From nobody Fri Dec 19 17:15:06 2025 Received: from relay1-d.mail.gandi.net (relay1-d.mail.gandi.net [217.70.183.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E83DD12FF78 for ; Tue, 9 Apr 2024 13:25:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.193 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712669155; cv=none; b=ASyy1p2GIHVyv1stKx8OX5ldHz1P2RlJ41E4WLvgMRXC/cuUM8fpB9eytcDhJtxEIGvN7jBkhc3LFX7OLJeH09JvCsesoxhI0Al2JcmTLftfr+QtgN9DT/N19F/T0YflXZ+2jLGX4x4dY+hawWtFO1dhY7fORvIBjJaFk7b/e38= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712669155; c=relaxed/simple; bh=bApw2fd9r1g4lEoqGsctmEAfSEELUERH7BXSO0MphVk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=sJO/oYczwmHB4lQxHPL6qvnpzPgoFDWBcheMlnuWVcDIFIn2LqUEmucdzb19U1DrSO/06FeX+HXoXJhHzjM03Ahu71A0jhsOmTPWFWki59VWcpR2zGxX5YzKrct4QPDBmzYQ8qgjmc+rufc1sPEygUs2t/g0TZoq9qykiYcSrLo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=K/gDMQMI; arc=none smtp.client-ip=217.70.183.193 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="K/gDMQMI" Received: by mail.gandi.net (Postfix) with ESMTPSA id 4EA95240015; Tue, 9 Apr 2024 13:25:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1712669151; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kKfCbAYW4rXkv6BYjOSiRSj9s8zIipInrp9O4l0hCbY=; b=K/gDMQMI8hHBUolMjC2j2IsjkAuByuRDABjU1YNOqAddjYjiWVKpDGvW6pbxYDngUdkoFp kZ12hJCKQBX3/YyndZWBr2qksJ4WHjpC0q/xz5yHaw9X2XGSfEn3b1fxnbNbDnMlJxQiyG ur1Q9Fn2VTpsYsqEDkoY9ujPCPa9L8ZYNCuq4paBhRDmUiO90yr1rZsjj4PEWzU8wG+SIT rUqyyTKRuKMLIYJ4LIa1ofXtmTcOt10zlXmMcM/JNRcz4JPSikLjx49B1INMMU4vKRTgXY ABVJsFT8ZpLuspbRvctUkm16TsZ94oEovs7dDBH5TDOCCtXVoVzF0rjFzAPe4A== From: Louis Chauvet Date: Tue, 09 Apr 2024 15:25:25 +0200 Subject: [PATCH v6 07/17] drm/vkms: Update pixels accessor to support packed and multi-plane formats. Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240409-yuv-v6-7-de1c5728fd70@bootlin.com> References: <20240409-yuv-v6-0-de1c5728fd70@bootlin.com> In-Reply-To: <20240409-yuv-v6-0-de1c5728fd70@bootlin.com> To: Rodrigo Siqueira , Melissa Wen , =?utf-8?q?Ma=C3=ADra_Canal?= , Haneen Mohammed , Daniel Vetter , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , rdunlap@infradead.org, arthurgrillo@riseup.net, Jonathan Corbet , pekka.paalanen@haloniitty.fi Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, jeremie.dautheribes@bootlin.com, miquel.raynal@bootlin.com, thomas.petazzoni@bootlin.com, seanpaul@google.com, marcheu@google.com, nicolejadeyee@google.com, Louis Chauvet X-Mailer: b4 0.14-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=8553; i=louis.chauvet@bootlin.com; h=from:subject:message-id; bh=bApw2fd9r1g4lEoqGsctmEAfSEELUERH7BXSO0MphVk=; b=owEBbQKS/ZANAwAIASCtLsZbECziAcsmYgBmFUHSRvR2iRWacX4xCp5eoJb2DHDjmafNduj0B +bJ+FSMKU6JAjMEAAEIAB0WIQRPj7g/vng8MQxQWQQgrS7GWxAs4gUCZhVB0gAKCRAgrS7GWxAs 4oSRD/4gdKNDr5TmX049zGT60VMfIxf9g8Ki9P2I7DeZA3LYPI4PLKaZe6cQcNW1YRTlcka4JsT W6r6TagWHo+SpCy+PQjDM6oHH2FzlAicvP2gUElLfjRHA7CH6jGY/wk7S7S2ds+LXC8oSJJSe0F 3ntkSsWc8aLL+7ctlu9Y2WqyFleCgFDJEVDtIq4aGB+6joFDRvasMDDZFHinzUkLXJUXwdhjXk9 jEekX/5V1wLhhuEEMQlMId/njoEPy+KPTKBboCE1ntiLZNj0e+jEhz/l8pt3Ea7TrkW5+IqyBjc N/P9bLxFmqcpFDsx40yfhRBNgXzjZqbHgrjv3DFm56TGWBOlkgIrvu1QbGT37SanM52g84iI9Km hnMJ2pOgek0VaX0DPyJ4XN/Kujiy4/qoN96VpYGM5pOXCdwXT/ZOWucx/CPuyEPvv8zilxNY2XU 8zZl2TaRYbvnl+Uy5m3dM2HWScmLfbJ306uGTinIZoxce7sbiGHVtzuK/1V0Z7nuuxQKtc/s9A3 PVcaPyxobrhdMyj+TCN3ZQfikbcJ4AJlA1XdwFSrO6wq+ejECtPMXXv7q2yw0tTuGYUBDSLL+iC gOdEhzTSFeajo16cD3fVELNgE29SuPpNfIxqlmOPVsOKCwIeuLNE2ac9PqZCE1qd9ZDaiQqcQYT b4YM+FOXKJtYF1w== X-Developer-Key: i=louis.chauvet@bootlin.com; a=openpgp; fpr=8B7104AE9A272D6693F527F2EC1883F55E0B40A5 X-GND-Sasl: louis.chauvet@bootlin.com Introduce the usage of block_h/block_w to compute the offset and the pointer of a pixel. The previous implementation was specialized for planes with block_h =3D=3D block_w =3D=3D 1. To avoid confusion and allow e= asier implementation of tiled formats. It also remove the usage of the deprecated format field `cpp`. Introduce the plane_index parameter