From patchwork Tue Dec 7 07:29:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hector Martin X-Patchwork-Id: 12661211 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 CBED8C433EF for ; Tue, 7 Dec 2021 07:31:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2FD128BBA8; Tue, 7 Dec 2021 07:31:05 +0000 (UTC) Received: from mail.marcansoft.com (marcansoft.com [IPv6:2a01:298:fe:f::2]) by gabe.freedesktop.org (Postfix) with ESMTPS id F20DC8BBA8 for ; Tue, 7 Dec 2021 07:31:02 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: hector@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id 479C6423BD; Tue, 7 Dec 2021 07:30:57 +0000 (UTC) From: Hector Martin To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , Rob Herring , Hans de Goede Subject: [PATCH v2 2/3] drm/format-helper: Add drm_fb_xrgb8888_to_xrgb2101010_toio() Date: Tue, 7 Dec 2021 16:29:42 +0900 Message-Id: <20211207072943.121961-3-marcan@marcan.st> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211207072943.121961-1-marcan@marcan.st> References: <20211207072943.121961-1-marcan@marcan.st> 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: Hector Martin , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Javier Martinez Canillas , Alyssa Rosenzweig Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Add XRGB8888 emulation support for devices that can only do XRGB2101010. This is chiefly useful for simpledrm on Apple devices where the bootloader-provided framebuffer is 10-bit. Signed-off-by: Hector Martin --- drivers/gpu/drm/drm_format_helper.c | 62 +++++++++++++++++++++++++++++ include/drm/drm_format_helper.h | 3 ++ 2 files changed, 65 insertions(+) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index dbe3e830096e..edd611d3ab6a 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -409,6 +409,59 @@ void drm_fb_xrgb8888_to_rgb888_toio(void __iomem *dst, unsigned int dst_pitch, } EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_toio); +static void drm_fb_xrgb8888_to_xrgb2101010_line(u32 *dbuf, const u32 *sbuf, + unsigned int pixels) +{ + unsigned int x; + + for (x = 0; x < pixels; x++) { + *dbuf++ = ((sbuf[x] & 0x000000FF) << 2) | + ((sbuf[x] & 0x0000FF00) << 4) | + ((sbuf[x] & 0x00FF0000) << 6); + } +} + +/** + * drm_fb_xrgb8888_to_xrgb2101010_toio - Convert XRGB8888 to XRGB2101010 clip + * buffer + * @dst: XRGB2101010 destination buffer (iomem) + * @dst_pitch: Number of bytes between two consecutive scanlines within dst + * @vaddr: XRGB8888 source buffer + * @fb: DRM framebuffer + * @clip: Clip rectangle area to copy + * + * Drivers can use this function for XRGB2101010 devices that don't natively + * support XRGB8888. + */ +void drm_fb_xrgb8888_to_xrgb2101010_toio(void __iomem *dst, + unsigned int dst_pitch, const void *vaddr, + const struct drm_framebuffer *fb, + const struct drm_rect *clip) +{ + size_t linepixels = clip->x2 - clip->x1; + size_t dst_len = linepixels * sizeof(u32); + unsigned y, lines = clip->y2 - clip->y1; + void *dbuf; + + if (!dst_pitch) + dst_pitch = dst_len; + + dbuf = kmalloc(dst_len, GFP_KERNEL); + if (!dbuf) + return; + + vaddr += clip_offset(clip, fb->pitches[0], sizeof(u32)); + for (y = 0; y < lines; y++) { + drm_fb_xrgb8888_to_xrgb2101010_line(dbuf, vaddr, linepixels); + memcpy_toio(dst, dbuf, dst_len); + vaddr += fb->pitches[0]; + dst += dst_pitch; + } + + kfree(dbuf); +} +EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010_toio); + /** * drm_fb_xrgb8888_to_gray8 - Convert XRGB8888 to grayscale * @dst: 8-bit grayscale destination buffer @@ -500,6 +553,10 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for fb_format = DRM_FORMAT_XRGB8888; if (dst_format == DRM_FORMAT_ARGB8888) dst_format = DRM_FORMAT_XRGB8888; + if (fb_format == DRM_FORMAT_ARGB2101010) + fb_format = DRM_FORMAT_XRGB2101010; + if (dst_format == DRM_FORMAT_ARGB2101010) + dst_format = DRM_FORMAT_XRGB2101010; if (dst_format == fb_format) { drm_fb_memcpy_toio(dst, dst_pitch, vmap, fb, clip); @@ -515,6 +572,11 @@ int drm_fb_blit_toio(void __iomem *dst, unsigned int dst_pitch, uint32_t dst_for drm_fb_xrgb8888_to_rgb888_toio(dst, dst_pitch, vmap, fb, clip); return 0; } + } else if (dst_format == DRM_FORMAT_XRGB2101010) { + if (fb_format == DRM_FORMAT_XRGB8888) { + drm_fb_xrgb8888_to_xrgb2101010_toio(dst, dst_pitch, vmap, fb, clip); + return 0; + } } return -EINVAL; diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h index 97e4c3223af3..b30ed5de0a33 100644 --- a/include/drm/drm_format_helper.h +++ b/include/drm/drm_format_helper.h @@ -33,6 +33,9 @@ void drm_fb_xrgb8888_to_rgb888(void *dst, unsigned int dst_pitch, const void *sr void drm_fb_xrgb8888_to_rgb888_toio(void __iomem *dst, unsigned int dst_pitch, const void *vaddr, const struct drm_framebuffer *fb, const struct drm_rect *clip); +void drm_fb_xrgb8888_to_xrgb2101010_toio(void __iomem *dst, unsigned int dst_pitch, + const void *vaddr, const struct drm_framebuffer *fb, + const struct drm_rect *clip); void drm_fb_xrgb8888_to_gray8(void *dst, unsigned int dst_pitch, const void *vaddr, const struct drm_framebuffer *fb, const struct drm_rect *clip);