From patchwork Mon Sep 5 19:08:11 2022 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: 12966453 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 7341CECAAD3 for ; Mon, 5 Sep 2022 19:09:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5610210E4B9; Mon, 5 Sep 2022 19:09:08 +0000 (UTC) Received: from mail-ot1-x32d.google.com (mail-ot1-x32d.google.com [IPv6:2607:f8b0:4864:20::32d]) by gabe.freedesktop.org (Postfix) with ESMTPS id D688010E4B8 for ; Mon, 5 Sep 2022 19:08:59 +0000 (UTC) Received: by mail-ot1-x32d.google.com with SMTP id v2-20020a056830090200b006397457afecso6663666ott.13 for ; Mon, 05 Sep 2022 12:08:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=NWJhnUimVkxjF+4Gb04O1Spyhmg7+xfGLsFhVgz9iF0=; b=hobZc5/O5pgTpfEPWqEISoW3j0BlkWJ7buTWvPaFh5jp/Ib7kXYx+7Rgl1okbMEcS0 qwz+s/f46ZZC0SwpPevRMQLkWWYLnw6GNI8Gj9nTTyE9Lq7NBwXPI4RxsahWpb8rrHfc 6TylrpsD/JnCq19ZfoLZQYpNb1aYdtJJ3cZ/Hb72Z5C74nAsWUDCERGFOF0f0ruthcZ9 2nalj6rB3D/0ji8k0Bw5+JTpot/VueY+DEe8Cd6RymCVlKGvG8ysjSXZrTALQBfWYzmM 1rMRh2jdbBO416xc31wpBrozKIuf39PMfT/oTElEYB7CB1OkRy0631FR+3/V1RPk8d33 t3ZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=NWJhnUimVkxjF+4Gb04O1Spyhmg7+xfGLsFhVgz9iF0=; b=ezyIQxWNvOM/s0xYZnrjdI8ROzclEpB8kCbHnMcbpOimYBzrj7S0L7d6tT3uE0VQYX 8XSNRPnnxChfEia4tILIFnrJrEIPgoV5n1KoNWDO5zPCy2I3JneaGSqYVnys/G6aPIqW nHlcICGaz5i6kiOSqHpVmvTSVpc6THtCn9P0xPGgoQqgJVfAeoPVQf5eF1lxNh9Sc0as 482MwV1EJTX3chdZhN/LmTv7hy5ZygAyVNkFpiIA5o9y/QLMsVVmucvyY8sf2qSozdGm HzuDcLgL8utHFWb+LrwvBYhPooao3wuGTChHDPRfJ61CH62sPlvMl9ZGKAFTZcOD+hth tmcA== X-Gm-Message-State: ACgBeo1bSt9wW+WoMhHD2IFE0UQ7xg9OpneTeGr3GROdGsjBHX9UzdmX GJF2OGGtE1ObNvGkipKAp1F5UMiAJH4= X-Google-Smtp-Source: AA6agR7OLlAZPG+aZCd/XXuNFSP3cgcYryoDHuowOKPGnbHpX31K0JZADct44EJLptX4mFCAEf3FuA== X-Received: by 2002:a9d:5617:0:b0:639:4766:904f with SMTP id e23-20020a9d5617000000b006394766904fmr19692522oti.319.1662404939154; Mon, 05 Sep 2022 12:08:59 -0700 (PDT) Received: from localhost.localdomain ([2804:431:c7f4:21c0:3f1:e4fc:3866:255e]) by smtp.googlemail.com with ESMTPSA id z6-20020a4a9846000000b0044b61af8816sm3328465ooi.41.2022.09.05.12.08.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Sep 2022 12:08:58 -0700 (PDT) From: Igor Torrente To: rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, ppaalanen@gmail.com, tzimmermann@suse.de Subject: [PATCH v7 9/9] drm: vkms: Add support to the RGB565 format Date: Mon, 5 Sep 2022 16:08:11 -0300 Message-Id: <20220905190811.25024-10-igormtorrente@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220905190811.25024-1-igormtorrente@gmail.com> References: <20220905190811.25024-1-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: , Cc: hamohammed.sa@gmail.com, airlied@linux.ie, leandro.ribeiro@collabora.com, Melissa Wen , dri-devel@lists.freedesktop.org, tales.aparecida@gmail.com, ~lkcamp/patches@lists.sr.ht, Igor Torrente Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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. V3: Adapt the handlers to the new format introduced in patch 7 V3. V5: Minor improvements V6: Minor improvements (Pekka Paalanen) Reviewed-by: Melissa Wen Signed-off-by: Igor Torrente --- drivers/gpu/drm/vkms/vkms_formats.c | 70 +++++++++++++++++++++++++++ drivers/gpu/drm/vkms/vkms_plane.c | 6 ++- drivers/gpu/drm/vkms/vkms_writeback.c | 3 +- 3 files changed, 76 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c index b583da7fe0b1..30bf8e6660ad 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.c +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -5,6 +5,23 @@ #include "vkms_formats.h" +/* The following macros help doing fixed point arithmetic. */ +/* + * With Fixed-Point 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 SHIFT 15 + +#define INT_TO_FIXED(a) ((a) << SHIFT) +#define FIXED_MUL(a, b) ((s32)(((s64)(a) * (b)) >> SHIFT)) +#define FIXED_DIV(a, b) ((s32)(((s64)(a) << SHIFT) / (b))) +/* This macro converts a fixed point number to int, and round half up it */ +#define FIXED_TO_INT_ROUND(a) (((a) + (1 << (SHIFT - 1))) >> SHIFT) +#define INT_TO_FIXED_DIV(a, b) (FIXED_DIV(INT_TO_FIXED(a), INT_TO_FIXED(b))) +#define INT_TO_FIXED_DIV(a, b) (FIXED_DIV(INT_TO_FIXED(a), INT_TO_FIXED(b))) + static size_t pixel_offset(const struct vkms_frame_info *frame_info, int x, int y) { return frame_info->offset + (y * frame_info->pitch) @@ -112,6 +129,30 @@ static void XRGB16161616_to_argb_u16(struct line_buffer *stage_buffer, } } +static void RGB565_to_argb_u16(struct line_buffer *stage_buffer, + const struct vkms_frame_info *frame_info, int y) +{ + struct pixel_argb_u16 *out_pixels = stage_buffer->pixels; + u16 *src_pixels = get_packed_src_addr(frame_info, y); + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + stage_buffer->n_pixels); + + s32 fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31); + s32 fp_g_ratio = INT_TO_FIXED_DIV(65535, 63); + + for (size_t x = 0; x < x_limit; x++, src_pixels++) { + u16 rgb_565 = le16_to_cpu(*src_pixels); + s32 fp_r = INT_TO_FIXED((rgb_565 >> 11) & 0x1f); + s32 fp_g = INT_TO_FIXED((rgb_565 >> 5) & 0x3f); + s32 fp_b = INT_TO_FIXED(rgb_565 & 0x1f); + + out_pixels[x].a = (u16)0xffff; + out_pixels[x].r = FIXED_TO_INT_ROUND(FIXED_MUL(fp_r, fp_rb_ratio)); + out_pixels[x].g = FIXED_TO_INT_ROUND(FIXED_MUL(fp_g, fp_g_ratio)); + out_pixels[x].b = FIXED_TO_INT_ROUND(FIXED_MUL(fp_b, fp_rb_ratio)); + } +} + /* * The following functions take an line of argb_u16 pixels from the @@ -199,6 +240,31 @@ static void argb_u16_to_XRGB16161616(struct vkms_frame_info *frame_info, } } +static void argb_u16_to_RGB565(struct vkms_frame_info *frame_info, + const struct line_buffer *src_buffer, int y) +{ + int x_dst = frame_info->dst.x1; + u16 *dst_pixels = packed_pixels_addr(frame_info, x_dst, y); + struct pixel_argb_u16 *in_pixels = src_buffer->pixels; + int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + src_buffer->n_pixels); + + s32 fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31); + s32 fp_g_ratio = INT_TO_FIXED_DIV(65535, 63); + + for (size_t x = 0; x < x_limit; x++, dst_pixels++) { + s32 fp_r = INT_TO_FIXED(in_pixels[x].r); + s32 fp_g = INT_TO_FIXED(in_pixels[x].g); + s32 fp_b = INT_TO_FIXED(in_pixels[x].b); + + u16 r = FIXED_TO_INT_ROUND(FIXED_DIV(fp_r, fp_rb_ratio)); + u16 g = FIXED_TO_INT_ROUND(FIXED_DIV(fp_g, fp_g_ratio)); + u16 b = FIXED_TO_INT_ROUND(FIXED_DIV(fp_b, fp_rb_ratio)); + + *dst_pixels = cpu_to_le16(r << 11 | g << 5 | b); + } +} + void *get_frame_to_line_function(u32 format) { switch (format) { @@ -210,6 +276,8 @@ void *get_frame_to_line_function(u32 format) return &ARGB16161616_to_argb_u16; case DRM_FORMAT_XRGB16161616: return &XRGB16161616_to_argb_u16; + case DRM_FORMAT_RGB565: + return &RGB565_to_argb_u16; default: return NULL; } @@ -226,6 +294,8 @@ void *get_line_to_frame_function(u32 format) return &argb_u16_to_ARGB16161616; case DRM_FORMAT_XRGB16161616: return &argb_u16_to_XRGB16161616; + case DRM_FORMAT_RGB565: + return &argb_u16_to_RGB565; default: return NULL; } diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c index f823fe315de6..f4319066adcc 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 16feea884646..84a51cd281b9 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -17,7 +17,8 @@ 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 = {