to get an offset/pointer on a different plane. Signed-off-by: Louis Chauvet --- drivers/gpu/drm/vkms/vkms_formats.c | 110 ++++++++++++++++++++++++++++----= ---- 1 file changed, 87 insertions(+), 23 deletions(-) diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkm= s_formats.c index 69cf9733fec5..9a1400ad4db6 100644 --- a/drivers/gpu/drm/vkms/vkms_formats.c +++ b/drivers/gpu/drm/vkms/vkms_formats.c @@ -10,22 +10,43 @@ #include "vkms_formats.h" =20 /** - * pixel_offset() - Get the offset of the pixel at coordinates x/y in the = first plane + * packed_pixels_offset() - Get the offset of the block containing the pix= el at coordinates x/y * * @frame_info: Buffer metadata * @x: The x coordinate of the wanted pixel in the buffer * @y: The y coordinate of the wanted pixel in the buffer + * @plane_index: The index of the plane to use + * @offset: The returned offset inside the buffer of the block + * @rem_x,@rem_y: The returned coordinate of the requested pixel in the bl= ock * - * The caller must ensure that the framebuffer associated with this reques= t uses a pixel format - * where block_h =3D=3D block_w =3D=3D 1. - * If this requirement is not fulfilled, the resulting offset can point to= an other pixel or - * outside of the buffer. + * As some pixel formats store multiple pixels in a block (DRM_FORMAT_R* f= or example), some + * pixels are not individually addressable. This function return 3 values:= the offset of the + * whole block, and the coordinate of the requested pixel inside this bloc= k. + * For example, if the format is DRM_FORMAT_R1 and the requested coordinat= e is 13,5, the offset + * will point to the byte 5*pitches + 13/8 (second byte of the 5th line), = and the rem_x/rem_y + * coordinates will be (13 % 8, 5 % 1) =3D (5, 0) + * + * With this function, the caller just have to extract the correct pixel f= rom the block. */ -static size_t pixel_offset(const struct vkms_frame_info *frame_info, int x= , int y) +static void packed_pixels_offset(const struct vkms_frame_info *frame_info,= int x, int y, + int plane_index, int *offset, int *rem_x, int *rem_y) { struct drm_framebuffer *fb =3D frame_info->fb; + const struct drm_format_info *format =3D frame_info->fb->format; + /* Directly using x and y to multiply pitches and format->ccp is not suff= icient because + * in some formats a block can represent multiple pixels. + * + * Dividing x and y by the block size allows to extract the correct offse= t of the block + * containing the pixel. + */ =20 - return fb->offsets[0] + (y * fb->pitches[0]) + (x * fb->format->cpp[0]); + int block_x =3D x / drm_format_info_block_width(format, plane_index); + int block_y =3D y / drm_format_info_block_height(format, plane_index); + *rem_x =3D x % drm_format_info_block_width(format, plane_index); + *rem_y =3D y % drm_format_info_block_height(format, plane_index); + *offset =3D fb->offsets[plane_index] + + block_y * fb->pitches[plane_index] + + block_x * format->char_per_block[plane_index]; } =20 /** @@ -35,30 +56,70 @@ static size_t pixel_offset(const struct vkms_frame_info= *frame_info, int x, int * @frame_info: Buffer metadata * @x: The x (width) coordinate inside the plane * @y: The y (height) coordinate inside the plane + * @plane_index: The index of the plane + * @addr: The returned pointer + * @rem_x,@rem_y: The returned coordinate of the requested pixel in the bl= ock * - * Takes the information stored in the frame_info, a pair of coordinates, = and - * returns the address of the first color channel. - * This function assumes the channels are packed together, i.e. a color ch= annel - * comes immediately after another in the memory. And therefore, this func= tion - * doesn't work for YUV with chroma subsampling (e.g. YUV420 and NV21). + * Takes the information stored in the frame_info, a pair of coordinates, = and returns the address + * of the block containing this pixel and the pixel position inside this b= lock. * - * The caller must ensure that the framebuffer associated with this reques= t