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bh=ThfuC+fWrjdL4kBApcDWJYtFdonpBBWUeWsaT/jmVqo=; b=eSSvDd8MHDGPQRAheA5VyIMjKM9ftBoVAoFfrFVWG0hKgG4rqHtyA4vZCKfVZKzCNI6yFX QGTsLz5mKK7fUEsOYzvxK7g/Z4O6Xpdc3SAb8O/rDoQQndEFLlKm9OpNLbcRKdxn2wItmm xJpQJpzfDeDRGHsN2m0M6/zfrYnvSSQ= X-MC-Unique: GA58UlQKMfmXsw7k7UVETA-1 From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PULL 02/25] edid: edid_desc_next Date: Mon, 10 May 2021 15:20:28 +0200 Message-Id: <20210510132051.2208563-3-kraxel@redhat.com> In-Reply-To: <20210510132051.2208563-1-kraxel@redhat.com> References: <20210510132051.2208563-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=kraxel@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.698, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Gerd Hoffmann , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Add helper function to find the next free desc block. Needed when we start to use the dta descriptor entries. Signed-off-by: Gerd Hoffmann Reviewed-by: Marc-Andr=C3=A9 Lureau Message-id: 20210427150824.638359-1-kraxel@redhat.com Message-Id: <20210427150824.638359-3-kraxel@redhat.com> --- hw/display/edid-generate.c | 41 ++++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 15 deletions(-) diff --git a/hw/display/edid-generate.c b/hw/display/edid-generate.c index a1bea9a3aa35..ae34999f9eb5 100644 --- a/hw/display/edid-generate.c +++ b/hw/display/edid-generate.c @@ -144,6 +144,17 @@ static void edid_checksum(uint8_t *edid) } } =20 +static uint8_t *edid_desc_next(uint8_t *edid, uint8_t *dta, uint8_t *desc) +{ + if (desc =3D=3D NULL) { + return NULL; + } + if (desc + 18 + 18 < edid + 127) { + return desc + 18; + } + return NULL; +} + static void edid_desc_type(uint8_t *desc, uint8_t type) { desc[0] =3D 0; @@ -300,7 +311,7 @@ uint32_t qemu_edid_dpi_to_mm(uint32_t dpi, uint32_t res) void qemu_edid_generate(uint8_t *edid, size_t size, qemu_edid_info *info) { - uint32_t desc =3D 54; + uint8_t *desc =3D edid + 54; uint8_t *xtra3 =3D NULL; uint8_t *dta =3D NULL; uint32_t width_mm, height_mm; @@ -401,32 +412,32 @@ void qemu_edid_generate(uint8_t *edid, size_t size, =20 /* =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D descriptor blocks =3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D */ =20 - edid_desc_timing(edid + desc, info->prefx, info->prefy, + edid_desc_timing(desc, info->prefx, info->prefy, width_mm, height_mm); - desc +=3D 18; + desc =3D edid_desc_next(edid, dta, desc); =20 - edid_desc_ranges(edid + desc); - desc +=3D 18; + edid_desc_ranges(desc); + desc =3D edid_desc_next(edid, dta, desc); =20 if (info->name) { - edid_desc_text(edid + desc, 0xfc, info->name); - desc +=3D 18; + edid_desc_text(desc, 0xfc, info->name); + desc =3D edid_desc_next(edid, dta, desc); } =20 if (info->serial) { - edid_desc_text(edid + desc, 0xff, info->serial); - desc +=3D 18; + edid_desc_text(desc, 0xff, info->serial); + desc =3D edid_desc_next(edid, dta, desc); } =20 - if (desc < 126) { - xtra3 =3D edid + desc; + if (desc) { + xtra3 =3D desc; edid_desc_xtra3_std(xtra3); - desc +=3D 18; + desc =3D edid_desc_next(edid, dta, desc); } =20 - while (desc < 126) { - edid_desc_dummy(edid + desc); - desc +=3D 18; + while (desc) { + edid_desc_dummy(desc); + desc =3D edid_desc_next(edid, dta, desc); } =20 /* =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D finish up =3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D */ --=20 2.31.1