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drm/fb: add more correct 8/16/24/32 bpp fb support.
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The previous patches had some unwanted side effects, I've fixed
the lack of 32bpp working, and fixed up 16bpp so it should also work.

this also adds the interface to allow the driver to set a preferred
console depth so for example low memory rn50 can set it to 8bpp.
It also catches 24bpp on cards that can't do it and forces 32bpp.

Tested on r100/r600/i945.

Signed-off-by: Dave Airlie <airlied@redhat.com>
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Dave Airlie committed Oct 6, 2009
1 parent 068143d commit b8c00ac
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Showing 8 changed files with 110 additions and 56 deletions.
95 changes: 62 additions & 33 deletions drivers/gpu/drm/drm_fb_helper.c
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Original file line number Diff line number Diff line change
Expand Up @@ -454,6 +454,54 @@ int drm_fb_helper_init_crtc_count(struct drm_fb_helper *helper, int crtc_count,
}
EXPORT_SYMBOL(drm_fb_helper_init_crtc_count);

static void setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, u16 regno, struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
struct drm_framebuffer *fb = fb_helper->fb;
int pindex;

pindex = regno;

if (fb->bits_per_pixel == 16) {
pindex = regno << 3;

if (fb->depth == 16 && regno > 63)
return;
if (fb->depth == 15 && regno > 31)
return;

if (fb->depth == 16) {
u16 r, g, b;
int i;
if (regno < 32) {
for (i = 0; i < 8; i++)
fb_helper->funcs->gamma_set(crtc, red,
green, blue, pindex + i);
}

fb_helper->funcs->gamma_get(crtc, &r,
&g, &b,
pindex >> 1);

for (i = 0; i < 4; i++)
fb_helper->funcs->gamma_set(crtc, r,
green, b,
(pindex >> 1) + i);
}
}

if (fb->depth != 16)
fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);

if (regno < 16 && info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
((u32 *) fb->pseudo_palette)[regno] =
(regno << info->var.red.offset) |
(regno << info->var.green.offset) |
(regno << info->var.blue.offset);
}
}

int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
Expand Down Expand Up @@ -488,7 +536,7 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
if (transp)
htransp = *transp++;

fb_helper->funcs->gamma_set(crtc, hred, hgreen, hblue, start++);
setcolreg(crtc, hred, hgreen, hblue, start++, info);
}
crtc_funcs->load_lut(crtc);
}
Expand All @@ -508,46 +556,21 @@ int drm_fb_helper_setcolreg(unsigned regno,
struct drm_crtc *crtc;
int i;

list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct drm_framebuffer *fb = fb_helper->fb;
if (regno > 255)
return 1;

list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
for (i = 0; i < fb_helper->crtc_count; i++) {
if (crtc->base.id == fb_helper->crtc_info[i].crtc_id)
break;
}
if (i == fb_helper->crtc_count)
continue;

if (regno > 255)
return 1;

if (fb->depth == 8) {
fb_helper->funcs->gamma_set(crtc, red, green, blue, regno);
return 0;
}

if (regno < 16) {
u32 *pal = fb->pseudo_palette;
switch (fb->depth) {
case 15:
pal[regno] = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
break;
case 16:
pal[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 24:
case 32:
pal[regno] =
(((red >> 8) & 0xff) << info->var.red.offset) |
(((green >> 8) & 0xff) << info->var.green.offset) |
(((blue >> 8) & 0xff) << info->var.blue.offset);
break;
}
}
setcolreg(crtc, red, green, blue, regno, info);
crtc_funcs->load_lut(crtc);
}
return 0;
}
Expand Down Expand Up @@ -717,6 +740,7 @@ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
EXPORT_SYMBOL(drm_fb_helper_pan_display);

int drm_fb_helper_single_fb_probe(struct drm_device *dev,
int preferred_bpp,
int (*fb_create)(struct drm_device *dev,
uint32_t fb_width,
uint32_t fb_height,
Expand All @@ -739,6 +763,11 @@ int drm_fb_helper_single_fb_probe(struct drm_device *dev,
struct drm_fb_helper *fb_helper;
uint32_t surface_depth = 24, surface_bpp = 32;

/* if driver picks 8 or 16 by default use that
for both depth/bpp */
if (preferred_bpp != surface_bpp) {
surface_depth = surface_bpp = preferred_bpp;
}
/* first up get a count of crtcs now in use and new min/maxes width/heights */
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
struct drm_fb_helper_connector *fb_help_conn = connector->fb_helper_private;
Expand Down Expand Up @@ -899,7 +928,7 @@ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
{
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
FB_VISUAL_TRUECOLOR;
FB_VISUAL_DIRECTCOLOR;
info->fix.type_aux = 0;
info->fix.xpanstep = 1; /* doing it in hw */
info->fix.ypanstep = 1; /* doing it in hw */
Expand Down
10 changes: 10 additions & 0 deletions drivers/gpu/drm/i915/intel_display.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -2922,6 +2922,16 @@ void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
intel_crtc->lut_b[regno] = blue >> 8;
}

void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);

*red = intel_crtc->lut_r[regno] << 8;
*green = intel_crtc->lut_g[regno] << 8;
*blue = intel_crtc->lut_b[regno] << 8;
}

static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t size)
{
Expand Down
2 changes: 2 additions & 0 deletions drivers/gpu/drm/i915/intel_drv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -173,6 +173,8 @@ extern int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc);
extern void intelfb_restore(void);
extern void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno);
extern void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno);

extern int intel_framebuffer_create(struct drm_device *dev,
struct drm_mode_fb_cmd *mode_cmd,
Expand Down
7 changes: 6 additions & 1 deletion drivers/gpu/drm/i915/intel_fb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,7 @@ static struct fb_ops intelfb_ops = {

static struct drm_fb_helper_funcs intel_fb_helper_funcs = {
.gamma_set = intel_crtc_fb_gamma_set,
.gamma_get = intel_crtc_fb_gamma_get,
};


