Staging: add MSM framebuffer driver

Qualcomm development of the MSM SOC framebuffer driver has
diverged significantly from the driver used by Android. This
is a snapshot of our current driver, in all it's agony. We are
putting this in staging to help with the process of converging
the two drivers.

At this point, the driver has been tested only in dumb
framebuffer mode.

Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
[dwalker@codeaurora.org: added a small compile fix and TODO.]
Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 254 insertions, 0 deletions

diff --git a/drivers/staging/msm/mdp4_overlay_mddi.c b/drivers/staging/msm/mdp4_overlay_mddi.c
new file mode 100644
index 000000000000..be1b2874185b
--- /dev/null
+++ b/drivers/staging/msm/mdp4_overlay_mddi.c
@@ -0,0 +1,254 @@
+/* Copyright (c) 2008-2009, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/time.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/hrtimer.h>
+#include <linux/delay.h>
+#include <mach/hardware.h>
+#include <linux/io.h>
+
+#include <asm/system.h>
+#include <asm/mach-types.h>
+#include <linux/semaphore.h>
+#include <linux/spinlock.h>
+
+#include <linux/fb.h>
+
+#include "mdp.h"
+#include "msm_fb.h"
+#include "mdp4.h"
+
+static struct mdp4_overlay_pipe *mddi_pipe;
+static struct mdp4_overlay_pipe *pending_pipe;
+static struct msm_fb_data_type *mddi_mfd;
+
+#define WHOLESCREEN
+
+void mdp4_overlay_update_lcd(struct msm_fb_data_type *mfd)
+{
+	MDPIBUF *iBuf = &mfd->ibuf;
+	uint8 *src;
+	int bpp, ptype;
+	uint32 format;
+	uint32 mddi_ld_param;
+	uint16 mddi_vdo_packet_reg;
+	struct mdp4_overlay_pipe *pipe;
+
+	if (mfd->key != MFD_KEY)
+		return;
+
+	mddi_mfd = mfd;		/* keep it */
+
+	bpp = iBuf->bpp;
+
+	if (bpp == 2)
+		format = MDP_RGB_565;
+	else if (bpp == 3)
+		format = MDP_RGB_888;
+	else
+		format = MDP_ARGB_8888;
+
+	/* MDP cmd block enable */
+	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_ON, FALSE);
+
+	if (mddi_pipe == NULL) {
+		ptype = mdp4_overlay_format2type(format);
+		pipe = mdp4_overlay_pipe_alloc();
+		pipe->pipe_type = ptype;
+		/* use RGB1 pipe */
+		pipe->pipe_num  = OVERLAY_PIPE_RGB1;
+		pipe->mixer_num  = MDP4_MIXER0;
+		pipe->src_format = format;
+		mdp4_overlay_format2pipe(pipe);
+
+		mddi_pipe = pipe; /* keep it */
+
+		mddi_ld_param = 0;
+		mddi_vdo_packet_reg = mfd->panel_info.mddi.vdopkt;
+
+		if (mfd->panel_info.type == MDDI_PANEL) {
+			if (mfd->panel_info.pdest == DISPLAY_1)
+				mddi_ld_param = 0;
+			else
+				mddi_ld_param = 1;
+		} else {
+			mddi_ld_param = 2;
+		}
+
+		MDP_OUTP(MDP_BASE + 0x00090, mddi_ld_param);
+		MDP_OUTP(MDP_BASE + 0x00094,
+			 (MDDI_VDO_PACKET_DESC << 16) | mddi_vdo_packet_reg);
+	} else {
+		pipe = mddi_pipe;
+	}
+
+
+	src = (uint8 *) iBuf->buf;
+
+#ifdef WHOLESCREEN
+	{
+		struct fb_info *fbi;
+
+		fbi = mfd->fbi;
+		pipe->src_height = fbi->var.yres;
+		pipe->src_width = fbi->var.xres;
+		pipe->src_h = fbi->var.yres;
+		pipe->src_w = fbi->var.xres;
+		pipe->src_y = 0;
+		pipe->src_x = 0;
+		pipe->dst_h = fbi->var.yres;
+		pipe->dst_w = fbi->var.xres;
+		pipe->dst_y = 0;
+		pipe->dst_x = 0;
+		pipe->srcp0_addr = (uint32)src;