uses a pixel format - * where block_h =3D=3D block_w =3D=3D 1, otherwise the returned pointer c= an be outside the buffer. + * See @packed_pixel_offset for details about rem_x/rem_y behavior. */ -static void *packed_pixels_addr(const struct vkms_frame_info *frame_info, - int x, int y) +static void packed_pixels_addr(const struct vkms_frame_info *frame_info, + int x, int y, int plane_index, u8 **addr, int *rem_x, + int *rem_y) { - size_t offset =3D pixel_offset(frame_info, x, y); + int offset; =20 - return (u8 *)frame_info->map[0].vaddr + offset; + packed_pixels_offset(frame_info, x, y, plane_index, &offset, rem_x, rem_y= ); + *addr =3D (u8 *)frame_info->map[0].vaddr + offset; } =20 -static void *get_packed_src_addr(const struct vkms_frame_info *frame_info,= int y) +/** + * packed_pixels_addr_1x1() - Get the pointer to the block containing the = pixel at the given + * coordinates + * + * @frame_info: Buffer metadata + * @x: The x (width) coordinate inside the plane + * @y: The y (height) coordinate inside the plane + * @plane_index: The index of the plane + * @addr: The returned pointer + * + * This function can only be used with format where block_h =3D=3D block_w= =3D=3D 1. + */ +static void packed_pixels_addr_1x1(const struct vkms_frame_info *frame_inf= o, + int x, int y, int plane_index, u8 **addr) +{ + int offset, rem_x, rem_y; + + WARN_ONCE(drm_format_info_block_width(frame_info->fb->format, + plane_index) !=3D 1, + "%s() only support formats with block_w =3D=3D 1", __func__); + WARN_ONCE(drm_format_info_block_height(frame_info->fb->format, + plane_index) !=3D 1, + "%s() only support formats with block_h =3D=3D 1", __func__); + + packed_pixels_offset(frame_info, x, y, plane_index, &offset, &rem_x, + &rem_y); + *addr =3D (u8 *)frame_info->map[0].vaddr + offset; +} + +static void *get_packed_src_addr(const struct vkms_frame_info *frame_info,= int y, + int plane_index) { int x_src =3D frame_info->src.x1 >> 16; int y_src =3D y - frame_info->rotated.y1 + (frame_info->src.y1 >> 16); + u8 *addr; + int rem_x, rem_y; + + WARN_ONCE(drm_format_info_block_width(frame_info->fb->format, plane_index= ) !=3D 1, + "%s() only support formats with block_w =3D=3D 1", __func__); + WARN_ONCE(drm_format_info_block_height(frame_info->fb->format, plane_inde= x) !=3D 1, + "%s() only support formats with block_h =3D=3D 1", __func__); =20 - return packed_pixels_addr(frame_info, x_src, y_src); + packed_pixels_addr(frame_info, x_src, y_src, plane_index, &addr, &rem_x, = &rem_y); + + return addr; } =20 static int get_x_position(const struct vkms_frame_info *frame_info, int li= mit, int x) @@ -167,14 +228,14 @@ void vkms_compose_row(struct line_buffer *stage_buffe= r, struct vkms_plane_state { struct pixel_argb_u16 *out_pixels =3D stage_buffer->pixels; struct vkms_frame_info *frame_info =3D plane->frame_info; - u8 *src_pixels =3D get_packed_src_addr(frame_info, y); + u8 *src_pixels =3D get_packed_src_addr(frame_info, y, 0); int limit =3D min_t(size_t, drm_rect_width(&frame_info->dst), stage_buffe= r->n_pixels); =20 for (size_t x =3D 0; x < limit; x++, src_pixels +=3D frame_info->fb->form= at->cpp[0]) { int x_pos =3D get_x_position(frame_info, limit, x); =20 if (drm_rotation_90_or_270(frame_info->rotation)) - src_pixels =3D get_packed_src_addr(frame_info, x + frame_info->rotated.= y1) + src_pixels =3D get_packed_src_addr(frame_info, x + frame_info->rotated.= y1, 0) + frame_info->fb->format->cpp[0] * y; =20 plane->pixel_read(src_pixels, &out_pixels[x_pos]); @@ -275,7 +336,10 @@ void vkms_writeback_row(struct vkms_writeback_job *wb, { struct vkms_frame_info *frame_info =3D &wb->wb_frame_info; int x_dst =3D frame_info->dst.x1; - u8 *dst_pixels =3D packed_pixels_addr(frame_info, x_dst, y); + u8 *dst_pixels; + int rem_x, rem_y; + + packed_pixels_addr(frame_info, x_dst, y, 0, &dst_pixels, &rem_x, &rem_y); struct pixel_argb_u16 *in_pixels =3D src_buffer->pixels; int x_limit =3D min_t(size_t, drm_rect_width(&frame_info->dst), src_buffe= r->n_pixels); =20 --=20 2.43.0