Commit 2e1abbdd authored by Florian Tobias Schandinat's avatar Florian Tobias Schandinat
Browse files

viafb: set sync polarity for all output devices 



This patch sets the sync polarity for all output devices, not only CRT.
This may give some people a working screen but only if lcd scaling and
centering are not used as it is currently too dificult to propagate a
different resolution (from what the application thinks) to the correct
output device. Hopefully this does not introduce regressions as the
polarity of non-CRT devices was completly ignored before.

Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
parent 7f0e153e

drivers/video/via/hw.c

+25 −9
Original line number Diff line number Diff line
@@ -2014,7 +2014,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table, 
	int index = 0;

	int h_addr, v_addr;

	u32 pll_D_N;

	u8 polarity = 0;



	for (i = 0; i < video_mode->mode_array; i++) {

		index = i;
@@ -2041,14 +2040,6 @@ void viafb_fill_crtc_timing(struct crt_mode_table *crt_table, 


	h_addr = crt_reg.hor_addr;

	v_addr = crt_reg.ver_addr;



	/* update polarity for CRT timing */

	if (crt_table[index].h_sync_polarity == NEGATIVE)

		polarity |= VIA_HSYNC_NEGATIVE;

	if (crt_table[index].v_sync_polarity == NEGATIVE)

		polarity |= VIA_VSYNC_NEGATIVE;

	via_set_sync_polarity(VIA_CRT, polarity);



	if (set_iga == IGA1) {

		viafb_unlock_crt();

		viafb_write_reg(CR09, VIACR, 0x00);	/*initial CR09=0 */
@@ -2352,6 +2343,17 @@ static void set_display_channel(void) 
	}

}



static u8 get_sync(struct fb_info *info)

{

	u8 polarity = 0;



	if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))

		polarity |= VIA_HSYNC_NEGATIVE;

	if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))

		polarity |= VIA_VSYNC_NEGATIVE;

	return polarity;

}



int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp,

	struct VideoModeTable *vmode_tbl1, int video_bpp1)

{
@@ -2566,6 +2568,15 @@ int viafb_setmode(struct VideoModeTable *vmode_tbl, int video_bpp, 
			viafb_DeviceStatus = CRT_Device;

	}

	device_on();

	if (!viafb_dual_fb)

		via_set_sync_polarity(devices, get_sync(viafbinfo));

	else {

		via_set_sync_polarity(viaparinfo->shared->iga1_devices,

			get_sync(viafbinfo));

		via_set_sync_polarity(viaparinfo->shared->iga2_devices,

			get_sync(viafbinfo1));

	}



	via_set_state(devices, VIA_STATE_ON);

	device_screen_on();

	return 1;
@@ -2719,4 +2730,9 @@ void viafb_fill_var_timing_info(struct fb_var_screeninfo *var, int refresh, 
	    crt_reg.ver_total - (crt_reg.ver_sync_start + crt_reg.ver_sync_end);

	var->lower_margin = crt_reg.ver_sync_start - crt_reg.ver_addr;

	var->vsync_len = crt_reg.ver_sync_end;

	var->sync = 0;

	if (crt_timing[index].h_sync_polarity == POSITIVE)

		var->sync |= FB_SYNC_HOR_HIGH_ACT;

	if (crt_timing[index].v_sync_polarity == POSITIVE)

		var->sync |= FB_SYNC_VERT_HIGH_ACT;

}

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