+		pipe->srcp0_ystride = fbi->var.xres_virtual * bpp;
+	}
+
+#else
+	if (mdp4_overlay_active(MDP4_MIXER0)) {
+		struct fb_info *fbi;
+
+		fbi = mfd->fbi;
+		pipe->src_height = fbi->var.yres;
+		pipe->src_width = fbi->var.xres;
+		pipe->src_h = fbi->var.yres;
+		pipe->src_w = fbi->var.xres;
+		pipe->src_y = 0;
+		pipe->src_x = 0;
+		pipe->dst_h = fbi->var.yres;
+		pipe->dst_w = fbi->var.xres;
+		pipe->dst_y = 0;
+		pipe->dst_x = 0;
+		pipe->srcp0_addr = (uint32) src;
+		pipe->srcp0_ystride = fbi->var.xres_virtual * bpp;
+	} else {
+		/* starting input address */
+		src += (iBuf->dma_x + iBuf->dma_y * iBuf->ibuf_width) * bpp;
+
+		pipe->src_height = iBuf->dma_h;
+		pipe->src_width = iBuf->dma_w;
+		pipe->src_h = iBuf->dma_h;
+		pipe->src_w = iBuf->dma_w;
+		pipe->src_y = 0;
+		pipe->src_x = 0;
+		pipe->dst_h = iBuf->dma_h;
+		pipe->dst_w = iBuf->dma_w;
+		pipe->dst_y = iBuf->dma_y;
+		pipe->dst_x = iBuf->dma_x;
+		pipe->srcp0_addr = (uint32) src;
+		pipe->srcp0_ystride = iBuf->ibuf_width * bpp;
+	}
+#endif
+
+	pipe->mixer_stage  = MDP4_MIXER_STAGE_BASE;
+
+	mdp4_overlay_rgb_setup(pipe);
+
+	mdp4_mixer_stage_up(pipe);
+
+	mdp4_overlayproc_cfg(pipe);
+
+	mdp4_overlay_dmap_xy(pipe);
+
+	mdp4_overlay_dmap_cfg(mfd, 0);
+
+	/* MDP cmd block disable */
+	mdp_pipe_ctrl(MDP_CMD_BLOCK, MDP_BLOCK_POWER_OFF, FALSE);
+
+}
+
+/*
+ * mdp4_overlay0_done_mddi: called from isr
+ */
+void mdp4_overlay0_done_mddi()
+{
+	if (pending_pipe)
+		complete(&pending_pipe->comp);
+}
+
+void mdp4_mddi_overlay_restore(void)
+{
+	/* mutex holded by caller */
+	mdp4_overlay_update_lcd(mddi_mfd);
+	mdp4_mddi_overlay_kickoff(mddi_mfd, mddi_pipe);
+}
+
+void mdp4_mddi_overlay_kickoff(struct msm_fb_data_type *mfd,
+				struct mdp4_overlay_pipe *pipe)
+{
+#ifdef MDP4_NONBLOCKING
+	unsigned long flag;
+
+	spin_lock_irqsave(&mdp_spin_lock, flag);
+	if (mfd->dma->busy == TRUE) {
+		INIT_COMPLETION(pipe->comp);
+		pending_pipe = pipe;
+	}
+	spin_unlock_irqrestore(&mdp_spin_lock, flag);
+
+	if (pending_pipe != NULL) {
+		/* wait until DMA finishes the current job */
+		wait_for_completion_killable(&pipe->comp);
+		pending_pipe = NULL;
+	}
+	down(&mfd->sem);
+	mdp_enable_irq(MDP_OVERLAY0_TERM);
+	mfd->dma->busy = TRUE;
+	/* start OVERLAY pipe */
+	mdp_pipe_kickoff(MDP_OVERLAY0_TERM, mfd);
+	up(&mfd->sem);
+#else
+	down(&mfd->sem);
+	mdp_enable_irq(MDP_OVERLAY0_TERM);
+	mfd->dma->busy = TRUE;
+	INIT_COMPLETION(pipe->comp);
+	pending_pipe = pipe;
+
+	/* start OVERLAY pipe */
+	mdp_pipe_kickoff(MDP_OVERLAY0_TERM, mfd);
+	up(&mfd->sem);
+
+	/* wait until DMA finishes the current job */
+	wait_for_completion_killable(&pipe->comp);
+	mdp_disable_irq(MDP_OVERLAY0_TERM);
+#endif
+
+}
+
+void mdp4_mddi_overlay(struct msm_fb_data_type *mfd)
+{
+	mutex_lock(&mfd->dma->ov_mutex);
+
+	if ((mfd) && (!mfd->dma->busy) && (mfd->panel_power_on)) {
+		mdp4_overlay_update_lcd(mfd);
+
+		mdp4_mddi_overlay_kickoff(mfd, mddi_pipe);
+
+	/* signal if pan function is waiting for the update completion */
+		if (mfd->pan_waiting) {
+			mfd->pan_waiting = FALSE;
+			complete(&mfd->pan_comp);
+		}
+	}
+
+	mutex_unlock(&mfd->dma->ov_mutex);
+}