6.1-stable review patch. If anyone has any objections, please let me know.
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From: Tomi Valkeinen tomi.valkeinen@ideasonboard.com
[ Upstream commit e5fb21678136a9d009d5c43821881eb4c34fae97 ]
The TC358768 documentation uses HFP, HBP, etc. values to deal with the video mode, while the driver currently uses the DRM display mode (htotal, hsync_start, etc).
Change the driver to convert the DRM display mode to struct videomode, which then allows us to use the same units the documentation uses. This makes it much easier to work on the code when using the TC358768 documentation as a reference.
Reviewed-by: Peter Ujfalusi peter.ujfalusi@gmail.com Tested-by: Maxim Schwalm maxim.schwalm@gmail.com # Asus TF700T Tested-by: Marcel Ziswiler marcel.ziswiler@toradex.com Signed-off-by: Tomi Valkeinen tomi.valkeinen@ideasonboard.com Signed-off-by: Robert Foss rfoss@kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20230906-tc358768-v4-6-31725f0... Stable-dep-of: f1dabbe64506 ("drm/bridge: tc358768: Fix tc358768_ns_to_cnt()") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/tc358768.c | 45 ++++++++++++++++--------------- 1 file changed, 24 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 70fd560ed394e..8a44e75ae24cb 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -651,6 +651,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) u32 dsiclk, dsibclk, video_start; const u32 internal_delay = 40; int ret, i; + struct videomode vm;
if (mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS) { dev_warn_once(priv->dev, "Non-continuous mode unimplemented, falling back to continuous\n"); @@ -674,6 +675,8 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) return; }
+ drm_display_mode_to_videomode(mode, &vm); + dsiclk = priv->dsiclk; dsibclk = dsiclk / 4;
@@ -682,28 +685,28 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) switch (dsi_dev->format) { case MIPI_DSI_FMT_RGB888: val |= (0x3 << 4); - hact = mode->hdisplay * 3; - video_start = (mode->htotal - mode->hsync_start) * 3; + hact = vm.hactive * 3; + video_start = (vm.hsync_len + vm.hback_porch) * 3; data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24; break; case MIPI_DSI_FMT_RGB666: val |= (0x4 << 4); - hact = mode->hdisplay * 3; - video_start = (mode->htotal - mode->hsync_start) * 3; + hact = vm.hactive * 3; + video_start = (vm.hsync_len + vm.hback_porch) * 3; data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18; break;
case MIPI_DSI_FMT_RGB666_PACKED: val |= (0x4 << 4) | BIT(3); - hact = mode->hdisplay * 18 / 8; - video_start = (mode->htotal - mode->hsync_start) * 18 / 8; + hact = vm.hactive * 18 / 8; + video_start = (vm.hsync_len + vm.hback_porch) * 18 / 8; data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18; break;
case MIPI_DSI_FMT_RGB565: val |= (0x5 << 4); - hact = mode->hdisplay * 2; - video_start = (mode->htotal - mode->hsync_start) * 2; + hact = vm.hactive * 2; + video_start = (vm.hsync_len + vm.hback_porch) * 2; data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16; break; default: @@ -815,43 +818,43 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) tc358768_write(priv, TC358768_DSI_EVENT, 0);
/* vact */ - tc358768_write(priv, TC358768_DSI_VACT, mode->vdisplay); + tc358768_write(priv, TC358768_DSI_VACT, vm.vactive);
/* vsw */ - tc358768_write(priv, TC358768_DSI_VSW, - mode->vsync_end - mode->vsync_start); + tc358768_write(priv, TC358768_DSI_VSW, vm.vsync_len); + /* vbp */ - tc358768_write(priv, TC358768_DSI_VBPR, - mode->vtotal - mode->vsync_end); + tc358768_write(priv, TC358768_DSI_VBPR, vm.vback_porch);
/* hsw * byteclk * ndl / pclk */ - val = (u32)div_u64((mode->hsync_end - mode->hsync_start) * + val = (u32)div_u64(vm.hsync_len * ((u64)priv->dsiclk / 4) * priv->dsi_lanes, - mode->clock * 1000); + vm.pixelclock); tc358768_write(priv, TC358768_DSI_HSW, val);
/* hbp * byteclk * ndl / pclk */ - val = (u32)div_u64((mode->htotal - mode->hsync_end) * + val = (u32)div_u64(vm.hback_porch * ((u64)priv->dsiclk / 4) * priv->dsi_lanes, - mode->clock * 1000); + vm.pixelclock); tc358768_write(priv, TC358768_DSI_HBPR, val); } else { /* Set event mode */ tc358768_write(priv, TC358768_DSI_EVENT, 1);
/* vact */ - tc358768_write(priv, TC358768_DSI_VACT, mode->vdisplay); + tc358768_write(priv, TC358768_DSI_VACT, vm.vactive);
/* vsw (+ vbp) */ tc358768_write(priv, TC358768_DSI_VSW, - mode->vtotal - mode->vsync_start); + vm.vsync_len + vm.vback_porch); + /* vbp (not used in event mode) */ tc358768_write(priv, TC358768_DSI_VBPR, 0);
/* (hsw + hbp) * byteclk * ndl / pclk */ - val = (u32)div_u64((mode->htotal - mode->hsync_start) * + val = (u32)div_u64((vm.hsync_len + vm.hback_porch) * ((u64)priv->dsiclk / 4) * priv->dsi_lanes, - mode->clock * 1000); + vm.pixelclock); tc358768_write(priv, TC358768_DSI_HSW, val);
/* hbp (not used in event mode) */