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h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=I1mKM0TovFFJY5lflvJFCV0pyXAjh5h+gbj60CWywvIIHC44qMIQxooSH/IHHzrA9 GotZ1+PS1Mv8LeACQ4H6lh/0gYWeNF9SJ1sfOJrqKdqRfSHevLU26Ft67qWXJLa9fJ R1KitirANFXpH7DmxjT2+OZFI+tv05ykfrKfjWyjNM7g0xZnIVDhZb2SpjY3BKR9SJ 9AX+q2FzfbpNEUkNoKKA6qvVJfvn5lU0b8EFjvZlHCp+me0uAUeCSWdRERLQU+M4cB bR8vPdXrbnMKX3SIkJ46Kt0Sx/g3EHNVhYST/YVyf7Jldx7We3BVtYezsWN9TQ/8rP CeMuWNR3xXVwA== Received: from localhost (unknown [100.64.0.241]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange secp256r1 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by bali.collaboradmins.com (Postfix) with ESMTPSA id 6A52917E3C6D; Tue, 01 Sep 2026 20:51:16 +0200 (CEST) From: Cristian Ciocaltea Date: Tue, 01 Sep 2026 21:51:12 +0300 Subject: [PATCH v11 48/74] drm/vc4: hdmi: Defer pixel clock validation to HDMI helpers Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20260901-dw-hdmi-qp-scramb-v11-48-bc12954a0688@collabora.com> References: <20260901-dw-hdmi-qp-scramb-v11-0-bc12954a0688@collabora.com> In-Reply-To: <20260901-dw-hdmi-qp-scramb-v11-0-bc12954a0688@collabora.com> To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Dave Stevenson , Dmitry Baryshkov , Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Luca Ceresoli , Chen-Yu Tsai , Samuel Holland , =?utf-8?q?Ma=C3=ADra_Canal?= , Raspberry Pi Kernel Maintenance , Raphael Gallais-Pou , Sandy Huang , =?utf-8?q?Heiko_St=C3=BCbner?= , Andy Yan , Algea Cao , Daniel Stone , Liu Ying , Phong LE , Helge Deller Cc: kernel@collabora.com, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-rockchip@lists.infradead.org, linux-fbdev@vger.kernel.org X-Mailer: b4 0.15.2 X-Rspamd-Server: rspamd-worker-8404 X-Spamd-Result: default: False [3.34 / 15.00]; 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FORGED_RECIPIENTS_MAILLIST(0.00)[]; ARC_ALLOW(0.00)[subspace.kernel.org:s=arc-20240116:i=1]; FREEMAIL_TO(0.00)[linux.intel.com,kernel.org,suse.de,gmail.com,ffwll.ch,raspberrypi.com,intel.com,linaro.org,ideasonboard.com,kwiboo.se,bootlin.com,sholland.org,igalia.com,rock-chips.com,sntech.de,collabora.com,nxp.com,baylibre.com,gmx.de]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[172.105.105.114:from] X-Rspamd-Queue-Id: 3D5521C4F04 X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= drm_atomic_helper_connector_hdmi_check() rejects modes whose computed TMDS character rate exceeds the connector limit before invoking the driver's .tmds_char_rate_valid() hook. BCM2835 is capped at 162 MHz, slightly below the 165 MHz limit of HDMI 1.2. Set supported_tmds_char_rate in vc4_hdmi_connector_funcs_hdmi10 so that the limit inferred from supported_hdmi_ver is overridden by the lower hardware constraint. All other chip variants rely on the standard HDMI 1.4/2.0 limits, so the default validation suffices. This allows vc4_hdmi_connector_clock_valid() to be simplified by dropping the now-redundant max_pixel_clock field from struct vc4_hdmi_variant. Reviewed-by: Maxime Ripard Signed-off-by: Cristian Ciocaltea --- drivers/gpu/drm/vc4/vc4_hdmi.c | 10 +--------- drivers/gpu/drm/vc4/vc4_hdmi.h | 3 --- 2 files changed, 1 insertion(+), 12 deletions(-) diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 2451ff85e759..6d3db0d24c38 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1529,12 +1529,8 @@ vc4_hdmi_connector_clock_valid(const struct drm_connector *connector, const struct drm_display_mode *mode, unsigned long long clock) { - const struct vc4_hdmi *vc4_hdmi = connector_to_vc4_hdmi(connector); struct vc4_dev *vc4 = to_vc4_dev(connector->dev); - if (clock > vc4_hdmi->variant->max_pixel_clock) - return MODE_CLOCK_HIGH; - if (!vc4->hvs->vc5_hdmi_enable_hdmi_20 && clock > HDMI_1_3_TMDS_CHAR_RATE_MAX_HZ) return MODE_CLOCK_HIGH; @@ -1579,6 +1575,7 @@ static const struct drm_connector_hdmi_funcs vc4_hdmi_connector_funcs_hdmi12 = { VC4_HDMI_CONNECTOR_FUNCS_COMMON, .max_bpc = 8, .supported_hdmi_ver = HDMI_VERSION_1_2, + .supported_tmds_char_rate = 162000000, }; static const struct drm_connector_hdmi_funcs vc4_hdmi_connector_funcs_hdmi14 = { @@ -3185,7 +3182,6 @@ static const struct vc4_hdmi_variant bcm2835_variant = { .encoder_type = VC4_ENCODER_TYPE_HDMI0, .debugfs_name = "hdmi_regs", .card_name = "vc4-hdmi", - .max_pixel_clock = 162000000, .registers = vc4_hdmi_fields, .num_registers = ARRAY_SIZE(vc4_hdmi_fields), @@ -3205,7 +3201,6 @@ static const struct vc4_hdmi_variant bcm2711_hdmi0_variant = { .encoder_type = VC4_ENCODER_TYPE_HDMI0, .debugfs_name = "hdmi0_regs", .card_name = "vc4-hdmi-0", - .max_pixel_clock = HDMI_2_0_TMDS_CHAR_RATE_MAX_HZ, .registers = vc5_hdmi_hdmi0_fields, .num_registers = ARRAY_SIZE(vc5_hdmi_hdmi0_fields), .phy_lane_mapping = { @@ -3234,7 +3229,6 @@ static const struct vc4_hdmi_variant bcm2711_hdmi1_variant = { .encoder_type = VC4_ENCODER_TYPE_HDMI1, .debugfs_name = "hdmi1_regs", .card_name = "vc4-hdmi-1", - .max_pixel_clock = HDMI_1_3_TMDS_CHAR_RATE_MAX_HZ, .registers = vc5_hdmi_hdmi1_fields, .num_registers = ARRAY_SIZE(vc5_hdmi_hdmi1_fields), .phy_lane_mapping = { @@ -3263,7 +3257,6 @@ static const struct vc4_hdmi_variant bcm2712_hdmi0_variant = { .encoder_type = VC4_ENCODER_TYPE_HDMI0, .debugfs_name = "hdmi0_regs", .card_name = "vc4-hdmi-0", - .max_pixel_clock = HDMI_2_0_TMDS_CHAR_RATE_MAX_HZ, .registers = vc6_hdmi_hdmi0_fields, .num_registers = ARRAY_SIZE(vc6_hdmi_hdmi0_fields), .phy_lane_mapping = { @@ -3290,7 +3283,6 @@ static const struct vc4_hdmi_variant bcm2712_hdmi1_variant = { .encoder_type = VC4_ENCODER_TYPE_HDMI1, .debugfs_name = "hdmi1_regs", .card_name = "vc4-hdmi-1", - .max_pixel_clock = HDMI_2_0_TMDS_CHAR_RATE_MAX_HZ, .registers = vc6_hdmi_hdmi1_fields, .num_registers = ARRAY_SIZE(vc6_hdmi_hdmi1_fields), .phy_lane_mapping = { diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h index f6159c9e6144..61486e7b4ba2 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h @@ -29,9 +29,6 @@ struct vc4_hdmi_variant { /* Filename to expose the registers in debugfs */ const char *debugfs_name; - /* Maximum pixel clock supported by the controller (in Hz) */ - unsigned long long max_pixel_clock; - /* List of the registers available on that variant */ const struct vc4_hdmi_register *registers;