motorola-cedric: fix X11 framebuffer (!187)

This patch fixes Xorg. Adapted from the Xiaomi A1.

[skip ci]: already built successfully in CI

device/linux-motorola-cedric/APKBUILD

@@ -3,7 +3,7 @@
 
 pkgname="linux-motorola-cedric"
 pkgver=3.18.49
-pkgrel=1
+pkgrel=2
 pkgdesc="Motorola Moto G5 kernel fork"
 arch="aarch64"
 _carch="arm64"
@@ -28,6 +28,7 @@ source="
 	03_fix_rndis_ipa_trace_header_not_found.patch
 	05_fix_u_f_header.patch
 	06_fix_usb_gadget_function.patch
+	fb-fixed.patch
 "
 builddir="$srcdir/${_repository}-${_commit}"
 
@@ -74,4 +75,5 @@ sha512sums="706b37cf09d23abab80ba6e8dfbd8c806e4ecb4c3a31f0b0b5ba7ac29c7922716c46
 197d40a214ada87fcb2dfc0ae4911704b9a93354b75179cd6b4aadbb627a37ec262cf516921c84a8b1806809b70a7b440cdc8310a4a55fca5d2c0baa988e3967  gcc8-fix-put-user.patch
 9c549714f03c7a7666e8aa7508a48cfdccab7cf3e97fb59c4df8fa97f75492365926f82c4a677c50780d68d4905504dcccbdd6de6344bd8d4b88b2331933ed46  03_fix_rndis_ipa_trace_header_not_found.patch
 b408f157cc025d410b38f5aee9be977e670e1ac3f195f6c3a6681446fa0c3887067d62a4f729cfcd058fab42fca355b0265764dc2d21515f6e023ed025f55d41  05_fix_u_f_header.patch
-1f23466d1a864f2d2c67ae4250b0c166ecb7755779bbdad6732808a001cc2826cc1d013c2281d2ca1d5abd7d60d13783f0b9f11bb8359971f2b30b911e627220  06_fix_usb_gadget_function.patch"
+1f23466d1a864f2d2c67ae4250b0c166ecb7755779bbdad6732808a001cc2826cc1d013c2281d2ca1d5abd7d60d13783f0b9f11bb8359971f2b30b911e627220  06_fix_usb_gadget_function.patch
+99a3fda1246449b64d5be7cafeb287a04c234dcb3e7c8617d2aa31442974bf8788857b4935a6000fc157542f713ec253718133b92caab8932d808a760e3b667a  fb-fixed.patch"

device/linux-motorola-cedric/fb-fixed.patch

@@ -0,0 +1,96 @@
+diff -r -u mdss/mdss_fb.c android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_fb.c
+--- mdss/mdss_fb.c	2019-01-24 20:56:07.984371000 +0100
++++ android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_fb.c	2019-01-24 21:06:44.513242695 +0100
+@@ -1962,7 +1962,7 @@
+ 		if (is_panel_split(mfd) && pdata->next)
+ 			mdss_fb_validate_split(pdata->panel_info.xres,
+ 					pdata->next->panel_info.xres, mfd);
+-		mdss_panelinfo_to_fb_var(panel_info, var);
++		mdss_panelinfo_to_fb_var(mfd);
+ 		if (mdss_fb_send_panel_event(mfd, MDSS_EVENT_CHECK_PARAMS,
+ 							panel_info))
+ 			pr_err("Failed to send panel event CHECK_PARAMS\n");
+@@ -2077,7 +2077,7 @@
+ 		 * programmed in the controller.
+ 		 * Update this info in the upstream structs.
+ 		 */
+-		mdss_panelinfo_to_fb_var(panel_info, var);
++		mdss_panelinfo_to_fb_var(mfd);
+ 
+ 		/* Start the work thread to signal idle time */
+ 		if (mfd->idle_time)
+@@ -2807,7 +2807,7 @@
+ 		return ret;
+ 	}
+ 
+-	mdss_panelinfo_to_fb_var(panel_info, var);
++	mdss_panelinfo_to_fb_var(mfd);
+ 
+ 	fix->type = panel_info->is_3d_panel;
+ 	if (mfd->mdp.fb_stride)
+@@ -3512,7 +3512,7 @@
+ 	}
+ 	var->xres_virtual = var->xres;
+ 	var->yres_virtual = pinfo->yres * mfd->fb_page;
+-	mdss_panelinfo_to_fb_var(pinfo, var);
++	mdss_panelinfo_to_fb_var(mfd);
+ }
+ 
+ int mdss_fb_atomic_commit(struct fb_info *info,
+@@ -3731,9 +3731,14 @@
+ 		pinfo->mipi.dsi_pclk_rate = pinfo->clk_rate;
+ }
+ 
+-void mdss_panelinfo_to_fb_var(struct mdss_panel_info *pinfo,
+-						struct fb_var_screeninfo *var)
++void mdss_panelinfo_to_fb_var(struct msm_fb_data_type *mfd)
+ {
++	if (!mfd)
++		return -EINVAL;
++
++	struct mdss_panel_info *pinfo = mfd->panel_info;
++	struct fb_info *fbi = mfd->fbi;
++	struct fb_var_screeninfo *var = &fbi->var;
+ 	u32 frame_rate;
+ 
+ 	var->xres = mdss_fb_get_panel_xres(pinfo);
+@@ -3767,7 +3772,14 @@
+ 	if (pinfo->physical_height)
+ 		var->height = pinfo->physical_height;
+ 
+-	pr_debug("ScreenInfo: res=%dx%d [%d, %d] [%d, %d]\n",
++	//Hack to update current fbi->mode according to fbi->var when var is updated from panel info
++	if (fbi->mode) {
++		printk("Updating mdss fb mode from fb var\n");
++		fb_var_to_videomode(fbi->mode, var);
++	}
++
++	printk("ScreenInfo: res=%dx%d [%d, %d] [%d, %d]\n",
++
+ 		var->xres, var->yres, var->left_margin,
+ 		var->right_margin, var->upper_margin,
+ 		var->lower_margin);
+diff -r -u mdss/mdss_fb.h android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_fb.h
+--- mdss/mdss_fb.h	2019-01-24 20:56:07.984371000 +0100
++++ android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_fb.h	2019-01-24 21:07:52.105682759 +0100
+@@ -449,6 +449,5 @@
+ 
+ u32 mdss_fb_get_mode_switch(struct msm_fb_data_type *mfd);
+ void mdss_fb_report_panel_dead(struct msm_fb_data_type *mfd);
+-void mdss_panelinfo_to_fb_var(struct mdss_panel_info *pinfo,
+-						struct fb_var_screeninfo *var);
++void mdss_panelinfo_to_fb_var(struct msm_fb_data_type *mfd);
+ #endif /* MDSS_FB_H */
+diff -r -u mdss/mdss_mdp_overlay.c android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_mdp_overlay.c
+--- mdss/mdss_mdp_overlay.c	2019-01-24 20:56:08.004371000 +0100
++++ android_kernel_motorola_msm8937/drivers/video/msm/mdss/mdss_mdp_overlay.c	2019-01-24 21:08:47.682038150 +0100
+@@ -2982,7 +2982,7 @@
+ 	 * data, so any further call to get the screen
+ 	 * info has the updated timings.
+ 	 */
+-	mdss_panelinfo_to_fb_var(&pdata->panel_info, var);
++	mdss_panelinfo_to_fb_var(mfd);
+ 
+ 	MDSS_XLOG(dfps);
+ 	mutex_unlock(&mdp5_data->dfps_lock);
+