Remove shutdown

drm_iface.c

@@ -33,6 +33,8 @@
 #include "ioctl_iface.h"
 #include "drm_iface.h"
 
+#include "indicators.h"
+
 #define GPIO_DISP 22
 #define GPIO_SCS 8
 #define GPIO_VCOM 23
@@ -57,6 +59,8 @@ struct sharp_memory_panel {
 	struct spi_transfer *spi_3_xfers;
 	unsigned char *cmd_buf;
 	unsigned char *trailer_buf;
+
+	char indicators[MAX_INDICATORS];
 };
 
 static struct sharp_memory_panel* g_panel = NULL;
@@ -136,6 +140,47 @@ static int sharp_memory_spi_write_tagged_lines(struct sharp_memory_panel *panel,
 	return rc;
 }
 
+static void draw_indicators(struct sharp_memory_panel *panel, u8* buf, int width,
+	struct drm_rect const* clip)
+{
+	int i, dx, dy, sx, sy;
+	u8 const* ind = NULL;
+
+	for (i = 0; i < MAX_INDICATORS; i++) {
+
+		// Get indicator pixels
+		ind = indicator_for(panel->indicators[i]);
+		if (!ind) {
+			continue;
+		}
+
+		// Draw indicator pixels
+		for (sy = 0; sy < INDICATOR_HEIGHT; sy++) {
+
+			if (sy < clip->y1) {
+				continue;
+			} else if (clip->y2 <= sy) {
+				break;
+			}
+
+			dy = sy - clip->y1;
+
+			for (sx = 0; sx < INDICATOR_WIDTH; sx++) {
+
+				if (sx < clip->x1) {
+					continue;
+				} else if (clip->x2 <= sx) {
+					break;
+				}
+
+				dx = (width - ((i + 1) * INDICATOR_WIDTH) + sx) - clip->x1;
+
+				buf[dy * (clip->x2 - clip->x1) + dx] = ind[sy * INDICATOR_HEIGHT + sx];
+			}
+		}
+	}
+}
+
 static size_t sharp_memory_gray8_to_mono_tagged(u8 *buf, int width, int height, int y0)
 {
 	int line, b8, b1;
@@ -189,8 +234,8 @@ static size_t sharp_memory_gray8_to_mono_tagged(u8 *buf, int width, int height,
 // Use DMA to get grayscale representation, then convert to mono
 // with line number and trailer tags suitable for multi-line write
 // Output is stored in `buf`, which must be at least W*H bytes
-static int sharp_memory_clip_mono_tagged(size_t* result_len, u8* buf,
-	struct drm_framebuffer *fb, struct drm_rect const* clip)
+static int sharp_memory_clip_mono_tagged(struct sharp_memory_panel* panel, size_t* result_len,
+	u8* buf, struct drm_framebuffer *fb, struct drm_rect const* clip)
 {
 	int rc;
 	struct drm_gem_dma_object *dma_obj;
@@ -214,6 +259,12 @@ static int sharp_memory_clip_mono_tagged(size_t* result_len, u8* buf,
 	// End DMA area
 	drm_gem_fb_end_cpu_access(fb, DMA_FROM_DEVICE);
 
+	// Add indicators if in range
+	if ((clip->x1 >= (fb->width - INDICATORS_WIDTH))
+	 && (clip->y1 < INDICATOR_HEIGHT)) {
+		draw_indicators(panel, buf, fb->width, clip);
+	}
+
 	// Convert in-place from 8-bit grayscale to mono
 	*result_len = sharp_memory_gray8_to_mono_tagged(buf,
 		(clip->x2 - clip->x1), (clip->y2 - clip->y1), clip->y1);
@@ -246,7 +297,7 @@ static int sharp_memory_fb_dirty(struct drm_framebuffer *fb,
 	}
 
 	// Convert `clip` from framebuffer to mono with line number tags
-	rc = sharp_memory_clip_mono_tagged(&buf_len, panel->buf, fb, &clip);
+	rc = sharp_memory_clip_mono_tagged(panel, &buf_len, panel->buf, fb, &clip);
 	if (rc) {
 		goto out_exit;
 	}
@@ -419,7 +470,7 @@ int drm_probe(struct spi_device *spi)
 	struct device *dev;
 	struct sharp_memory_panel *panel;
 	struct drm_device *drm;
-	int ret;
+	int ret, i;
 
 	printk(KERN_INFO "sharp_memory: entering drm_probe\n");
 
@@ -458,6 +509,9 @@ int drm_probe(struct spi_device *spi)
 	panel->mode = mode;
 	panel->width = mode->hdisplay;
 	panel->height = mode->vdisplay;
+	for (i = 0; i < MAX_INDICATORS; i++) {
+		panel->indicators[i] = '\0';
+	}
 
 	// Allocate reused heap buffers suitable for SPI source
 	panel->buf = devm_kzalloc(dev, panel->width * panel->height, GFP_KERNEL);
@@ -510,39 +564,57 @@ int drm_probe(struct spi_device *spi)
 void drm_remove(struct spi_device *spi)
 {
 	struct drm_device *drm;
-	struct sharp_memory_panel *panel;
 
