From patchwork Fri Jul 8 18:21:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 589265 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32467CCA482 for ; Fri, 8 Jul 2022 18:21:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239362AbiGHSVz (ORCPT ); Fri, 8 Jul 2022 14:21:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239210AbiGHSVf (ORCPT ); Fri, 8 Jul 2022 14:21:35 -0400 Received: from baptiste.telenet-ops.be (baptiste.telenet-ops.be [IPv6:2a02:1800:120:4::f00:13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6C33C82391 for ; Fri, 8 Jul 2022 11:21:32 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by baptiste.telenet-ops.be with bizsmtp id siMU270024C55Sk01iMUmx; Fri, 08 Jul 2022 20:21:30 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1o9sbX-002fJg-CX; Fri, 08 Jul 2022 20:21:27 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1o9sbW-00BtNW-MT; Fri, 08 Jul 2022 20:21:26 +0200 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , =?utf-8?q?Noralf_Tr=C3=B8nnes?= , Gerd Hoffmann Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 1/3] drm/fourcc: Add missing big-endian XRGB1555 and RGB565 formats Date: Fri, 8 Jul 2022 20:21:07 +0200 Message-Id: <0744671ac096a12f0d538906bd324efa71b11400.1657300532.git.geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org As of commit eae06120f1974e1a ("drm: refuse ADDFB2 ioctl for broken bigendian drivers"), drivers must set the quirk_addfb_prefer_host_byte_order quirk to make the drm_mode_addfb() compat code work correctly on big-endian machines. While that works fine for big-endian XRGB8888 and ARGB8888, which are mapped to the existing little-endian BGRX8888 and BGRA8888 formats, it does not work for big-endian XRGB1555 and RGB565, as the latter are not listed in the format database. Fix this by adding the missing formats. Limit this to big-endian platforms, as there is currently no need to support these formats on little-endian platforms. Fixes: 6960e6da9cec3f66 ("drm: fix drm_mode_addfb() on big endian machines.") Signed-off-by: Geert Uytterhoeven --- Cirrus is the only driver setting quirk_addfb_prefer_host_byte_order and supporting RGB565 or XRGB1555, but no one tried that on big-endian? Cirrus does not support DRM_FORMAT_RGB565 | DRM_FORMAT_BIG_ENDIAN in cirrus_fb_create, so you cannot get a graphical text console. Do we need these definitions on little-endian platforms, too? Would it be better to use "DRM_FORMAT_{XRGB1555,RGB565} | DRM_FORMAT_BIG_ENDIAN" instead of "DRM_FORMAT_HOST_{XRGB1555,RGB565}" in formats[]? Alternative, callers could filter out the DRM_FORMAT_BIG_ENDIAN flag when calling {,__}drm_format_info(). Advantages: - No need to have separate entries with DRM_FORMAT_BIG_ENDIAN set. Disadvantages: - {,__}drm_format_info() returns a pointer to a const object, whose .format field won't have the DRM_FORMAT_BIG_ENDIAN flag set, complicating callers, - All callers need to be updated, - It is difficult to know which big-endian formats are really supported, especially as only a few are needed. --- drivers/gpu/drm/drm_fourcc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index e09331bb3bc73f21..16a854c9e07fa4b0 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -190,6 +190,10 @@ const struct drm_format_info *__drm_format_info(u32 format) { .format = DRM_FORMAT_BGRA5551, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1, .has_alpha = true }, { .format = DRM_FORMAT_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_BGR565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, +#ifdef __BIG_ENDIAN + { .format = DRM_FORMAT_HOST_XRGB1555, .depth = 15, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, + { .format = DRM_FORMAT_HOST_RGB565, .depth = 16, .num_planes = 1, .cpp = { 2, 0, 0 }, .hsub = 1, .vsub = 1 }, +#endif { .format = DRM_FORMAT_RGB888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_BGR888, .depth = 24, .num_planes = 1, .cpp = { 3, 0, 0 }, .hsub = 1, .vsub = 1 }, { .format = DRM_FORMAT_XRGB8888, .depth = 24, .num_planes = 1, .cpp = { 4, 0, 0 }, .hsub = 1, .vsub = 1 }, From patchwork Fri Jul 8 18:21:08 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 588742 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DBA75C433EF for ; Fri, 8 Jul 2022 18:21:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239358AbiGHSVy (ORCPT ); Fri, 8 Jul 2022 14:21:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239213AbiGHSVf (ORCPT ); Fri, 8 Jul 2022 14:21:35 -0400 Received: from andre.telenet-ops.be (andre.telenet-ops.be [IPv6:2a02:1800:120:4::f00:15]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6CC7882392 for ; Fri, 8 Jul 2022 11:21:32 -0700 (PDT) Received: from ramsan.of.borg ([84.195.186.194]) by andre.telenet-ops.be with bizsmtp id siMT2700L4C55Sk01iMTgc; Fri, 08 Jul 2022 20:21:30 +0200 Received: from rox.of.borg ([192.168.97.57]) by ramsan.of.borg with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1o9sbX-002fJh-63; Fri, 08 Jul 2022 20:21:27 +0200 Received: from geert by rox.of.borg with local (Exim 4.93) (envelope-from ) id 1o9sbW-00BtNd-OO; Fri, 08 Jul 2022 20:21:26 +0200 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , =?utf-8?q?Noralf_Tr=C3=B8nnes?= , Gerd Hoffmann Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 2/3] drm/format-helper: Fix endianness in drm_fb_*_to_*() conversion helpers Date: Fri, 8 Jul 2022 20:21:08 +0200 Message-Id: <33f390d3bae2c5a45c0050097dc95f2e17644f2f.1657300532.git.geert@linux-m68k.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org DRM formats are defined to be little-endian, unless the DRM_FORMAT_BIG_ENDIAN flag is set. Hence when converting from one format to another, multi-byte pixel values loaded from memory must be converted from little-endian to host-endian. Conversely, multi-byte pixel values written to memory must be converted from host-endian to little-endian. Currently only drm_fb_xrgb8888_to_rgb332_line() includes endianness handling. Fix this by adding endianness handling to all conversion functions that process multi-byte pixel values. Note that the conversion to RGB565 is special, as there are two versions: with and without byteswapping of the RGB565 pixel data. Signed-off-by: Geert Uytterhoeven --- Tested with WIP atari_drm, which supports native big-endian RGB565. Notes: - Most of these are used only by GUD or simpledrm (the latter through drm_fb_blit_toio()). Interestingly, drm_fb_xrgb8888_to_rgb332() was introduced for GUD, and always had correct endiannes handling... - drm_fb_xrgb8888_to_gray8() is also used by st7586.c. --- drivers/gpu/drm/drm_format_helper.c | 80 +++++++++++++++++------------ 1 file changed, 46 insertions(+), 34 deletions(-) diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index a3ccd8bc966fd816..c6182b5de78b0bd8 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -279,14 +279,16 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb332); static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels) { u16 *dbuf16 = dbuf; - const