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From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
To: Jyri Sarha <jyri.sarha@iki.fi>,
	 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	 Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	 David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>,  Vinod Koul <vkoul@kernel.org>,
	Kishon Vijay Abraham I <kishon@kernel.org>,
	 Andrzej Hajda <andrzej.hajda@intel.com>,
	 Neil Armstrong <neil.armstrong@linaro.org>,
	Robert Foss <rfoss@kernel.org>,
	 Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
	 Jonas Karlman <jonas@kwiboo.se>,
	Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
	 linux-phy@lists.infradead.org,
	Francesco Dolcini <francesco@dolcini.it>,
	 Aradhya Bhatia <aradhya.bhatia@linux.dev>,
	 Devarsh Thakkar <devarsht@ti.com>,
	 Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Subject: [PATCH v2 13/18] drm/bridge: cdns-dsi: Do not use crtc_* values
Date: Wed, 02 Apr 2025 16:30:55 +0300	[thread overview]
Message-ID: <20250402-cdns-dsi-impro-v2-13-4a093eaa5e27@ideasonboard.com> (raw)
In-Reply-To: <20250402-cdns-dsi-impro-v2-0-4a093eaa5e27@ideasonboard.com>

The driver uses crtc_* fields from the mode. While I think in the
enable-path this would be correct, I do not think it's correct in the
check phase, as the crtc hasn't had a chance to update the crtc_* fields
yet.

Overall, my understanding is that the crtc_* fields are relevant only in
cases where we have things like interlace or double pixel mode, where we
have a logical and real timings. We never use those with DSI, so the
crtc_* fields should just always match the normal values.

So, drop the use of crtc_* values.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---
 drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
index cf783680b1b4..220213f5cb09 100644
--- a/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
+++ b/drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c
@@ -476,10 +476,10 @@ static int cdns_dsi_mode2cfg(struct cdns_dsi *dsi,
 	bool sync_pulse;
 	int bpp;
 
-	dpi_hsa = mode->crtc_hsync_end - mode->crtc_hsync_start;
-	dpi_hbp = mode->crtc_htotal - mode->crtc_hsync_end;
-	dpi_hfp =  mode->crtc_hsync_start - mode->crtc_hdisplay;
-	dpi_hact = mode->crtc_hdisplay;
+	dpi_hsa = mode->hsync_end - mode->hsync_start;
+	dpi_hbp = mode->htotal - mode->hsync_end;
+	dpi_hfp =  mode->hsync_start - mode->hdisplay;
+	dpi_hact = mode->hdisplay;
 
 	memset(dsi_cfg, 0, sizeof(*dsi_cfg));
 
@@ -540,11 +540,11 @@ static int cdns_dsi_adjust_phy_config(struct cdns_dsi *dsi,
 	if (dsi_htotal % lanes)
 		adj_dsi_htotal += lanes - (dsi_htotal % lanes);
 
-	dpi_hz = mode->crtc_clock * 1000;
+	dpi_hz = mode->clock * 1000;
 	dlane_bps = (unsigned long long)dpi_hz * adj_dsi_htotal;
 
 	/* data rate in bytes/sec is not an integer, refuse the mode. */
-	dpi_htotal = mode->crtc_htotal;
+	dpi_htotal = mode->htotal;
 	if (do_div(dlane_bps, lanes * dpi_htotal))
 		return -EINVAL;
 
@@ -572,7 +572,7 @@ static int cdns_dsi_check_conf(struct cdns_dsi *dsi,
 	if (ret)
 		return ret;
 
-	ret = phy_mipi_dphy_get_default_config(mode->crtc_clock * 1000,
+	ret = phy_mipi_dphy_get_default_config(mode->clock * 1000,
 					       mipi_dsi_pixel_format_to_bpp(output->dev->format),
 					       nlanes, phy_cfg);
 	if (ret)
@@ -822,11 +822,11 @@ static void cdns_dsi_bridge_atomic_pre_enable(struct drm_bridge *bridge,
 	writel(HFP_LEN(dsi_cfg.hfp) | HACT_LEN(dsi_cfg.hact),
 	       dsi->regs + VID_HSIZE2);
 
