[PATCH 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection

Jagan Teki
2018-11-03T10:09:39Z

Instruction loop selection would require before writing
loop number registers, so enable idle, LP11 bits on
loop selection register.

Reference code available in BSP
(in drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
(dsi_dev[sel]->dsi_inst_loop_sel.dwval = 2<<(4*DSI_INST_ID_LP11) |
3<<(4*DSI_INST_ID_DLY);

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index da152c21ec62..077b57ec964c 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -397,6 +397,10 @@ static void sun6i_dsi_setup_inst_loop(struct sun6i_dsi *dsi,
struct mipi_dsi_device *device = dsi->device;
u16 delay;

+ regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_SEL_REG,
+ DSI_INST_ID_HSC << (4 * DSI_INST_ID_LP11) |
+ DSI_INST_ID_HSD << (4 * DSI_INST_ID_DLY));
+
if (device->mode_flags == MIPI_DSI_MODE_VIDEO_BURST)
delay = (((mode->htotal - mode->hdisplay) * 150) /
((mode->clock / 1000) * 8)) - 50;
--
2.18.0.321.gffc6fa0e3