From patchwork Mon Oct 25 19:34:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Matheus Andrade Torrente X-Patchwork-Id: 12582717 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2CC22C4332F for ; Mon, 25 Oct 2021 19:37:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 018D4610D2 for ; Mon, 25 Oct 2021 19:37:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 018D4610D2 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 31EBF89700; Mon, 25 Oct 2021 19:37:23 +0000 (UTC) Received: from mail-ua1-x92d.google.com (mail-ua1-x92d.google.com [IPv6:2607:f8b0:4864:20::92d]) by gabe.freedesktop.org (Postfix) with ESMTPS id DDC3D6E20B for ; Mon, 25 Oct 2021 19:37:19 +0000 (UTC) Received: by mail-ua1-x92d.google.com with SMTP id x3so5195341uar.13 for ; Mon, 25 Oct 2021 12:37:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=BpzB9psURBvhNvmXpPEQXb13hz7OsGQ74tdDzFCqOD4=; b=TlSD85XJaIoNMI754/tPjxLA+O0N3S/VCODwSchKarLwtiTo03kW4AmLhnk5iD2zNK zmCvzZ1gF/oLaXSDx6vDGu9ee/xWp+7RpUFHQ1K/F0NiXHs2M8H8ND+qAZVVG8jg905U uzgMdI34JcJebE+Uawo+i6Digl7lAwkSI9yj99lCWP8k1vtDx4VMyExQlrosvtttJfV6 4rzcMQsteB8VmzVwvsEQv+2Jsy22xAHd7/t8cmcHoUmcxlKkj22hv8DCgzpBcevol+oM Tyx5pVZUG9soOmIe9ZJhWda0UJLPRGz2lFcguEOYaNRLzD0GKnLIiXWeRAAAo4KIAntz o8Ig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=BpzB9psURBvhNvmXpPEQXb13hz7OsGQ74tdDzFCqOD4=; b=lGvuBgJjsZqtHxqVy4OoPTeFZABhvwWGgS/7FH9akVnb+jMjyhIrMkPSoCttilyUgr QaoDfjzNPx3vN5Hp97MG30ITgGthICo29cgvY0tjkVFfRwqMDhdnGcBBnLldykN12Xh6 QDSwSiGLKyI/pb/5tMNhrITOSjpZfmvspi85ZAT6srjtMjVdpbImqvjSOh22JqzDUHRI tviOgMf6dV4b8ZUEOFRKCc142eeKcNt1SxCBdvwFsd+Pi2L2AEJM7lQVJ4tFv9mawTLY XMYGsf3Lp3FZS8BHMUzTUK1rKpR7iVTVwg/g0qKhN7TenUzpvxhjUvaISWYOQwvIYJdZ sH+g== X-Gm-Message-State: AOAM530AmPnQA87UkaRPtlfEmrKuUpmgAj5k19ZCP/y99Ca3RcN1ssm5 CAm2hMNLQumJayPDUSwkpxfFmrsfkG8= X-Google-Smtp-Source: ABdhPJwguy3hP8tfm46E5ZJSruQN0IVWoHzihcDSez+Oi1xVPR3EKy00uVHhy/C7m5Uz+q6nyuKDow== X-Received: by 2002:a67:d996:: with SMTP id u22mr17493928vsj.12.1635190638954; Mon, 25 Oct 2021 12:37:18 -0700 (PDT) Received: from localhost.localdomain ([2804:431:c7f4:5469:b11e:67b8:49d2:1744]) by smtp.googlemail.com with ESMTPSA id k1sm10722013uaq.0.2021.10.25.12.37.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Oct 2021 12:37:18 -0700 (PDT) From: Igor Torrente To: rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, ppaalanen@gmail.com, tzimmermann@suse.de Cc: Igor Torrente , hamohammed.sa@gmail.com, daniel@ffwll.ch, airlied@linux.ie, contact@emersion.fr, leandro.ribeiro@collabora.com, dri-devel@lists.freedesktop.org Subject: [PATCH v2 8/8] drm: vkms: Add support the RGB565 format Date: Mon, 25 Oct 2021 16:34:44 -0300 Message-Id: <20211025193444.131207-9-igormtorrente@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211025193444.131207-1-igormtorrente@gmail.com> References: <20211025193444.131207-1-igormtorrente@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Adds this common format to vkms. This commit also adds new helper macros to deal with fixed-point arithmetic. It was done to improve the precision of the conversion to ARGB16161616 since the "conversion ratio" is not an integer. Signed-off-by: Igor Torrente --- drivers/gpu/drm/vkms/vkms_composer.c | 4 ++ drivers/gpu/drm/vkms/vkms_formats.h | 72 +++++++++++++++++++++++++++ drivers/gpu/drm/vkms/vkms_plane.c | 6 ++- drivers/gpu/drm/vkms/vkms_writeback.c | 3 +- 4 files changed, 82 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index f16fcfc88cea..57ec82839a89 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -166,6 +166,8 @@ static void ((*get_line_fmt_transform_function(u32 format)) return &get_ARGB16161616; else if (format == DRM_FORMAT_XRGB16161616) return &XRGB16161616_to_ARGB16161616; + else if (format == DRM_FORMAT_RGB565) + return &RGB565_to_ARGB16161616; else return &XRGB8888_to_ARGB16161616; } @@ -179,6 +181,8 @@ static void ((*get_output_line_function(u32 format)) return &convert_to_ARGB16161616; else if (format == DRM_FORMAT_XRGB16161616) return &convert_to_XRGB16161616; + else if (format == DRM_FORMAT_RGB565) + return &convert_to_RGB565; else return &convert_to_XRGB8888; } diff --git a/drivers/gpu/drm/vkms/vkms_formats.h b/drivers/gpu/drm/vkms/vkms_formats.h index aa433edd00bd..1e2db1a844aa 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.h +++ b/drivers/gpu/drm/vkms/vkms_formats.h @@ -8,6 +8,26 @@ #define pixel_offset(composer, x, y) \ ((composer)->offset + ((y) * (composer)->pitch) + ((x) * (composer)->cpp)) +/* + * FP stands for _Fixed Point_ and **not** _Float Point_ + * LF stands for Long Float (i.e. double) + * The following macros help doing fixed point arithmetic. + */ +/* + * With FP scale 15 we have 17 and 15 bits of integer and fractional parts + * respectively. + * | 0000 0000 0000 0000 0.000 0000 0000 0000 | + * 31 0 + */ +#define FP_SCALE 15 + +#define LF_TO_FP(a) ((a) * (u64)(1 << FP_SCALE)) +#define INT_TO_FP(a) ((a) << FP_SCALE) +#define FP_MUL(a, b) ((s32)(((s64)(a) * (b)) >> FP_SCALE)) +#define FP_DIV(a, b) ((s32)(((s64)(a) << FP_SCALE) / (b))) +/* This macro converts a fixed point number to int, and round half up it */ +#define FP_TO_INT_ROUND_UP(a) (((a) + (1 << (FP_SCALE - 1))) >> FP_SCALE) + /* * packed_pixels_addr - Get the pointer to pixel of a given pair of coordinates * @@ -102,6 +122,35 @@ static void XRGB16161616_to_ARGB16161616(void *pixels_addr, int length, } } +static void RGB565_to_ARGB16161616(void *pixels_addr, int length, + u64 *line_buffer) +{ + __le16 *src_pixels = pixels_addr; + int i; + + for (i = 0; i < length; i++) { + u16 rgb_565 = le16_to_cpu(*src_pixels); + int fp_r = INT_TO_FP((rgb_565 >> 11) & 0x1f); + int fp_g = INT_TO_FP((rgb_565 >> 5) & 0x3f); + int fp_b = INT_TO_FP(rgb_565 & 0x1f); + + /* + * The magic constants is the "conversion ratio" and is calculated + * dividing 65535(2^16 - 1) by 31(2^5 -1) and 63(2^6 - 1) respectively. + */ + int fp_rb_ratio = LF_TO_FP(2114.032258065); + int fp_g_ratio = LF_TO_FP(1040.238095238); + + u64 r = FP_TO_INT_ROUND_UP(FP_MUL(fp_r, fp_rb_ratio)); + u64 g = FP_TO_INT_ROUND_UP(FP_MUL(fp_g, fp_g_ratio)); + u64 b = FP_TO_INT_ROUND_UP(FP_MUL(fp_b, fp_rb_ratio)); + + line_buffer[i] = 0xffffllu << 48 | r << 32 | g << 16 | b; + + src_pixels++; + } +} + /* * The following functions are used as blend operations. But unlike the * `alpha_blend`, these functions take an ARGB16161616 pixel from the @@ -177,4 +226,27 @@ static void convert_to_XRGB16161616(void *pixels_addr, int length, } } +static void convert_to_RGB565(void *pixels_addr, int length, + u64 *line_buffer) +{ + __le16 *dst_pixels = pixels_addr; + int i; + + for (i = 0; i < length; i++) { + int fp_r = INT_TO_FP((line_buffer[i] >> 32) & 0xffff); + int fp_g = INT_TO_FP((line_buffer[i] >> 16) & 0xffff); + int fp_b = INT_TO_FP(line_buffer[i] & 0xffffllu); + + int fp_rb_ratio = LF_TO_FP(2114.032258065); + int fp_g_ratio = LF_TO_FP(1040.238095238); + + u16 r = FP_TO_INT_ROUND_UP(FP_DIV(fp_r, fp_rb_ratio)); + u16 g = FP_TO_INT_ROUND_UP(FP_DIV(fp_g, fp_g_ratio)); + u16 b = FP_TO_INT_ROUND_UP(FP_DIV(fp_b, fp_rb_ratio)); + + *dst_pixels = cpu_to_le16(r << 11 | g << 5 | b); + dst_pixels++; + } +} + #endif /* _VKMS_FORMATS_H_ */ diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c index 516e48b38806..de250808aa39 100644 --- a/drivers/gpu/drm/vkms/vkms_plane.c +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -13,14 +13,16 @@ static const u32 vkms_formats[] = { DRM_FORMAT_XRGB8888, - DRM_FORMAT_XRGB16161616 + DRM_FORMAT_XRGB16161616, + DRM_FORMAT_RGB565 }; static const u32 vkms_plane_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888, DRM_FORMAT_XRGB16161616, - DRM_FORMAT_ARGB16161616 + DRM_FORMAT_ARGB16161616, + DRM_FORMAT_RGB565 }; static struct drm_plane_state * diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c index 0f7bb77f981e..11eb1be5a0fc 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -15,7 +15,8 @@ static const u32 vkms_wb_formats[] = { DRM_FORMAT_XRGB8888, DRM_FORMAT_XRGB16161616, - DRM_FORMAT_ARGB16161616 + DRM_FORMAT_ARGB16161616, + DRM_FORMAT_RGB565 }; static const struct drm_connector_funcs vkms_wb_connector_funcs = {