u32 *sbuf32 = sbuf; + const __le32 *sbuf32 = sbuf; unsigned int x; u16 val16; + u32 pix; for (x = 0; x < pixels; x++) { - val16 = ((sbuf32[x] & 0x00F80000) >> 8) | - ((sbuf32[x] & 0x0000FC00) >> 5) | - ((sbuf32[x] & 0x000000F8) >> 3); + pix = le32_to_cpu(sbuf32[x]); + val16 = ((pix & 0x00F80000) >> 8) | + ((pix & 0x0000FC00) >> 5) | + ((pix & 0x000000F8) >> 3); dbuf16[x] = val16; } } @@ -295,14 +297,16 @@ static void drm_fb_xrgb8888_to_rgb565_swab_line(void *dbuf, const void *sbuf, unsigned int pixels) { u16 *dbuf16 = dbuf; - const u32 *sbuf32 = sbuf; + const __le32 *sbuf32 = sbuf; unsigned int x; u16 val16; + u32 pix; for (x = 0; x < pixels; x++) { - val16 = ((sbuf32[x] & 0x00F80000) >> 8) | - ((sbuf32[x] & 0x0000FC00) >> 5) | - ((sbuf32[x] & 0x000000F8) >> 3); + pix = le32_to_cpu(sbuf32[x]); + val16 = ((pix & 0x00F80000) >> 8) | + ((pix & 0x0000FC00) >> 5) | + ((pix & 0x000000F8) >> 3); dbuf16[x] = swab16(val16); } } @@ -360,13 +364,15 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb565_toio); static void drm_fb_xrgb8888_to_rgb888_line(void *dbuf, const void *sbuf, unsigned int pixels) { u8 *dbuf8 = dbuf; - const u32 *sbuf32 = sbuf; + const __le32 *sbuf32 = sbuf; unsigned int x; + u32 pix; for (x = 0; x < pixels; x++) { - *dbuf8++ = (sbuf32[x] & 0x000000FF) >> 0; - *dbuf8++ = (sbuf32[x] & 0x0000FF00) >> 8; - *dbuf8++ = (sbuf32[x] & 0x00FF0000) >> 16; + pix = le32_to_cpu(sbuf32[x]); + *dbuf8++ = (pix & 0x000000FF) >> 0; + *dbuf8++ = (pix & 0x0000FF00) >> 8; + *dbuf8++ = (pix & 0x00FF0000) >> 16; } } @@ -410,17 +416,19 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb888_toio); static void drm_fb_rgb565_to_xrgb8888_line(void *dbuf, const void *sbuf, unsigned int pixels) { - u32 *dbuf32 = dbuf; - const u16 *sbuf16 = sbuf; + __le32 *dbuf32 = dbuf; + const __le16 *sbuf16 = sbuf; unsigned int x; - for (x = 0; x < pixels; x++, ++sbuf16, ++dbuf32) { - u32 val32 = ((*sbuf16 & 0xf800) << 8) | - ((*sbuf16 & 0x07e0) << 5) | - ((*sbuf16 & 0x001f) << 3); - *dbuf32 = 0xff000000 | val32 | - ((val32 >> 3) & 0x00070007) | - ((val32 >> 2) & 0x00000300); + for (x = 0; x < pixels; x++) { + u16 val16 = le16_to_cpu(sbuf16[x]); + u32 val32 = ((val16 & 0xf800) << 8) | + ((val16 & 0x07e0) << 5) | + ((val16 & 0x001f) << 3); + val32 = 0xff000000 | val32 | + ((val32 >> 3) & 0x00070007) | + ((val32 >> 2) & 0x00000300); + dbuf32[x] = cpu_to_le32(val32); } } @@ -434,7 +442,7 @@ static void drm_fb_rgb565_to_xrgb8888_toio(void __iomem *dst, unsigned int dst_p static void drm_fb_rgb888_to_xrgb8888_line(void *dbuf, const void *sbuf, unsigned int pixels) { - u32 *dbuf32 = dbuf; + __le32 *dbuf32 = dbuf; const u8 *sbuf8 = sbuf; unsigned int x; @@ -442,7 +450,8 @@ static void drm_fb_rgb888_to_xrgb8888_line(void *dbuf, const void *sbuf, unsigne u8 r = *sbuf8++; u8 g = *sbuf8++; u8 b = *sbuf8++; - *dbuf32++ = 0xff000000 | (r << 16) | (g << 8) | b; + u32 pix = 0xff000000 | (r << 16) | (g << 8) | b; + dbuf32[x] = cpu_to_le32(pix); } } @@ -456,16 +465,19 @@ static void drm_fb_rgb888_to_xrgb8888_toio(void __iomem *dst, unsigned int dst_p static void drm_fb_xrgb8888_to_xrgb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels) { - u32 *dbuf32 = dbuf; - const u32 *sbuf32 = sbuf; + __le32 *dbuf32 = dbuf; + const __le32 *sbuf32 = sbuf; unsigned int x; u32 val32; + u32 pix; for (x = 0; x < pixels; x++) { - val32 = ((sbuf32[x] & 0x000000FF) << 2) | - ((sbuf32[x] & 0x0000FF00) << 4) | - ((sbuf32[x] & 0x00FF0000) << 6); - *dbuf32++ = val32 | ((val32 >> 8) & 