From patchwork Mon Apr 4 20:45:15 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: 12800680 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 56E41C433EF for ; Mon, 4 Apr 2022 20:46:06 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 915B510E4F5; Mon, 4 Apr 2022 20:46:05 +0000 (UTC) Received: from mail-qk1-x734.google.com (mail-qk1-x734.google.com [IPv6:2607:f8b0:4864:20::734]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6DD4210E4F5 for ; Mon, 4 Apr 2022 20:46:04 +0000 (UTC) Received: by mail-qk1-x734.google.com with SMTP id r127so8708619qke.13 for ; Mon, 04 Apr 2022 13:46:04 -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=/q4tJuWe4Rao8iLcsu8RrWKl1kjLSs/sDWmRRo4HVx8=; b=mG/wxO5HGBZm0oPAHUzMqijZF+wsDSDnHtTX5krnLcrBnLR/yb634ksppqYjiMAnaW tvj3y+X5f++aLfAbcMjd+f11c/LWvWj3g5U8t7cYK5XlsI9RGadi7UWBA6cK/B6c4l75 4JxIUiqev4Qhjudkq16oTOaUHDmcSKRvuvYv+LZKVCmQ668hA1eJIfhO+VxjDnOyUv9U TcZJqHvC0q4/0uayUo+uZon3XGo/cFJAGOdL8yfbNUn59KISLSIsKU2qIP6xv6x2YYIU hk+KeC9rbCSCty3xQm0XH2HEJmH1j2vF5IRiGeh0PffkDBnCGuYhVW3W32DPQPEM+MP5 Q/mQ== 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=/q4tJuWe4Rao8iLcsu8RrWKl1kjLSs/sDWmRRo4HVx8=; b=4+6QGlItV2P2u+iUbUUITGt9zMFd0Y3PsBCI9tSENCgUupbLom/8S/VDb41xDoVojj YMeVCV897CiqErKYts89d3wn/nONrtVYm7jTFuJWdTXyHNWItSP39SiO9ynFEgVlYluM irK24ZxyjQdcGYTWAHCWbCnak96i3rigZUI/+kcn4GiYy11H+XDaTPsI4DZAwqaioVCw x2wr1oVYJTtfDHCT64s2YukTBOUGdhwbfrYY+nSEq7gYJ4HYlduDjMLt9hrWf/kW7BAx xyClRlIn5wF/e8tdn1esFwh8OgL/hbB958GSjOEQCZyp+tuALWlnr2wUNcyKxhdfH+95 5R2g== X-Gm-Message-State: AOAM533RHh4dPN7jdWLh1HVE/Ed4iXQHeuLd5ZUKQWv/id7fSxTR6W87 s3ZiJYXJ6+Yddumnj8fSRL4= X-Google-Smtp-Source: ABdhPJxmOt4z41WEAqCW0Bzadq/9MRGVrYZVAC49ft6umxaDOHoSA8zEtRwImCbfCLJioHiW113DDg== X-Received: by 2002:a37:9a94:0:b0:67b:1ee6:a003 with SMTP id c142-20020a379a94000000b0067b1ee6a003mr68620qke.610.1649105163515; Mon, 04 Apr 2022 13:46:03 -0700 (PDT) Received: from localhost.localdomain ([2804:431:c7f4:7cc:26a1:e446:de76:c0b8]) by smtp.googlemail.com with ESMTPSA id m10-20020a05622a054a00b002eb965bbc3esm9630548qtx.93.2022.04.04.13.46.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Apr 2022 13:46:03 -0700 (PDT) From: Igor Torrente To: rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, ppaalanen@gmail.com, tzimmermann@suse.de Subject: [PATCH v5 9/9] drm: vkms: Add support to the RGB565 format Date: Mon, 4 Apr 2022 17:45:15 -0300 Message-Id: <20220404204515.42144-10-igormtorrente@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220404204515.42144-1-igormtorrente@gmail.com> References: <20220404204515.42144-1-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, 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" 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. V3: Adapt the handlers to the new format introduced in patch 7 V3. V5: Minor improvements 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 8d913fa7dbde..4af8b295f31e 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 FIXED_SCALE 15 + +#define INT_TO_FIXED(a) ((a) << FIXED_SCALE) +#define FIXED_MUL(a, b) ((s32)(((s64)(a) * (b)) >> FIXED_SCALE)) +#define FIXED_DIV(a, b) ((s32)(((s64)(a) << FIXED_SCALE) / (b))) +/* This macro converts a fixed point number to int, and round half up it */ +#define FIXED_TO_INT_ROUND(a) (((a) + (1 << (FIXED_SCALE - 1))) >> FIXED_SCALE) +/* Convert divisor and dividend to Fixed-Point and performs the division */ +#define INT_TO_FIXED_DIV(a, b) (FIXED_DIV(INT_TO_FIXED(a), INT_TO_FIXED(b))) + static int 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, x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), + stage_buffer->n_pixels); + + for (x = 0; x < x_limit; x++, src_pixels++) { + u16 rgb_565 = le16_to_cpu(*src_pixels); + int fp_r = INT_TO_FIXED((rgb_565 >> 11) & 0x1f); + int fp_g = INT_TO_FIXED((rgb_565 >> 5) & 0x3f); + int fp_b = INT_TO_FIXED(rgb_565 & 0x1f); + + int fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31); + int fp_g_ratio = INT_TO_FIXED_DIV(65535, 63); + + 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, 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); + + for (x = 0; x < x_limit; x++, dst_pixels++) { + int fp_r = INT_TO_FIXED(in_pixels[x].r); + int fp_g = INT_TO_FIXED(in_pixels[x].g); + int fp_b = INT_TO_FIXED(in_pixels[x].b); + + int fp_rb_ratio = INT_TO_FIXED_DIV(65535, 31); + int fp_g_ratio = INT_TO_FIXED_DIV(65535, 63); + + 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); + } +} + plane_format_transform_func get_plane_fmt_transform_function(u32 format) { if (format == DRM_FORMAT_ARGB8888) @@ -209,6 +275,8 @@ plane_format_transform_func get_plane_fmt_transform_function(u32 format) return &ARGB16161616_to_argb_u16; else if (format == DRM_FORMAT_XRGB16161616) return &XRGB16161616_to_argb_u16; + else if (format == DRM_FORMAT_RGB565) + return &RGB565_to_argb_u16; else return NULL; } @@ -223,6 +291,8 @@ wb_format_transform_func get_wb_fmt_transform_function(u32 format) return &argb_u16_to_ARGB16161616; else if (format == DRM_FORMAT_XRGB16161616) return &argb_u16_to_XRGB16161616; + else if (format == DRM_FORMAT_RGB565) + return &argb_u16_to_RGB565; else return NULL; } diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c index 60054a85204a..94a8e412886f 100644 --- a/drivers/gpu/drm/vkms/vkms_plane.c +++ b/drivers/gpu/drm/vkms/vkms_plane.c @@ -14,14 +14,16 @@ 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 cb63a5da9af1..98da7bee0f4b 100644 --- a/drivers/gpu/drm/vkms/vkms_writeback.c +++ b/drivers/gpu/drm/vkms/vkms_writeback.c @@ -16,7 +16,8 @@ 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 = {