Hi all,
This patch implements VRFB based rotation support to the
framebuffer driver (for omap 2430 platform).
It is tested in VGA and QVGA resolution in omap2evm board,
i was unable to test it on 2430sdp because my SDP is not booting
with the latest git kernel.
I am really glad to hear your comments about this , please
let me know you suggestions i will try to change accordingly.
Many thanks to khasim for the help received from him.
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>From e10a7dd4c624b20d50ac715ef867fa28d7068d97 Mon Sep 17 00:00:00 2001
From: arun <arunedarath@xxxxxxxxxxxxxxxxxxxx>
Date: Sat, 19 Apr 2008 18:33:43 +0530
Subject: [PATCH] This patch adds VRFB based rotation support to omapfb
The features are:
a) Processor and applications writes to VRFB0 space and the display
controller reads from different VRFB space according to degree of
rotation.
b) Pass video=omapfb:rotate:<degree> to see the penguin rotate.
c) Clean up code is not implemented as of now(like unmapping the VRFB regions)
---
drivers/video/omap/dispc.c | 210 ++++++++++++++++++++++++++++++++++++++
drivers/video/omap/omapfb_main.c | 23 +++--
2 files changed, 225 insertions(+), 8 deletions(-)
diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c
index 4c055a2..419472e 100644
--- a/drivers/video/omap/dispc.c
+++ b/drivers/video/omap/dispc.c
@@ -148,6 +148,44 @@
#define RESMAP_MASK(_page_nr) \
(1 << ((_page_nr) & (sizeof(unsigned long) * 8 - 1)))
+/* Rotation using VRFB */
+#define ROTATION_TEST 1
+#define SMS_ROT_VIRT_BASE(context, degree) (0x70000000 \
+ | 0x4000000 * (context) \
+ | 0x1000000 * (degree/90))
+#define VRFB_SIZE (2048 * 640 * (16/8))
+#define PAGE_WIDTH_EXP 5 /* Assuming SDRAM pagesize= 1024 */
+#define PAGE_HEIGHT_EXP 5 /* 1024 = 2^5 * 2^5 */
+#define SMS_IMAGEHEIGHT_OFFSET 16
+#define SMS_IMAGEWIDTH_OFFSET 0
+#define SMS_PH_OFFSET 8
+#define SMS_PW_OFFSET 4
+#define SMS_PS_OFFSET 0
+#define ROT_LINE_LENGTH 2048
+
+#define OMAP_SMS_BASE (0x6C000000)
+
+#define SMS_ROT0_PHYSICAL_BA(context) __REG32(OMAP_SMS_BASE + 0x188 \
+ + 0x10 * context)
+#define SMS_ROT_CONTROL(context) __REG32(OMAP_SMS_BASE + 0x180 \
+ + 0x10 * context)
+#define SMS_ROT0_SIZE(context) __REG32(OMAP_SMS_BASE + 0x184 \
+ + 0x10 * context)
+
+dma_addr_t save_paddr;
+unsigned long save_vaddr;
+unsigned long save_offset;
+int vrfb_rotation;
+
+static struct {
+ dma_addr_t sms_rot_phy[4];
+ unsigned long sms_rot_virt[4];
+ u32 xoffset;
+ u32 yoffset;
+} vrfb;
+
+static int omap2_disp_set_vrfb(u32 width, u32 height, u32 bytes_per_pixel);
+
struct resmap {
unsigned long start;
unsigned page_cnt;
@@ -449,6 +487,7 @@ static int omap_dispc_setup_plane(int plane, int
channel_out,
if ((unsigned)plane > dispc.mem_desc.region_cnt)
return -EINVAL;
+ save_offset = offset;
paddr = dispc.mem_desc.region[plane].paddr + offset;
enable_lcd_clocks(1);
r = _setup_plane(plane, channel_out, paddr,
@@ -458,6 +497,111 @@ static int omap_dispc_setup_plane(int plane, int
channel_out,
return r;
}
+static inline u32
+calc_vrfb_div(u32 img_side, u32 page_exp)
+{
+ u32 div;
+ div = img_side / page_exp;
+ if ((div * page_exp) < img_side)
+ return div + 1;
+ else
+ return div;
+}
+
+static int omap2_disp_set_vrfb(u32 width, u32 height, u32 bytes_per_pixel)
+{
+ int page_width_exp, page_height_exp, pixel_size_exp;
+ int context = 0;
+ int div;
+ u32 vrfb_width;
+ u32 vrfb_height;
+
+ page_width_exp = PAGE_WIDTH_EXP;
+ page_height_exp = PAGE_HEIGHT_EXP;
+ pixel_size_exp = bytes_per_pixel >> 1;
+
+ div = calc_vrfb_div(width * bytes_per_pixel, 1 << page_width_exp);
+ vrfb_width = (div * (1 << page_width_exp)) / bytes_per_pixel;
+
+ div = calc_vrfb_div(height, 1 << page_height_exp);
+ vrfb_height = div * (1 << page_height_exp);
+
+ SMS_ROT0_PHYSICAL_BA(context) = save_paddr;
+ SMS_ROT0_SIZE(context) = 0;
+ SMS_ROT0_SIZE(context) |= (vrfb_width << SMS_IMAGEWIDTH_OFFSET)
+ | (vrfb_height << SMS_IMAGEHEIGHT_OFFSET);
+ SMS_ROT_CONTROL(context) = 0;
+ SMS_ROT_CONTROL(context) |= pixel_size_exp << SMS_PS_OFFSET
+ | page_width_exp << SMS_PW_OFFSET
+ | page_height_exp << SMS_PH_OFFSET;
+
+ vrfb.xoffset = vrfb_width - width;
+ vrfb.yoffset = vrfb_height - height;
+ return 0;
+}
+
+static int omap_dispc_set_rotate(int angle)
+{
+ const u32 ba_reg[] = { DISPC_GFX_BA0 };
+ const u32 ri_reg[] = { DISPC_GFX_ROW_INC };
+ const u32 pi_reg[] = { DISPC_GFX_PIXEL_INC };
+ int width, height;
+ u32 addr_base;
+ u32 Bpp;
+
+ if (vrfb_rotation != 1)
+ return 0;
+
+ width = dispc.fbdev->fb_info[0]->var.xres;
+ height = dispc.fbdev->fb_info[0]->var.yres;
+ Bpp = dispc.fbdev->fb_info[0]->var.bits_per_pixel / 8;
+
+ enable_lcd_clocks(1);
+
+ switch (angle) {
+ case 0:
+ omap2_disp_set_vrfb(width, height, Bpp);
+ addr_base = SMS_ROT_VIRT_BASE(0, 0) + save_offset;
+ dispc_write_reg(ba_reg[0], addr_base);
+ dispc_write_reg(pi_reg[0], 1);
+ dispc_write_reg(ri_reg[0], (ROT_LINE_LENGTH - width) * Bpp + 1);
+ break;
+ case 90:
+ omap2_disp_set_vrfb(height, width, Bpp);
+ addr_base = SMS_ROT_VIRT_BASE(0, 90) + save_offset
+ + vrfb.yoffset * Bpp;
+
+ dispc_write_reg(ba_reg[0], addr_base);
+ dispc_write_reg(pi_reg[0], 1);
+ dispc_write_reg(ri_reg[0], (ROT_LINE_LENGTH - width) * Bpp + 1);
+ break;
+ case 180:
