In-Reply-To: <1191992804-14965-1-git-send-email-lenb@kernel.org> Message-Id: <63f0edfc0b7f8058f9d3f9b572615ec97ae011ba.1191992584.git.len.brown@intel.com> In-Reply-To: References: Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: Alexey Starikovskiy , Len Brown From: Alexey Starikovskiy Signed-off-by: Alexey Starikovskiy Signed-off-by: Len Brown --- drivers/acpi/video.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 83aa41c..8a60a3d 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -1636,9 +1636,20 @@ static int acpi_video_get_next_level(struct acpi_video_device *device, u32 level_current, u32 event) { - int min, max, min_above, max_below, i, l; + int min, max, min_above, max_below, i, l, delta = 255; max = max_below = 0; min = min_above = 255; + /* Find closest level to level_current */ + for (i = 0; i < device->brightness->count; i++) { + l = device->brightness->levels[i]; + if (abs(l - level_current) < abs(delta)) { + delta = l - level_current; + if (!delta) + break; + } + } + /* Ajust level_current to closest available level */ + level_current += delta; for (i = 0; i < device->brightness->count; i++) { l = device->brightness->levels[i]; if (l < min) -- 1.5.3.4.206.g58ba4