Expand Down Expand Up @@ -124,6 +125,10 @@ static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
struct device *device = &dev->pdev->dev;
int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;

/* we don't do packed 24bpp */
if (surface_bpp == 24)
surface_bpp = 32;

mode_cmd.width = surface_width;
mode_cmd.height = surface_height;

Expand Down Expand Up @@ -245,7 +250,7 @@ int intelfb_probe(struct drm_device *dev)
int ret;

DRM_DEBUG("\n");
ret = drm_fb_helper_single_fb_probe(dev, intelfb_create);
ret = drm_fb_helper_single_fb_probe(dev, 32, intelfb_create);
return ret;
}
EXPORT_SYMBOL(intelfb_probe);
Expand Down
39 changes: 18 additions & 21 deletions drivers/gpu/drm/radeon/radeon_display.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -106,24 +106,33 @@ void radeon_crtc_load_lut(struct drm_crtc *crtc)
legacy_crtc_load_lut(crtc);
}

/** Sets the color ramps on behalf of RandR */
/** Sets the color ramps on behalf of fbcon */
void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

if (regno == 0)
DRM_DEBUG("gamma set %d\n", radeon_crtc->crtc_id);
radeon_crtc->lut_r[regno] = red >> 6;
radeon_crtc->lut_g[regno] = green >> 6;
radeon_crtc->lut_b[regno] = blue >> 6;
}

/** Gets the color ramps on behalf of fbcon */
void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

*red = radeon_crtc->lut_r[regno] << 6;
*green = radeon_crtc->lut_g[regno] << 6;
*blue = radeon_crtc->lut_b[regno] << 6;
}

static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t size)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
int i, j;
int i;

if (size != 256) {
return;
Expand All @@ -132,23 +141,11 @@ static void radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
return;
}

if (crtc->fb->depth == 16) {
for (i = 0; i < 64; i++) {
if (i <= 31) {
for (j = 0; j < 8; j++) {
radeon_crtc->lut_r[i * 8 + j] = red[i] >> 6;
radeon_crtc->lut_b[i * 8 + j] = blue[i] >> 6;
}
}
for (j = 0; j < 4; j++)
radeon_crtc->lut_g[i * 4 + j] = green[i] >> 6;
}
} else {
for (i = 0; i < 256; i++) {
radeon_crtc->lut_r[i] = red[i] >> 6;
radeon_crtc->lut_g[i] = green[i] >> 6;
radeon_crtc->lut_b[i] = blue[i] >> 6;
}
/* userspace palettes are always correct as is */
for (i = 0; i < 256; i++) {
radeon_crtc->lut_r[i] = red[i] >> 6;
radeon_crtc->lut_g[i] = green[i] >> 6;
radeon_crtc->lut_b[i] = blue[i] >> 6;
}

radeon_crtc_load_lut(crtc);
Expand Down
8 changes: 7 additions & 1 deletion drivers/gpu/drm/radeon/radeon_fb.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -124,6 +124,7 @@ static int radeon_align_pitch(struct radeon_device *rdev, int width, int bpp, bo

static struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
.gamma_set = radeon_crtc_fb_gamma_set,
.gamma_get = radeon_crtc_fb_gamma_get,
};

int radeonfb_create(struct drm_device *dev,
Expand Down Expand Up @@ -151,6 +152,11 @@ int radeonfb_create(struct drm_device *dev,

mode_cmd.width = surface_width;
mode_cmd.height = surface_height;

/* avivo can't scanout real 24bpp */
if ((surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
surface_bpp = 32;

mode_cmd.bpp = surface_bpp;
/* need to align pitch with crtc limits */
mode_cmd.pitch = radeon_align_pitch(rdev, mode_cmd.width, mode_cmd.bpp, fb_tiled) * ((mode_cmd.bpp + 1) / 8);
Expand Down Expand Up @@ -315,7 +321,7 @@ int radeon_parse_options(char *options)

int radeonfb_probe(struct drm_device *dev)
{
return drm_fb_helper_single_fb_probe(dev, &radeonfb_create);
return drm_fb_helper_single_fb_probe(dev, 32, &radeonfb_create);
}

int radeonfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
Expand Down
2 changes: 2 additions & 0 deletions drivers/gpu/drm/radeon/radeon_mode.h
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Original file line number Diff line number Diff line change
Expand Up @@ -407,6 +407,8 @@ extern void
radeon_combios_encoder_dpms_scratch_regs(struct drm_encoder *encoder, bool on);
extern void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno);
extern void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno);
struct drm_framebuffer *radeon_framebuffer_create(struct drm_device *dev,
struct drm_mode_fb_cmd *mode_cmd,
struct drm_gem_object *obj);
Expand Down
3 changes: 3 additions & 0 deletions include/drm/drm_fb_helper.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,8 @@ struct drm_fb_helper_crtc {
struct drm_fb_helper_funcs {
void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno);
void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno);
};

/* mode specified on the command line */
Expand Down Expand Up @@ -71,6 +73,7 @@ struct drm_fb_helper {
};

int drm_fb_helper_single_fb_probe(struct drm_device *dev,
int preferred_bpp,
int (*fb_create)(struct drm_device *dev,
uint32_t fb_width,
uint32_t fb_height,
Expand Down

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