+ omap2_disp_set_vrfb(width, height, Bpp);
+ addr_base = SMS_ROT_VIRT_BASE(0, 180) + save_offset
+ + vrfb.xoffset * Bpp
+ + ROT_LINE_LENGTH * vrfb.yoffset * Bpp;
+
+ dispc_write_reg(ba_reg[0], addr_base);
+ dispc_write_reg(pi_reg[0], 1);
+ dispc_write_reg(ri_reg[0], (ROT_LINE_LENGTH - width) * Bpp + 1);
+ break;
+ case 270:
+ omap2_disp_set_vrfb(height, width, Bpp);
+ addr_base = SMS_ROT_VIRT_BASE(0, 270) + save_offset
+ + ROT_LINE_LENGTH * vrfb.xoffset * Bpp;
+
+ dispc_write_reg(ba_reg[0], addr_base);
+ dispc_write_reg(pi_reg[0], 1);
+ dispc_write_reg(ri_reg[0], (ROT_LINE_LENGTH - width) * Bpp + 1);
+ break;
+ }
+
+ MOD_REG_FLD(DISPC_CONTROL, 0x20, 0); /* Sets & clears the GOLCD bit */
+ MOD_REG_FLD(DISPC_CONTROL, 0x20, 0x20);
+ enable_lcd_clocks(0);
+ return 0;
+}
+
static void write_firh_reg(int plane, int reg, u32 value)
{
u32 base;
@@ -1422,9 +1566,74 @@ static int omap_dispc_init(struct omapfb_device
*fbdev, int ext_mode,
if ((r = alloc_palette_ram()) < 0)
goto fail2;
+#ifdef ROTATION_TEST
+ memset(&vrfb, 0, sizeof(vrfb));
+ vrfb_rotation = 1;
+ vrfb.sms_rot_phy[0] = SMS_ROT_VIRT_BASE(0, 0);
+ vrfb.sms_rot_phy[1] = SMS_ROT_VIRT_BASE(0, 90);
+ vrfb.sms_rot_phy[2] = SMS_ROT_VIRT_BASE(0, 180);
+ vrfb.sms_rot_phy[3] = SMS_ROT_VIRT_BASE(0, 270);
+
+ if (!request_mem_region(vrfb.sms_rot_phy[0],
+ req_vram->region[0].size, "omapfb")) {
+ printk(KERN_ERR "omapfb:can't reserve VRFB0 area\n");
+ vrfb_rotation++;
+ }
+
+ if (!request_mem_region(vrfb.sms_rot_phy[1],
+ req_vram->region[0].size, "omapfb")) {
+ printk(KERN_ERR "omapfb:can't reserve VRFB90 area\n");
+ vrfb_rotation++;
+ }
+
+ if (!request_mem_region(vrfb.sms_rot_phy[2],
+ req_vram->region[0].size, "omapfb")) {
+ printk(KERN_ERR "omapfb:can't reserve VRFB180 area\n");
+ vrfb_rotation++;
+ }
+
+ if (!request_mem_region(vrfb.sms_rot_phy[3],
+ req_vram->region[0].size, "omapfb")) {
+ printk(KERN_ERR "omapfb:can,t reserve VRFB270 area\n");
+ vrfb_rotation++;
+ }
+
+ if (!(vrfb.sms_rot_virt[0] =
+ (unsigned long) ioremap(vrfb.sms_rot_phy[0],
+ req_vram->region[0].size)) ||
+ !(vrfb.sms_rot_virt[1] =
+ (unsigned long) ioremap(vrfb.sms_rot_phy[1],
+ req_vram->region[0].size)) ||
+ !(vrfb.sms_rot_virt[2] =
+ (unsigned long) ioremap(vrfb.sms_rot_phy[2],
+ req_vram->region[0].size)) ||
+ !(vrfb.sms_rot_virt[3] =
+ (unsigned long) ioremap(vrfb.sms_rot_phy[3],
+ req_vram->region[0].size)))
+
+ {
+ printk(KERN_ERR "omapfb: cannot map rotated view(s)\n");
+ vrfb_rotation++;
+ }
+#endif
+
if ((r = setup_fbmem(req_vram)) < 0)
goto fail3;
+ if (vrfb_rotation == 1) {
+ save_paddr = dispc.mem_desc.region[0].paddr;
+ save_vaddr = (unsigned long)dispc.mem_desc.region[0].vaddr;
+
+ dispc.mem_desc.region[0].vaddr = (void *)vrfb.sms_rot_virt[0];
+ dispc.mem_desc.region[0].paddr = vrfb.sms_rot_phy[0];
+ dispc.fbdev->mem_desc.region[0].vaddr =
+ (void *)vrfb.sms_rot_virt[0];
+
+ dispc.fbdev->mem_desc.region[0].paddr = vrfb.sms_rot_phy[0];
+ omap2_disp_set_vrfb(panel->x_res, panel->y_res,
+ panel->bpp / 8);
+ }
+
if (!skip_init) {
for (i = 0; i < dispc.mem_desc.region_cnt; i++) {
memset(dispc.mem_desc.region[i].vaddr, 0,
@@ -1503,4 +1712,5 @@ const struct lcd_ctrl omap2_int_ctrl = {
.set_color_key = omap_dispc_set_color_key,
.get_color_key = omap_dispc_get_color_key,
.mmap = omap_dispc_mmap_user,
+ .set_rotate = omap_dispc_set_rotate,
};
diff --git a/drivers/video/omap/omapfb_main.c b/drivers/video/omap/omapfb_main.c
index 418ed9f..2a9500b 100644
--- a/drivers/video/omap/omapfb_main.c
+++ b/drivers/video/omap/omapfb_main.c
@@ -32,6 +32,8 @@
#include <asm/arch/omapfb.h>
#define MODULE_NAME "omapfb"
+#define ROTATION_TEST 1
+#define ROT_LINE_LENGTH 2048
static unsigned int def_accel;
static unsigned long def_vram[OMAPFB_PLANE_NUM];
@@ -422,7 +424,11 @@ static void set_fb_fix(struct fb_info *fbi)
break;
}
fix->accel = FB_ACCEL_OMAP1610;
+#ifdef ROTATION_TEST
+ fix->line_length = ROT_LINE_LENGTH * bpp / 8;
+#else
fix->line_length = var->xres_virtual * bpp / 8;
+#endif
}
static int set_color_mode(struct omapfb_plane_struct *plane,
@@ -495,13 +501,14 @@ static int set_fb_var(struct fb_info *fbi,
if (plane->color_mode == OMAPFB_COLOR_RGB444)
bpp = 16;
+ xres_min = OMAPFB_PLANE_XRES_MIN;
+ xres_max = panel->x_res;
+ yres_min = OMAPFB_PLANE_YRES_MIN;
+ yres_max = panel->y_res;
+
switch (var->rotate) {
case 0:
case 180:
- xres_min = OMAPFB_PLANE_XRES_MIN;
- xres_max = panel->x_res;
- yres_min = OMAPFB_PLANE_YRES_MIN;
- yres_max = panel->y_res;
if (cpu_is_omap15xx()) {
var->xres = panel->x_res;
var->yres = panel->y_res;
@@ -509,10 +516,6 @@ static int set_fb_var(struct fb_info *fbi,
break;
case 90:
case 270:
- xres_min = OMAPFB_PLANE_YRES_MIN;
- xres_max = panel->y_res;
- yres_min = OMAPFB_PLANE_XRES_MIN;
- yres_max = panel->x_res;
if (cpu_is_omap15xx()) {
var->xres = panel->y_res;
var->yres = panel->x_res;
@@ -1715,7 +1718,11 @@ static int omapfb_do_probe(struct platform_device *pdev,
pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
+#ifdef ROTATION_TEST
+ def_vxres = ROT_LINE_LENGTH;
+#else
def_vxres = def_vxres ? : fbdev->panel->x_res;
+#endif
def_vyres = def_vyres ? : fbdev->panel->y_res;
init_state++;
--
1.5.3.4
Regards,
Arun C
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