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 13/18] drm/bridge: cdns-dsi: Do not use crtc_* values
Date: Thu, 20 Mar 2025 18:00:08 +0200 [thread overview]
Message-ID: <20250320-cdns-dsi-impro-v1-13-725277c5f43b@ideasonboard.com> (raw)
In-Reply-To: <20250320-cdns-dsi-impro-v1-0-725277c5f43b@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
--
linux-phy mailing list
linux-phy@lists.infradead.org
https://lists.infradead.org/mailman/listinfo/linux-phy
next prev parent reply other threads:[~2025-03-20 16:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-20 15:59 [PATCH 00/18] drm/bridge: cdns-dsi: Make it work a bit better Tomi Valkeinen
2025-03-20 15:59 ` [PATCH 01/18] drm/tidss: Fix missing includes and struct decls Tomi Valkeinen
2025-03-20 15:59 ` [PATCH 02/18] drm/tidss: Use the crtc_* timings when programming the HW Tomi Valkeinen
2025-03-20 15:59 ` [PATCH 03/18] drm/tidss: Add mode_fixup to adjust the clock based on HW Tomi Valkeinen
2025-03-21 14:17 ` Maxime Ripard
2025-04-02 12:16 ` Tomi Valkeinen
2025-03-20 15:59 ` [PATCH 04/18] phy: cdns-dphy: Store hs_clk_rate and return it Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 05/18] phy: cdns-dphy: Remove leftover code Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 06/18] drm/bridge: cdns-dsi: Adjust mode to negative syncs Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 07/18] drm/bridge: cdns-dsi: Fail if HS rate changed when validating PHY config Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 08/18] drm/bridge: cdns-dsi: Clean up cdns_dsi_mode2cfg() Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 09/18] drm/bridge: cdns-dsi: Fix REG_WAKEUP_TIME value Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 10/18] drm/bridge: cdns-dsi: Fix event mode Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 11/18] drm/bridge: cdns-dsi: Remove broken fifo emptying check Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 12/18] drm/bridge: cdns-dsi: Drop checks that shouldn't be in .mode_valid() Tomi Valkeinen
2025-03-20 16:00 ` Tomi Valkeinen [this message]
2025-03-20 16:00 ` [PATCH 14/18] drm/bridge: cdns-dsi: Use videomode internally Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 15/18] drm/bridge: cdns-dsi: Tune adjusted_mode->clock according to dsi needs Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 16/18] drm/bridge: cdns-dsi: Update htotal in cdns_dsi_mode2cfg() Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 17/18] drm/bridge: cdns-dsi: Drop cdns_dsi_adjust_phy_config() Tomi Valkeinen
2025-03-20 16:00 ` [PATCH 18/18] drm/bridge: cdns-dsi: Don't fail on MIPI_DSI_MODE_VIDEO_BURST Tomi Valkeinen
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