-	printk(KERN_DEBUG "sharp_memory: drm_remove\n");
+	printk(KERN_INFO "sharp_memory: drm_remove\n");
 
 	// Clear global panel
 	g_panel = NULL;
 
 	// Get DRM and panel device from SPI
 	drm = spi_get_drvdata(spi);
-	panel = drm_to_panel(drm);
 
 	drm_dev_unplug(drm);
 	drm_atomic_helper_shutdown(drm);
 }
 
-void drm_shutdown(struct spi_device *spi)
-{
-	drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-}
-
 int drm_refresh(void)
 {
 	struct drm_rect dirty_rect;
 
-	if (g_panel && g_panel->fb) {
+	if (!g_panel || !g_panel->fb) {
+		return 0;
+	}
+
+	g_panel->indicators[0] = '^';
 
 	// Refresh framebuffer
 	dirty_rect.x1 = 0;
 	dirty_rect.x2 = g_panel->fb->width;
 	dirty_rect.y1 = 0;
 	dirty_rect.y2 = g_panel->fb->height;
+
 	return sharp_memory_fb_dirty(g_panel->fb, &dirty_rect);
 }
 
-	return 0;
+int drm_set_indicator(size_t idx, char c)
+{
+	struct drm_rect dirty_rect;
+
+	if (!g_panel || !g_panel->fb) {
+		return -1;
+	}
+
+	// Set indicator
+	if (idx >= MAX_INDICATORS) {
+		return -1;
+	}
+	g_panel->indicators[idx] = c;
+
+	// Refresh framebuffer
+	dirty_rect.x1 = g_panel->fb->width - INDICATORS_WIDTH;
+	dirty_rect.x2 = g_panel->fb->width;
+	dirty_rect.y1 = 0;
+	dirty_rect.y2 = INDICATOR_HEIGHT;
+
+	return sharp_memory_fb_dirty(g_panel->fb, &dirty_rect);
 }

drm_iface.h

@@ -27,7 +27,6 @@
 
 int drm_probe(struct spi_device *spi);
 void drm_remove(struct spi_device *spi);
-void drm_shutdown(struct spi_device *spi);
 
 int drm_refresh(void);
 

indicators.h

@@ -0,0 +1,31 @@
+#ifndef INDICATORS_H_
+#define INDICATORS_H_
+
+#define MAX_INDICATORS 6
+#define INDICATOR_WIDTH 8
+#define INDICATOR_HEIGHT 8
+#define INDICATORS_WIDTH (INDICATOR_WIDTH * MAX_INDICATORS)
+
+static u8 const ind_shift[] =
+{    0,    0,    0, 0xff, 0xff,    0,    0,    0
+,    0,    0, 0xff, 0xff, 0xff, 0xff,    0,    0
+,    0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,    0
+, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+,    0,    0,    0, 0xff, 0xff,    0,    0,    0
+,    0,    0,    0, 0xff, 0xff,    0,    0,    0
+,    0,    0,    0, 0xff, 0xff,    0,    0,    0
+,    0,    0,    0, 0xff, 0xff,    0,    0,    0
+};
+
+static u8 const* indicator_for(char c)
+{
+	switch (c) {
+
+	case '^': return ind_shift;
+
+	default:
+		return NULL;
+	}
+}
+
+#endif

ioctl_iface.c

@@ -11,8 +11,3 @@ void ioctl_remove(void)
 {
 	return;
 }
-
-void ioctl_shutdown(void)
-{
-	return;
-}

ioctl_iface.h

@@ -3,6 +3,5 @@
 
 int ioctl_probe(void);
 void ioctl_remove(void);
-void ioctl_shutdown(void);
 
 #endif

main.c

@@ -44,9 +44,7 @@ static void sharp_memory_remove(struct spi_device *spi)
 
 static void sharp_memory_shutdown(struct spi_device *spi)
 {
-	ioctl_shutdown();
-	params_shutdown();
-	drm_shutdown(spi);
+	sharp_memory_remove(spi);
 }
 
 static struct spi_driver sharp_memory_spi_driver = {

params_iface.c

@@ -46,8 +46,3 @@ void params_remove(void)
 {
 	return;
 }
-
-void params_shutdown(void)
-{
-	return;
-}

params_iface.h

@@ -6,6 +6,5 @@ extern int g_param_mono_invert;
 
 int params_probe(void);
 void params_remove(void);
-void params_shutdown(void);
 
 #endif

sharp.dts

@@ -31,7 +31,6 @@
 		__overlay__ {
 			sharp_pins: sharp_pins {
 				brcm,pins = <23 22>;
-				/* brcm,pins = <9 23>; */ /* <- older revision */
 				brcm,function = <1 1>; /* out */
 			};
 		};
@@ -50,12 +49,10 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&sharp_pins>;
 				spi-cs-high = <1>;
-				spi-max-frequency = <2000000>;
+				spi-max-frequency = <8000000>;
 				buswidth = <8>;
 				debug = <0>;
-
-			};
-
+			};
 		};
 	};
 };