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authorHung-Te Lin <hungte@chromium.org>2019-08-07 09:59:16 +0800
committerJulius Werner <jwerner@chromium.org>2019-08-14 21:16:09 +0000
commitff0945e8ec8162d463ee017a86d1423dc51dd633 (patch)
tree3781f70c445689e4f472b89706baabc268b234ba /src/soc/mediatek/mt8173
parent4a73bf8378d8e36f0bae1488aa0b17cb5d5bd4ce (diff)
soc/mediatek: dsi: Refactor PHY timing calculation
The PHY timing should be calculated by data rate (Mbps). However for 8173 some values were hard-coded so we want to introduce a new mtk_phy_timing structure and a weak function mtk_dsi_override_phy_timing that allows per-SOC customization to apply PHY timings. BUG=b:80501386,b:117254947 TEST=make -j # board = oak and boots Change-Id: I1176ca06dda026029ff431aca7f9e21479eed670 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/34771 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/soc/mediatek/mt8173')
-rw-r--r--src/soc/mediatek/mt8173/dsi.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8173/dsi.c b/src/soc/mediatek/mt8173/dsi.c
index 2e4a4bd58a..32f4f1ce1c 100644
--- a/src/soc/mediatek/mt8173/dsi.c
+++ b/src/soc/mediatek/mt8173/dsi.c
@@ -107,6 +107,23 @@ void mtk_dsi_reset(void)
clrbits_le32(&dsi0->dsi_con_ctrl, 1);
}
+void mtk_dsi_override_phy_timing(struct mtk_phy_timing *timing)
+{
+ int lpx = 5;
+ timing->lpx = lpx;
+ timing->da_hs_prepare = 6;
+ timing->da_hs_zero = 10;
+ timing->da_hs_trail = 8;
+
+ timing->ta_go = 4 * lpx;
+ timing->ta_sure = 3 * lpx / 2;
+ timing->ta_get = 5 * lpx;
+ timing->da_hs_exit = 7;
+
+ timing->da_hs_sync = 0;
+ timing->clk_hs_exit = 2 * lpx;
+}
+
void mtk_dsi_pin_drv_ctrl(void)
{
struct stopwatch sw;