[PATCH v7 09/23] drm/sun4i: sun6i_mipi_dsi: Enable HBP, HSA_HSE for burst mode
From: Jagan Teki <jagan@amarulasolutions.com>
Date: 2019-02-01 15:43:07
Also in:
dri-devel, linux-clk, linux-devicetree, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for allwinner a10, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Chen-Yu Tsai, Linus Torvalds
Horizontal back porch, sync active and sync end bits are needed to disable for burst mode panel operations. So, disable them via dsi base control register. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Tested-by: Merlijn Wajer <redacted> --- drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index a2ad9fa7f8d5..3d7c03161954 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c@@ -549,12 +549,17 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, u16 hbp, hfp, hsa, hblk, vblk; size_t bytes; u8 *buffer; + u32 val = 0; /* Do all timing calculations up front to allocate buffer space */ if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { hbp = hfp = hsa = vblk = 0; hblk = (mode->hdisplay * Bpp); + + regmap_read(dsi->regs, SUN6I_DSI_BASIC_CTL_REG, &val); + val |= SUN6I_DSI_BASIC_CTL_HBP_DIS; + val |= SUN6I_DSI_BASIC_CTL_HSA_HSE_DIS; goto alloc_buf; }
@@ -603,7 +608,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, if (WARN_ON(!buffer)) return; - regmap_write(dsi->regs, SUN6I_DSI_BASIC_CTL_REG, 0); + regmap_write(dsi->regs, SUN6I_DSI_BASIC_CTL_REG, val); regmap_write(dsi->regs, SUN6I_DSI_SYNC_HSS_REG, sun6i_dsi_build_sync_pkt(MIPI_DSI_H_SYNC_START,
--
2.18.0.321.gffc6fa0e3
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