-	writel(VBP_LEN(mode->crtc_vtotal - mode->crtc_vsync_end - 1) |
-	       VFP_LEN(mode->crtc_vsync_start - mode->crtc_vdisplay) |
-	       VSA_LEN(mode->crtc_vsync_end - mode->crtc_vsync_start + 1),
+	writel(VBP_LEN(mode->vtotal - mode->vsync_end - 1) |
+	       VFP_LEN(mode->vsync_start - mode->vdisplay) |
+	       VSA_LEN(mode->vsync_end - mode->vsync_start + 1),
 	       dsi->regs + VID_VSIZE1);
-	writel(mode->crtc_vdisplay, dsi->regs + VID_VSIZE2);
+	writel(mode->vdisplay, dsi->regs + VID_VSIZE2);
 
 	tmp = dsi_cfg.htotal -
 	      (dsi_cfg.hsa + DSI_BLANKING_FRAME_OVERHEAD +

-- 
2.43.0


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  parent reply	other threads:[~2025-04-02 13:37 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-02 13:30 [PATCH v2 00/18] drm/bridge: cdns-dsi: Make it work a bit better Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 01/18] drm/tidss: Fix missing includes and struct decls Tomi Valkeinen
2025-04-07 17:19   ` Aradhya Bhatia
2025-04-02 13:30 ` [PATCH v2 02/18] drm/tidss: Use the crtc_* timings when programming the HW Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 03/18] drm/tidss: Adjust the pclk based on the HW capabilities Tomi Valkeinen
2025-04-07 17:20   ` Aradhya Bhatia
2025-05-27  9:13   ` Michael Walle
2025-05-27 12:33     ` Tomi Valkeinen
2025-05-28  7:32       ` Devarsh Thakkar
2025-05-28 13:23         ` Michael Walle
2025-04-02 13:30 ` [PATCH v2 04/18] phy: cdns-dphy: Store hs_clk_rate and return it Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 05/18] phy: cdns-dphy: Remove leftover code Tomi Valkeinen
2025-04-07 17:24   ` Aradhya Bhatia
2025-04-02 13:30 ` [PATCH v2 06/18] drm/bridge: cdns-dsi: Adjust mode to negative syncs Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 07/18] drm/bridge: cdns-dsi: Fail if HS rate changed when validating PHY config Tomi Valkeinen
2025-04-07 17:26   ` Aradhya Bhatia
2025-04-02 13:30 ` [PATCH v2 08/18] drm/bridge: cdns-dsi: Clean up cdns_dsi_mode2cfg() Tomi Valkeinen
2025-04-07 17:45   ` Aradhya Bhatia
2025-04-02 13:30 ` [PATCH v2 09/18] drm/bridge: cdns-dsi: Fix REG_WAKEUP_TIME value Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 10/18] drm/bridge: cdns-dsi: Fix event mode Tomi Valkeinen
2025-04-11 11:04   ` Jayesh Choudhary
2025-04-02 13:30 ` [PATCH v2 11/18] drm/bridge: cdns-dsi: Remove broken fifo emptying check Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 12/18] drm/bridge: cdns-dsi: Drop checks that shouldn't be in .mode_valid() Tomi Valkeinen
2025-04-07 17:59   ` Aradhya Bhatia
2025-04-08  6:09     ` Tomi Valkeinen
2025-04-08  7:09       ` Tomi Valkeinen
2025-04-08 13:40         ` Aradhya Bhatia
2025-04-02 13:30 ` Tomi Valkeinen [this message]
2025-04-02 13:30 ` [PATCH v2 14/18] drm/bridge: cdns-dsi: Use videomode internally Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 15/18] drm/bridge: cdns-dsi: Tune adjusted_mode->clock according to dsi needs Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 16/18] drm/bridge: cdns-dsi: Update htotal in cdns_dsi_mode2cfg() Tomi Valkeinen
2025-04-02 13:30 ` [PATCH v2 17/18] drm/bridge: cdns-dsi: Drop cdns_dsi_adjust_phy_config() Tomi Valkeinen
2025-04-02 13:31 ` [PATCH v2 18/18] drm/bridge: cdns-dsi: Don't fail on MIPI_DSI_MODE_VIDEO_BURST Tomi Valkeinen
2025-04-11 11:11 ` [PATCH v2 00/18] drm/bridge: cdns-dsi: Make it work a bit better Jayesh Choudhary

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