[PATCH 11/15] drm/sun4i: tcon: Fix tcon channel 1 backporch calculation
From: Maxime Ripard <hidden>
Date: 2017-03-08 21:52:54
Also in:
dri-devel, linux-clk, linux-devicetree, lkml
On Wed, Mar 08, 2017 at 12:25:59PM +0800, Chen-Yu Tsai wrote:
On Tue, Mar 7, 2017 at 4:56 PM, Maxime Ripard [off-list ref] wrote:quoted
It seems like what's called a backporch in the datasheet is actually the backporch plus the sync period. Fix that in our driver. Signed-off-by: Maxime Ripard <redacted> --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 93249c5ab1e4..e44217fb4f6f 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c@@ -240,15 +240,14 @@ void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, struct drm_encoder *encoder, SUN4I_TCON1_BASIC2_Y(mode->crtc_vdisplay)); /* Set horizontal display timings */ - bp = mode->crtc_htotal - mode->crtc_hsync_end; + bp = mode->crtc_htotal - mode->crtc_hsync_start; DRM_DEBUG_DRIVER("Setting horizontal total %d, backporch %d\n", mode->htotal, bp); regmap_write(tcon->regs, SUN4I_TCON1_BASIC3_REG, SUN4I_TCON1_BASIC3_H_TOTAL(mode->crtc_htotal) | SUN4I_TCON1_BASIC3_H_BACKPORCH(bp)); - /* Set vertical display timings */Why remove the comment?
I have no idea :) This will be fixed. Thanks! Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 801 bytes Desc: not available URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20170308/87d47e87/attachment.sig>