0x00300C03); + pix = le32_to_cpu(sbuf32[x]); + val32 = ((pix & 0x000000FF) << 2) | + ((pix & 0x0000FF00) << 4) | + ((pix & 0x00FF0000) << 6); + pix = val32 | ((val32 >> 8) & 0x00300C03); + *dbuf32++ = cpu_to_le32(pix); } } @@ -494,17 +506,17 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010_toio); static void drm_fb_xrgb8888_to_gray8_line(void *dbuf, const void *sbuf, unsigned int pixels) { u8 *dbuf8 = dbuf; - const u32 *sbuf32 = sbuf; + const __le32 *sbuf32 = sbuf; unsigned int x; for (x = 0; x < pixels; x++) { - u8 r = (*sbuf32 & 0x00ff0000) >> 16; - u8 g = (*sbuf32 & 0x0000ff00) >> 8; - u8 b = *sbuf32 & 0x000000ff; + u32 pix = le32_to_cpu(sbuf32[x]); + u8 r = (pix & 0x00ff0000) >> 16; + u8 g = (pix & 0x0000ff00) >> 8; + u8 b = pix & 0x000000ff; /* ITU BT.601: Y = 0.299 R + 0.587 G + 0.114 B */ *dbuf8++ = (3 * r + 6 * g + b) / 10; - sbuf32++; } } From patchwork Fri Jul 8 18:21:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 589266 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AB668CCA47F for ; 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Fri, 08 Jul 2022 20:21:26 +0200 From: Geert Uytterhoeven To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Daniel Vetter , =?utf-8?q?Noralf_Tr=C3=B8nnes?= , Gerd Hoffmann Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH 3/3] drm/gud: Fix endianness in gud_xrgb8888_to_color() helper Date: Fri, 8 Jul 2022 20:21:09 +0200 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org DRM formats are defined to be little-endian, unless the DRM_FORMAT_BIG_ENDIAN flag is set. Hence when converting from one format to another, multi-byte pixel values loaded from memory must be converted from little-endian to host-endian. Conversely, multi-byte pixel values written to memory must be converted from host-endian to little-endian. Currently only drm_fb_xrgb8888_to_rgb332_line() includes endianness handling. Fix gud_xrgb8888_to_color() on big-endian platforms by adding the missing endianness handling. Signed-off-by: Geert Uytterhoeven --- Compile-tested only. Interestingly, drm_fb_xrgb8888_to_rgb332() was introduced for GUD, and always had correct endiannes handling... --- drivers/gpu/drm/gud/gud_pipe.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/gud/gud_pipe.c b/drivers/gpu/drm/gud/gud_pipe.c index 4873f9799f412e04..d42592f6daab8b2a 100644 --- a/drivers/gpu/drm/gud/gud_pipe.c +++ b/drivers/gpu/drm/gud/gud_pipe.c @@ -105,7 +105,8 @@ static size_t gud_xrgb8888_to_color(u8 *dst, const struct drm_format_info *forma unsigned int bits_per_pixel = 8 / block_width; u8 r, g, b, pix, *block = dst; /* Assign to silence compiler warning */ unsigned int x, y, width; - u32 *pix32; + __le32 *sbuf32; + u32 pix32; size_t len; /* Start on a byte boundary */ @@ -114,8 +115,8 @@ static size_t gud_xrgb8888_to_color(u8 *dst, const struct drm_format_info *forma len = drm_format_info_min_pitch(format, 0, width) * drm_rect_height(rect); for (y = rect->y1; y < rect->y2; y++) { - pix32 = src + (y * fb->pitches[0]); - pix32 += rect->x1; + sbuf32 = src + (y * fb->pitches[0]); + sbuf32 += rect->x1; for (x = 0; x < width; x++) { unsigned int pixpos = x % block_width; /* within byte from the left */ @@ -126,9 +127,10 @@ static size_t gud_xrgb8888_to_color(u8 *dst, const struct drm_format_info *forma *block = 0; } - r = *pix32 >> 16; - g = *pix32 >> 8; - b = *pix32++; + pix32 = le32_to_cpu(*sbuf32++); + r = pix32 >> 16; + g = pix32 >> 8; + b = pix32; switch (format->format) { case GUD_DRM_FORMAT_XRGB1111: