When pixel clock less than 148.5MHz, make sloopboost=2 tklvl=20 cklvl=13 increase rasing/falling time and increase data & clock voltage driver.
When pixel clock less than 74.25MHz, make sloopboost=0 tklvl=19 cklvl=18, increase data and clock voltage driver.
Signed-off-by: Yakir Yang ykk@rock-chips.com --- Changes in v4: - combine the modification of electrical parameter for eye-diagram & single-ended test to an separate patch.
Changes in v3: - for pixel clock less than 148.5MHz, set txlvl to 20.
Changes in v2: - set slopeboost back to 10%-20%, then rasing/falling time would pass. - for pixel clock less then 74.25MHz, set txlvl to 19 and cklvl to 18.
drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c index 65b0f7b..80d6fc8 100644 --- a/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c +++ b/drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c @@ -135,9 +135,9 @@ static const struct dw_hdmi_curr_ctrl rockchip_cur_ctr[] = {
static const struct dw_hdmi_phy_config rockchip_phy_config[] = { /*pixelclk symbol term vlev*/ - { 74250000, 0x8009, 0x0004, 0x01ad}, - { 148500000, 0x8029, 0x0004, 0x01ad}, - { 297000000, 0x8039, 0x0005, 0x01ad}, + { 74250000, 0x8009, 0x0004, 0x0272}, + { 148500000, 0x802b, 0x0004, 0x028d}, + { 297000000, 0x8039, 0x0005, 0x028d}, { ~0UL, 0x0000, 0x0000, 0x0000} };